IPC_Reference_manual_Vol_1_Final (1).pdf

NATIONAL INFECTION PREVENTION AND CONTROL
REFERENCE MANUAL FOR HEALTHCARE SERVICE
PROVIDERS AND MANAGERS
VOLUME 1: GENERAL INFECTION PREVENTION AND CONTROL
THIRD EDITION
MARCH 2023

National Infection Prevention and Control Reference Manual for Healthcare Service Providers and Managers | Volume 1
Foreword 2
FOREWORD
The Government of Ethiopia is committed to improving the quality of healthcare for its citizens.
Among the many initiatives underway, the protection of patients and healthcare workers from
infection and the reduction of antimicrobial resistance (AMR) at healthcare facilities have been given
particular attention by the Federal Ministry of Health (FMOH). Infection prevention and control
(IPC) is a critical component of quality health services. The FMOH is scaling up its health facility-
related IPC activities and will use all opportunities to strengthen ongoing IPC activities. As in many
of its programs, the FMOH’s IPC endeavors are guided by current scientific evidence to establish
optimal IPC practices and processes at healthcare facilities. Global estimates on healthcare-acquired
infections show that hundreds of millions of patients are affected every year worldwide, with the
burden of disease especially high in low- and middle-income countries.
Healthcare-associated infection causes a real threat to healthcare providers and communities at large
and, at times, brings additional costs to patients, in particular, and to the healthcare system, in general.
Because of inadequate IPC practices, healthcare providers and patients are at increased risk of
acquiring serious infections, such as HIV, hepatitis B virus (HBV), hepatitis C virus (HCV), Ebola,
and other emerging and reemerging bacterial or viral infections, including AMR and multidrug-
resistant tuberculosis. Fortunately, most healthcare-associated infections at healthcare facilities can
be prevented with the use of readily available, relatively inexpensive, and simple strategies.
In Ethiopia, where many healthcare settings are resource constrained, the control of the risk of
acquiring healthcare-associated infection is very challenging. For the control measures or practices
to be effective, material resources, human resources, training, policy, guidelines, and IPC programs
are essential. IPC in healthcare settings is a broad, cross-cutting component of healthcare, which
involves every aspect of patient care, food hygiene, housekeeping, laundry service, and waste
management, among other components.
The FMOH has been implementing and revising sets of IPC guidelines to improve IPC practices in
healthcare facilities over several years. This IPC reference manual is primarily intended for use by
healthcare providers and health service managers. It will help users by providing clear guidance
on the provision of standard IPC practices at their respective facilities. The material was developed
by incorporating Ethiopian experiences, international best practices, and standardized
recommendations. It is composed of innovative and evidence-based methods used widely all over
the world to reduce the incidence of healthcare-associated infections and the associated healthcare
costs. It is also expected that health bureaus, program managers, other stakeholders, and interest
groups will benefit from consulting this reference manual. I wish to extend my heartfelt gratitude to
all individuals and institutions that have contributed to the completion of this revised reference
manual.
Lia Tadesse,M.D,MHA
Minister, Ministry of Health

ACKNOWLEDGMENT 3
ACKNOWLEDGMENT
Infection prevention and control (IPC) refers to measures aimed at preventing and controlling
infections and transmission of infections in healthcare settings and the community. IPC is crucial
in all healthcare facilities and is critical for a well-functioning healthcare system. Ensuring
compliance with IPC practices depends on understanding the extent of the implementation of
policies and guidelines. Many hospitals are inadequately staffed with healthcare workers with IPC
expertise, and there is acute awareness of the need to address this problem. Implementation of IPC
guidelines is essential in all healthcare facilities for the wellbeing and safety of patients, staff, and
visitors.
IPC programmes have been demonstrated to be clinically and financially beneficial, resulting in
significant cost savings from fewer Healthcare-Associated Infections (HAIs), shorter hospital
stays, lower levels of antibiotic resistance, and lower costs of treating infections. These infections
may already present at the time of admission or they may develop over time (nosocomial
infections) in healthcare facilities.
The Infection Prevention and Control Policy, Strategy and Strategy Roadmap, and Monitoring and
Evaluation Plan were created by the Ministry of Health and are currently being implemented
throughout all the health care systems. Additionally, the updated guide manual will benefit users
by offering clear instructions on how to implement conventional IPC practices at their own
facilities. The Ministry of Health's updated reference manual on infection prevention and control
(IPC) addresses growing concerns about ineffective IPC procedures in healthcare facilities
nationwide as well as the need for ongoing readiness and response in the wake of the emergence
of emerging and re-emerging infections like the ongoing Covid-19 pandemic. The road map for
putting sustainable IPC measures into practice is provided in this document.
In order to implement the policy and guidelines, it is essential to establish a strategy work plan that
will act as a road map for all stakeholders (the Ministry, development and implementing partners).
This will make it easier to guarantee that we complete IPC and related tasks on schedule and in
line with scope. I want to thank the National IPC TWG for their dedication in writing and
reviewing this material.
The reference guide was created by taking into account Ethiopian experiences, global best
practices, and predetermined suggestions. It is made up of cutting-edge, empirically supported
techniques that are extensively employed around the globe to lower the prevalence of healthcare-
associated infections and the corresponding healthcare costs. It is anticipated that this reference
guide will be useful to health bureaus, programme managers, other stakeholders, and interest
groups.
Finally, I want to express my sincere gratitude to all the people and organizations who helped
produce and update this reference manual.
Abas Hassen, PhD
Lead Executive Officer
Health System Innovation and Improvement

ACKNOWLEDGMENT 4
The National Infection Prevention and Control reference manual for Health Care Settings has been
updated through the contributions of many individuals and institutions that are committed to
improve the infection prevention and control practice in health care settings.
FMOH would like to especially thank Jhpiego’s headquarters and country office. This revised
manual is adapted from Jhpiego’s Infection Prevention and Control: Reference Manual for Health
Care Facilities with Limited Resources, published in 2018. MOH would also like to acknowledge
the Medicines, Technologies, and Pharmaceutical Services (MTaPS) program, which is funded by
the US Agency for International Development (USAID), for providing financial and technical
support for the revision of this document.
MOH would like to thank the National Technical Working Group on Infection Prevention and
Control, for their expertise and time to review this national reference manual and everyone who
contributed by reviewing and provide technical inputs in the revision of the guideline.
IPC Advisory Technical Working Group members and key contributors:
Dr. Abas Hassen Ministry of Health
Mr. Markos Paulos Ministry of Health
Mr. Molla Godif Ministry of Health
Dr. Fahmi Ahmed WHO Country Office
Mr. Abebe Shume Jhpiego-Ethiopia
Mr. Tewodros Fantahun USAID MTaPS Program
Mr. Arone Mebrhatu Ethiopian Public Health Institute
Dr. Ashenafi Negash ICAP-Ethiopia
Mrs. Selamawit Gebreegziabiher CDC- Ethiopia
Mr. Addisalem Bogale SPHMMC
Mr. Feyisa Regassa Tikur Anbessa Specialized Hospital
Mrs. Redda Seifeldin WHO Country Office, Consultant
Dr. Fekadu Assefa WHO Country Office, Consultant
Mr. Hailegebriel Abomsa Ministry of Health
Mr. Deneke Ayale Ministry of Health
Dr. Atkure Defar Ethiopian Public Health Institute
Mr. Kasu Tola Ministry of Health
Sr. Gezashign Denekew Ministry of Health
Mr. Biruk Kefelegn Ministry of Health
Mr. Biniyam Kemal Ministry of Health
Mr. Sem Daniel Ministry of Health
Dr. Michael Oji WHO County Office
Mr. Mesfin Bekele Ministry of Health
Dr. Negash Seyoum, Jhpiego-Ethiopia
Dr. Bethelihem Tadesse Eka Kotebe General Hospital
Dr. Tsegaye Atsimegiorgis St Peter Specialized Hospital
Mr. Abiy Dawit Ministry of Health
Mr. Habtamu Milkias Ministry of Health
Mr. Zemach Guma ICAP-Ethiopia
Mr. Zinar Nebi JSI Research & Training Institute/L10K
Dr. Ruparelia Chandrakant Jhpiego International

Table of Contents 5
TABLE OF CONTENTS
Foreword......................................................................................................................................... 2
ACKNOWLEDGMENT................................................................................................................. 3
Table of Contents............................................................................................................................ 5
List of Acronyms ............................................................................................................................ 8
Rationale for the Manual .............................................................................................................. 10
Glossary ........................................................................................................................................ 11
Chapter 1: Introduction to Infection Prevention and Control....................................................... 24
Chapter 2: Basic Microbiology for IPC........................................................................................ 36
Chapter 3: Standard and Transmission-Based Precautions .......................................................... 54
Chapter 4: Hand Hygiene.............................................................................................................. 64
Chapter 5: Personal Protective Equipment ................................................................................... 85
Chapter 6: Sharps and Injection Safety....................................................................................... 116
Chapter 7: Decontamination and Reprocessing of Medical Devices (Instrument Processing) .. 139
Chapter 8: Processing Reusable Textiles and Laundry Services................................................ 188
Chapter 9: Environmental Cleaning in Healthcare Setting......................................................... 200
Chapter 10: Healthcare Waste Management............................................................................... 212
Chapter 11: Food and Water Safety............................................................................................ 238
Chapter 12: Facility Design and Patient Flow ............................................................................ 249
Chapter 13: Infection Prevention and Control Aspects of Occupational Health in Healthcare
Settings........................................................................................................................................ 261
Chapter 14: Client Education on Infection Prevention and Control........................................... 289
APPENDICES ............................................................................................................................ 298
Appendix 4A. Sample Hand Hygiene Observation Form: World Health Organization............. 299
Appendix 4B. Sample Hand Hygiene Observation Form Modified for Room Entry and Exit.. 302
Appendix 4C. Implementation of a Multimodal Hand Hygiene Improvement Strategy............ 304
Appendix 13A. Initial Management of a Person Reporting Exposure to Potentially
Infectious Body Fluids................................................................................................................ 308
Appendix 13B. Summary of Steps in Clinical Management of HIV Post- Exposure
Prophylaxis ................................................................................................................................. 309
Appendix 13C. Facilitating Informed Patient Decision Making For HIV Post- Exposure
Prophylaxis ................................................................................................................................. 310
Appendix 13D. Pediatrics PEP Doses ........................................................................................ 311
Appendix 13E. Post Exposure Prophylaxis Follow-Up Card Legend........................................ 312
Appendix 13H. Occupational and Non-Occupational HIV Post Exposure Prophylaxis
Register ....................................................................................................................................... 315
Appendix 13I. PEP Facility Assessment Form........................................................................... 317
Appendix 13J. Checklist for PEP at Site Level PEP Service Delivery ...................................... 319
Appendix 13K. Risk and Work Restrictions for Healthcare Workers Exposed to or Infected
With Infectious Diseases of Importance in Healthcare Settings................................................. 320
Appendix 13L. Decision Making Tools for PEP........................................................................ 334

Table of Contents 6
List of Figures
Figure 1.1 The infection chain...................................................................................................... 27
Figure 1.2.Transmissions of HBV and HIV from patients to HCWs........................................... 29
Figure 1.3. Breaking the chain of infection .................................................................................. 31
Figure 2.1. Structure of a bacterial cell......................................................................................... 38
Figure 2.2. Colony morphology of bacteria.................................................................................. 39
Figure 2.3. Shapes and groupings of bacteria............................................................................... 39
Figure 2.4. Bacterial classification by staining properties............................................................ 40
Figure 2.5. Transmission electron micrograph of EVD................................................................ 42
Figure 2.6. Candida albicans......................................................................................................... 43
Figure 2.7. Plasmodium falciparum, malaria parasite .................................................................. 44
Figure 4.1. The steps for routine handwashing (How to properly wash your hands)................... 67
Figure 4.2. WHO recommendation on how to perform hand hygiene with ABHR..................... 70
Figure 4.3. Five steps of the hand hygiene improvement strategy ............................................... 78
Figure 5.1 Surgical head coverings............................................................................................... 88
Figure 5.2. Different types of eye protection equipment.............................................................. 90
Figure 5.3. Putting on eye protection............................................................................................ 90
Figure 5.4. Taking off eye protection ........................................................................................... 91
Figure 5.5. Types of masks........................................................................................................... 92
Figure 5.6. Coverall suit................................................................................................................ 94
Figure 5.7. A and B. Putting on and removing an isolation gown................................................ 95
Figure 5.8. The glove pyramid...................................................................................................... 99
Figure 5.9. How to don and remove examination gloves ........................................................... 102
Figure 5.10. How to wear (don) sterile gloves............................................................................ 103
Figure 5.11. How to remove (doff) sterile gloves....................................................................... 104
Figure 5.12. Cutting the four fingers off a glove ........................................................................ 106
Figure 6.1. Unsafe injection practices and disease transmission................................................ 119
Figure 6.2. One-handed recap method........................................................................................ 124
Figure 6.3. ONE and ONLY Campaign...................................................................................... 127
Figure 6.4. Breaking open an ampoule ....................................................................................... 131
Figure 6.5. Withdrawing medication using an auto-disable syringe .......................................... 132
Figure 6.6. Standard safety box .................................................................................................. 133
Figure 7.1. Workflow for instrument processing and other medical devices ............................. 141
Figure 7.2. Typical wrapping techniques.................................................................................... 157
Figure 7.3. Steamer used for HLD.............................................................................................. 161
Figure 7.4. Simplified diagram of a gravity displacement steam sterilizer ................................ 167
Figure 7.5. Loading the steam sterilizer...................................................................................... 172
Figure 7.6. Non-electric gravity displacement steam sterilizer .................................................. 175
Figure 9.1: Frequently touched surfaces at health facilities (Examination room)...................... 205
Figure 10.1. Hazardous waste symbols for healthcare facilities................................................. 220
Figure 10.2. Practical classification of hospital wastes and methods of disposal....................... 225
Figure 10.3. Diagram of an autoclave......................................................................................... 227
Figure 10.4. Standard components of a small-scale incinerator ................................................. 229
Figure 10.5. Plan for a small burial pit ....................................................................................... 231
Figure 10.6. Placenta pit plan ..................................................................................................... 233
Figure 12.1. a and b: Floor plans for instrument processing ..................................................... 251

List of Acronyms 7
Figure 12.2. Floor plan for a CSSD in a hospital........................................................................ 257
List of Tables
Table 1.1. WHO core components of IPC .................................................................................... 25
Table 2.1. Basic features of microorganisms and the implications for healthcare ....................... 36
Table 2.2. Microorganisms that cause the four HAIs of global public health interest ................. 48
Table 2.3. Background of the common organisms that cause infection of body systems ............ 50
Table 3.1. Empiric use of transmission-based precautions for isolation of a patient .................. 62
Table 4.1. WHO’s five recommended moments for hand hygiene .............................................. 65
Table 4.2. Hand hygiene observation methods............................................................................. 75
Table 4.3. Advantages and disadvantages of various hand hygiene monitoring approaches....... 76
Table 4.4. Minimum criteria for implementation ......................................................................... 81
Table 5.1. How PPE blocks the spread of microorganisms.......................................................... 86
Table 5.2. Advantages and disadvantages of different types of non-sterile gloves...................... 97
Table 6.1. Conditions causing risks to communities, patients/clients, and providers ................ 117
Table 6.2. Proportion of infections and total burden of disease caused by unsafe injections .... 118
Table 6.3. Right ways to give a safe injection ............................................................................ 121
Table 6.4. Types of injection devices: Advantages and disadvantages ...................................... 126
Table 7.1. Policy for the local decontamination of reusable equipment classification............... 140
Table 7.2. Effectiveness of methods for processing instruments................................................ 151
Table 7.3. Liquid chemicals used for sterilization...................................................................... 179
Table 7.4. Preparing and using chemical disinfectants............................................................... 184
Table 8.1. Recommended PPE for processing textiles ............................................................... 189
Table 8.2. Guidelines for processing textiles and PPE............................................................... 198
Table 10.1. Categories of waste generated by healthcare facilities ............................................ 213
Table 10.2. Healthcare waste from different sources in a healthcare facility............................. 215
Table 10.3. WHO’s recommendations for waste segregation .................................................... 220
Table 10.4. Methods for treating healthcare waste..................................................................... 223
Table 11.1. National standard for drinking water....................................................................... 242
Table 11.2. Sample volume and transportation conditions......................................................... 244
Table 11.3. Sample dechlorination ............................................................................................. 244
Table 11.4. Recommended minimum sample numbers per year for E. coli testing .................. 246
Table 13.3. Occupational health activities for newly employed HCWs..................................... 264
Table 13.2. Occupational health activities for all HCWs ........................................................... 265
Table 13.3. Facility-wide activities............................................................................................. 265
Table 13.4. WHO-recommended immunizations for HCWs...................................................... 266
Table 13.5. Occupational health management of job-related illnesses and exposures............... 267
Table 13.6. Infectious agents of concern for pregnant HCWs according to the risk of
transmission ............................................................................................................................... 269
Table 13.7. Management of occupational exposure to common infections for pregnant staff... 270
Table 13.8. Recommended HIV PEP for percutaneous injuries................................................. 276
Table 13.9. Recommended HIV PEP for mucous membrane exposures and non-intact skin ... 276
Table 13.10. Considerations of non-occupational PEP according to the type of risk exposure. 277
Table 13.11. Recommended PEP for exposure to HBV............................................................. 278
Table 13.12. HIV exposure risk and type of exposure ............................................................... 280
Table 13.13. Determinants of PEP for occupational exposure to HBV...................................... 281
Table 14.1 Topics for IPC client education ................................................................................ 295

List of Acronyms 8
LIST OF ACRONYMS
ABHR Alcohol-Based Hand Rub
AFB Acid-Fast Bacilli
AMR Antimicrobial Resistance
AORN Association of periOperative Registered Nurses
APIC Association for Professionals in Infection Control and Epidemiology
AST Antimicrobial Susceptibility Testing
3TC Lamivudine
ARV Antiretroviral
AZT Zidovudine
CDC Centers for Disease Control and Prevention
CJD Creutzfeldt-Jakob Disease
CMV Cytomegalovirus
CRE Carbapenem-Resistant Enterobacteriaceae
CSSD Central Sterile Supply Department
DHHS Department of Health and Human Services
DMPA Depot Medroxyprogesterone Acetate
DNA Deoxyribonucleic Acid
EC Exposure Code
EFDA Ethiopian Food and Drug Administration
EFV Efavirenez
EPI Expanded Programme on Immunization
ETO Ethylene Oxide
EVD Ebola Virus Disease
FDA United States Food and Drug Administration
FMOH Federal Ministry of Health
H2O2 Hydrogen Peroxide
HAI Healthcare-Associated/Acquired Infection
HAV Hepatitis A Virus
HBeAg Hepatitis B Envelope Antigen
HBsAg Hepatitis B Surface Antigen
HBIG Hepatitis B immune globulin
HBV Hepatitis B Virus
HCP Healthcare Provider
HCV Hepatitis C Virus
HCW Healthcare Worker
HCWM Healthcare Waste Management
HLD High-Level Disinfection
ICU Intensive Care Unit
IP Infection Prevention
IPC Infection Prevention and Control
IUD Intrauterine Device

List of Acronyms 9
IV Intravenous
MDT Multi-Disciplinary Team
MERS-CoV Middle East Respiratory Syndrome-coronavirus
MRN Medical Record Number
MRSA Methicillin-Resistant S. aureus
MTaPS Medicines, Technologies, and Pharmaceutical Services
MVA Manual Vacuum Aspiration
nPEP Non-Occupational Post-Exposure Prophylaxis
OPA Orthophthalaldehyde
OSHA Occupational Safety & Health Administration
PCR Polymerase Chain Reaction
PEP Post-Exposure Prophylaxis
PPE Personal Protective Equipment
ppm Parts Per Million
PS Patient Safety
QUAT Quaternary Ammonium Compound
RNA Ribonucleic Acid
RSV Respiratory Syncytial Virus
SARS-CoV Severe Acute Respiratory Syndrome-Associated Coronavirus
SC Status Code
SEARO South East Asia Regional Office
SHEA Society of Healthcare Epidemiology of America
SOP Standard Operating Procedure
SSI Surgical Site Infection
TB Tuberculosis
TDF Tenofovir
μm Micrometer
UP Universal Precautions
USAID United States Agency for International Development
UV Ultraviolet
VHF Viral Hemorrhagic Fever
VRE Vancomycin-Resistant Enterococci
WASH Water, Sanitation, and Hygiene
WHO World Health Organizatio
n

Rationale for the Manual 10
RATIONALE FOR THE MANUAL
Since the publication of the Infection Prevention Guidelines for Health Care Facilities in Ethiopia
published in July 2004, and the first edition of the National Infection Prevention and Patient Safety
Guidelines in 2011 and the second edition in 2012, considerable progress has been made in
understanding and implementing evidence-based IPC practices in healthcare facilities. However,
the recommended evidence-based global practices are continually modified in response to new
scientific findings. As a result, the 2012 edition of the National Infection Prevention and Patient
Safety Guidelines lacked updated information and were inadequate in some important areas.
Moreover, the existing guidelines comprised two vast but interrelated programs (Infection
Prevention and Patient Safety). This calls for separating infection prevention (IP) from patient
safety (PS), updating the guidelines, and preparing a comprehensive Infection Prevention and
Control Reference Manual for Healthcare Facilities in Ethiopia that will provide in-depth
information on IPC. The revised manual will be used in conjunction with other guidelines, such as
the Ethiopian Hospital Services Transformation Guidelines, National Healthcare Waste
Management Guidelines, and other similar documents.
Significant efforts have been made to update information and practical interventions in IPC areas
of serious concerns. All chapters in this manual have been revised. Additional topics, such as
AMR, prevention of common healthcare-associated/acquired infections (HAIs), IPC in outbreak
management, basic surveillance and biostatistics, basic microbiology, IPC in special settings, and
other issues, have been included. This manual provides practitioners with the most appropriate
recommendations for IPC activities, placing more emphasis on practices and procedures that are
applicable to the country.
The manual is divided in two volumes: Volume I covers general IPC and Volume II addresses
more advanced IPC and special settings. The document serves as a standardized IPC reference
manual for healthcare providers and managers in all government, private, and nongovernmental
healthcare delivery systems. It is also an important resource for health educators, trainers, and
public health and medical officials. It is likewise relevant to preservice education, group-based
training, and on-the-job learning.
The FMOH revitalized the national IPC Advisory Technical Working Group in 2019 under the
Medical Services General Directorate. The Advisory Technical Working Group identified gaps
in the IPC program and practices and took the initiative to review the existing IP- and PS-
related documents to develop this IPC manual.

Glossary 11
GLOSSARY
Alcohol-based hand rub (ABHR) is a fast-acting, antiseptic hand rub that does not require water
to reduce resident flora, kills transient flora on the hands, and has the potential to protect the skin
(depending on the ingredients).
Administrative controls, also known as “work practice controls,” are changes in work
procedures, such as written policies, rules, protocols, supervision, schedules, and training, with the
goal of reducing the duration, frequency, and severity of exposure to hazardous situations and
substances (e.g., blood, body fluids, and chemicals).
Airborne transmission is the spread of an infectious agent carried through the air by particles
smaller than five micrometers (µm) in size.
Antibody is a microscopic structure, called an immunoglobulin, produced by the immune system,
which is the system that defends the body from infection. Antibodies can be found in blood and
other body fluids.
Antigens are foreign molecules, such as toxins, viruses, or bacteria that stimulate the body’s
immune system to produce antibodies.
Antimicrobial resistance occurs when microorganisms, such as bacteria, viruses, fungi, and
parasites, develop ways to avoid the effects of medications used to treat infections (such as
antibiotics, antivirals, and antifungals), and pass these changes on to their offspring, or in some
cases to other bacteria via plasmids. Mechanisms can include the production of substances that
inactivate the drug, an alteration in cell structure that prevents the drug from binding with the cell,
or the ability to pump the drug out of the cell. Resistance develops by changes in existing genes or
by acquisition of new genes (such as from plasmids).
Antimicrobial susceptibility testing (AST) measures the activity of one or more antimicrobial
agents against a microorganism isolated from a sample to determine potential susceptibility or
resistance to antimicrobials. It helps the prescriber determine which antimicrobial will be most
successful in treating a patient with a specific infection. The type and extent of the AST conducted
depends on the organism isolated, the source of the culture (body site), available antimicrobial
agents, and typical susceptibility patterns.
Antiseptic agents or antimicrobial soap (terms used interchangeably) are chemicals applied to
the skin or other living tissue to inhibit or kill microorganisms (both transient and resident). These
agents, which include alcohol (ethyl or isopropyl), dilute iodine solutions, iodophors,
chlorhexidine, and triclosan, are used to reduce the total bacterial count.
Antiseptic handwashing is washing hands with soap and water or with products containing an
antiseptic agent.
At point of use: equipment, instruments, and supply items are at the place where needed (e.g.,
sharps containers are placed within arm’s reach of where injections are being given).

Glossary 12
Bioburden is the population of viable microorganisms on devices, instruments, equipment, or
products. When measured, bioburden is expressed as the total count of bacterial and fungal colony-
forming units per single item.
Biofilm is an accumulated, thin layer of bacteria and extracellular material that tightly adheres to
surfaces (e.g., skin drains, urinary catheters) and cannot be easily removed. The presence of
biofilm can increase the resistance of the bacteria to antimicrobial drugs, and reduce the
effectiveness of disinfectants and sterilization because the products cannot penetrate the surface.
Bloodborne pathogens are infectious microorganisms (bacteria, viruses, and other
microorganisms) contained in blood and other potentially infectious body fluids (including urine,
respiratory secretions, cerebrospinal, peritoneal, pleural, pericardial, and synovial amniotic fluids,
semen, vaginal secretions, breast milk, and saliva). The pathogens of primary concern are HBV,
HCV, and HIV.
Clean water is natural or chemically treated or filtered water that is safe to drink and use for other
purposes (e.g., handwashing and general medical use) because it meets national public health
standards and WHO guidelines for drinking-water quality.
Cleaning is the removal of visible dirt (e.g., organic and inorganic material) from objects and
surfaces, normally accomplished manually or mechanically, using water with detergents or
enzymatic cleaners. Cleaning is required before high-level disinfection (HLD) or sterilization
because tissue, blood, body fluids, dirt, and debris reduce the effectiveness of these processes.
Cleaning solution is any combination of soap (or detergent) and water, with or without a chemical
disinfectant, used to wash or wipe down surfaces, such as floors, chairs, bench tops, walls, and
ceilings (environmental surfaces).
Medical instruments cleaning: The first step required to physically remove contamination by a
foreign material. It will also remove organic matter, such a blood and microorganisms, to prepare
a surgical instrument or equipment for disinfection or sterilization.
Cohorting is the practice of placing patients with the same infectious disease (e.g., measles,
influenza) or colonization (e.g., multidrug-resistant organisms) but no other infection, in proximity
(e.g., the same room, the same ward, or the same area of a ward).
Colonization: The presence of pathogenic (illness or disease-causing) organisms in a person or
animal in abundance (i.e., they can be detected by cultures or other tests) usually without causing
symptoms or clinical findings (i.e., they do not invade tissues, cause cellular changes, or cause
damage). In other words, it is the appearance or increased number of a particular invasive bacterial
species in the resident microflora.
Colonized persons can be a major source of the transfer of pathogens to other people. For
example, Neisseria meningitides colonize the nasal cavity and oropharynx with or without causing
subsequent infections. Entamoeba histolytica can colonize the large bowel without any harm
to the host but are often shed in the stool as infectious cysts, which may cause dysentery.

Glossary 13
Colony (bacterial colony) is a cluster of identical microorganisms growing on the surface of or
within a solid medium, presumably cultured from a single cell.
Combustible wastes are those that can be burned or will easily catch on fire. They include paper,
cardboard, and used dressings, gauze, and some liquids and gases.
Contact time is the length of time a cleaning product must remain wet on the surface being cleaned
for the disinfectant to kill the targeted microorganisms. Time of contact varies depending on the
type of cleaning product and the targeted microorganism (e.g., bacteria, viruses, mycobacteria,
spores). For use in healthcare facilities, the contact time for the organism that is most difficult to
kill is routinely adopted.
Contact transmission occurs when infectious agents/pathogens (e.g., bacteria, viruses, fungi,
parasites) are transmitted directly or indirectly from one infected or colonized individual to a
susceptible host. This can occur through physical contact (e.g., touching) with the infected
individual or with contaminated equipment/environmental surfaces. Infectious agents/pathogens
can often survive on physical surfaces from several hours up to several months.
Cytotoxic waste contains by-products of drugs that kill dividing cells, used for treatment of certain
cancers. It also includes waste materials that can damage human genes (e.g., DNA) and may cause
cancers or congenital deformities in babies. This waste can include any items exposed to these
drugs, including sharps, personal protective equipment (PPE), and body fluids.
Decontamination: Removes soil and pathogenic microorganisms from objects so that they are
safe to handle, subject to further processing, use, or discard.
Detergent (term is used interchangeably with soap) is a cleaning product (e.g., bar, liquid, leaflet,
or powder) that lowers surface tension of water, thereby helping to remove dirt and debris. Plain
soaps do not claim to be antimicrobial on their label and require friction (i.e., scrubbing) to
mechanically remove microorganisms. Antiseptic (antimicrobial) soaps do kill or inhibit the
growth of some microorganisms, but not all.
Disease is any deviation from being healthy or the interruption of the normal structure or function
of any body part, organ, or system manifested by a characteristic set of symptoms and signs whose
etiology, pathology, and prognosis may be known or unknown.
Disinfectant cleaning solution is a product that is a combination of detergent (soap) and a
chemical disinfectant. It is true that not all detergents and disinfectants are compatible.
However, there is still a range of several combinations, such as alkaline detergents with chlorine
compounds, alkaline detergents with quaternary ammonium compounds (QUATs) or other
nonionic surfactants, and acid detergents with i odophors that are available commercially or
can be prepared.
Disinfectant is a chemical that destroys or inactivates microorganisms on inanimate (non-living)
objects. Disinfectants are classified as low-, intermediate-, or high-level depending on their ability
to kill or inactivate some (low- or intermediate-level) or all (high-level) microorganisms. Although
disinfectants may kill all microorganisms, they do not kill all spores. Commonly used disinfectants

Glossary 14
for low-, intermediate-level cleaning include phenols, chlorine, or chlorine-containing compounds,
and QUAT and H2O2. These classes of disinfectants are often used to clean frequently touched
surfaces in healthcare facilities.
Disposal is the final step in healthcare waste management. It entails the intentional treatment of
waste to render it harmless, followed by burial, deposit, discharge, dumping, placement, or release
of waste material into the air or water or onto/into land. It is undertaken without the intention of
retrieval/reuse.
DNA, deoxyribonucleic acid, is the hereditary material for all living organisms; it contains the
instructions that make each type of living creature unique. DNA is the substance in the genes that
is organized into the chromosomes in the cells, determines particular characteristics, and allows
these characteristics to be passed from parents to offspring.
Droplet nuclei are small particles involved in airborne transmission of pathogen-containing
respiratory secretions expelled into the air by coughing. They are reduced by evaporation to small,
dry particles that can remain airborne for long periods of time and distance.
Droplet transmission occurs when infectious droplets larger than five µm in size are spread and
land directly on or come in contact with a susceptible host’s mucous membranes of the nose or
mouth or conjunctivae of the eye. Droplets can be produced by coughing, sneezing, talking, or
during procedures (e.g., bronchoscopy or suctioning). Due to their size, particles remain airborne
briefly and can travel about one meter (three feet) or less. Droplet transmission requires close
proximity or contact between the source and the susceptible host. Droplets may also land on
surfaces and then be transferred by contact transmission.
Emollient is an organic agent (e.g., glycerol, propylene glycol, or sorbitol) that is added to ABHR to
soften the skin and help prevent skin damage (e.g., cracking, drying, irritation, and dermatitis) that is
often caused by frequent hand hygiene.
Empiric in the context of health services refers to an action, intervention, or practice being
implemented on the basis of a clinical educated guess, based on experience and in the absence of
laboratory test results for specific diagnosis. The empiric action, intervention, or practice is
continued until the definitive diagnosis is made.
Empowerment: WHO defines empowerment as a process through which people gain greater
control over decisions and actions affecting their health and should be seen both as an individual
and a community process.
Encapsulation is a process used when other options for safe disposal are not available. It involves
surrounding hazardous waste with an immobilizing agent in sealed, solid waste containers to
reduce the likelihood of future environmental, scavenger, or human contact with waste.
Endogenous infection is caused by organisms normally present in an individual’s body (normal
flora or colonizing organisms).
Engineering controls are methods that are built into the design of the environment, equipment,
or a process to minimize the hazards associated with use. An example is a medical device or piece

Glossary 15
of equipment that limits exposure to bloodborne pathogens in the workplace, such as sharps
disposal containers, self-sheathing needles (a barrel or cover that automatically slides over the
needle and locks in place once the needle has been removed from the patient), sharps with injury
protection, and needleless systems.
Environmental cleaning in healthcare facilities refers to the general cleaning of surfaces and
equipment to reduce the number of microorganisms present, and providing a clean and pleasant
atmosphere.
Environmental controls are activities of keeping standards specifying procedures to be followed
for the routine care, cleaning, and disinfection of surfaces, beds, bedrails, bedside equipment, and
other frequently touched surfaces.
Exogenous infection is caused by organisms from a source outside the individual’s body.
Exposed person is the person who is potentially at risk of acquiring HIV infection (and or
infection from other pathogens) through exposure to blood or body fluids in his or her occupation
or in another non-occupational situation.
Foodborne or waterborne illness is any disease of an infectious or toxic nature caused by
ingestion of food or water.
Frequently touched surfaces are surfaces in patient care areas in the healthcare facility with
frequent hand contact. These surfaces include door handles, light switches, countertops, bedrails
and ends of beds, patient charts, tap handles, handrails, toilet flushes, rounding and medical
trolleys/carts, buttons on monitors, telephones, and call bells.
General waste does not pose any particular biological, chemical, radioactive, or physical hazard
(e.g., paper boxes, newspapers, magazines, polyethylene bottles, polyester bags, wood, other
papers, metals [e.g., aluminum cans and containers], high-density polyethylene [e.g., milk
containers, saline bottles], glass, and construction/demolition materials).
HAI is an infection that occurs in a patient as a result of care at a healthcare facility and was not
present at the time of arrival at the facility. To be considered an HAI, the infection must begin on
or after the third day of admission to the healthcare facility (the day of admission is Day 1) or on
the day of or the day after discharge from the facility. The term “healthcare associated/acquired
infection” replaces the formerly used “nosocomial” or “hospital” infection because evidence has
shown that these infections can affect patients in any setting where they receive healthcare.
Hand disinfection is a term that WHO does not recommend using because disinfection normally
refers to the decontamination of non-living surfaces and objects.
Hand hygiene is the process of removing soil, debris, and microbes by cleansing the hands using soap
and water, ABHR, antiseptic agents, or antimicrobial soap.
Handwashing is the process of mechanically removing soil, debris, and transient flora from the hands
using soap and clean water.

Glossary 16
Hazard: Anything (e.g., condition, situation, practice, behavior) that has the potential to cause
harm, including injury, disease, death, environmental, property and equipment damage. A hazard
can be a thing or a situation.
Hazardous waste is waste that can pose a health risk to HCWs, patients, and other people who
are exposed to it. It includes both chemical/radioactive and infectious healthcare waste, for
example, sharps, pathological waste, pharmaceutical waste, and cytotoxic, chemical, and
radioactive waste.
Healthcare worker (HCW), in this manual, is someone who works in a healthcare facility, and
provides healthcare and services to people, either directly or indirectly, such as a clinician, nurse,
midwife, aide, helper, laboratory or x-ray technician, cleaner, or waste handler.
Healthcare textiles are made from woven textile materials, either natural or synthetic fibers, or a
mix of fibers, and material prepared from non-woven fibers. These textiles can be either single-
use or reusable items, and are used to make uniforms, PPE, surgical drapes, bed sheets, and other
items. They are generally referred to as textiles in healthcare facilities.
Healthcare wastewater is any water that has been adversely affected in quality during the
provision of healthcare services. It is mainly liquid waste containing some solids produced by staff
and patients (i.e., human excrement) or during healthcare-related processes, or cooking, cleaning,
and laundering at the healthcare facility. This type of wastewater poses risks similar to those of
domestic wastewater, which is considered infectious. However, healthcare facilities (depending
on the services offered) also generate wastewater that poses a higher risk, containing chemicals,
pharmaceuticals, contagious microorganisms, and radioactive substances.
Healthcare-associated diarrhea is diarrhea that begins on or after the third calendar day of
hospitalization (the day of hospital admission is Day 1).
Healthcare-associated infection is an infection that occurs in a patient as a result of care at a
healthcare facility and that was not present at the time of arrival at the facility. To be considered
an HAI, the infection must begin on or after the third day of admission to the healthcare facility
(the day of admission is Day 1) or on the day of or the day after discharge from the facility. The
term “healthcare-associated infection” replaces the formerly used “nosocomial” or “hospital”
infection because evidence has shown that these infections can affect patients in any setting where
they receive healthcare.
High-level disinfection is a process that kills all microorganisms but not necessarily high numbers
of bacterial spores. HLD is achieved by soaking items in liquid chemicals classified as HLDs or
by boiling or steaming for the appropriate time (20 minutes).
Incineration is one method of waste disposal and involves controlled burning of solid, liquid, or
gaseous combustible wastes that result in inorganic, non-combustible residue.
Infection is an invasion and multiplication of microorganisms in body tissues that may be
clinically apparent or result in local cellular injury due to competitive metabolism, toxins,
intracellular replication, or antigen antibody response.

Glossary 17
Infection prevention and control refers to scientifically sound practices aimed at preventing
harm caused by infection to patients, health workers, and the community. It is a systematic effort
or process of placing barriers between a susceptible host (a person lacking effective natural or
acquired protection) and infectious agents. IPC is used interchangeably with IP in this manual.
Infectious microorganisms are microorganisms capable of producing disease in the appropriate
hosts. They are also called infectious agents, pathogens, or pathogenic agents interchangeably in
this manual.
Infectious waste is waste that is potentially contaminated with blood, body fluids, or pathogenic
organisms, including, but not limited to, laboratory cultures, microbiological stocks, excreta, and
items soiled with blood or body fluids.
Injection safety is a set of techniques used to perform injections in an optimally safe manner for
patients and HCWs during patient care.
Instrument processing areas are places anywhere in the healthcare facility where soiled
instruments, equipment, and other items are cleaned and processed by means of either HLD or
sterilization.
Intermediate-level disinfection is a process that destroys all vegetative bacteria, including
tuberculosis bacilli, all fungi, and most viruses (except some non-lipid viruses) but not bacterial
spores. Intermediate-level disinfection is carried out using chemicals that have been approved as
intermediate-level disinfectants or those that are approved as “tuberculocidal” in the national IPC
guidelines.
Log10 reduction and kill rate is a quantitative (calculable) measurement describing the
percentage of contaminants killed during instrument processing procedures. 1 log10 reduction
means a 90% reduction in microbes on a given surface. For example, if there are 1 million microbes
on a surface, 1 log10 reduction or kill rate will remove 90% of 1 million microbes, 2 log10
reduction or kill rate will remove 99% of microbes, and 5 log10 reduction or kill rate will remove
99.999%. Therefore, a 6 log10 reduction or kill rate will remove 99.9999% of microbes, which
means that only 1 microbe will survive at the end of the procedure that has a kill rate of 6 log10
reductions.
Low-level disinfection is a process that destroys all vegetative bacteria (except tuberculosis
bacilli), lipid viruses, some non-lipid viruses, and some fungi, but not bacterial spores. Low-level
disinfection is carried out using chemicals that have been approved to achieve low-level
disinfection.
Microorganisms are any living organisms, such as bacteria, protozoa, or fungi that cannot be seen
with the naked eye. Microorganisms can only be viewed through a microscope.
Multi-dose vial is a vial of liquid medication intended for parenteral administration (injection or
infusion) that the manufacturer has prepared to contain more than one dose of a medication. Multi-
dose vials are labeled as such by the manufacturer and typically contain an antimicrobial

Glossary 18
preservative to help prevent the growth of bacteria. The preservative has no effect on viruses and
does not protect against contamination when HCWs fail to follow safe injection practices.
Municipal waste is general waste that is generated mainly by households, commercial activities,
and street-sweeping. Ideally, it is collected by municipalities (e.g., local villages or cities) but in
some locations this service is not available.
Non-critical items, for the purposes of cleaning and disinfection, are items that come into contact
with intact skin but not with mucous membranes (e.g., blood pressure cuffs, stethoscopes, and
crutches). Most can be cleaned and disinfected at the point of use using a low-level disinfectant.
Nonoccupational exposure is an exposure to HIV and other bloodborne pathogens outside the
work setting. This term predominantly refers to potential exposure through sexual assault. Other
forms of potential non-occupational exposure include those arising from needle-sharing among
injecting drug users, consensual sex, needle sticks in the community, fights or playground
incidents resulting in bleeding by an HIV-infected child, and mass causalities, such as road traffic
accidents, etc.
Normal flora/commensal bacteria are microorganisms (usually bacteria and fungi) that are
naturally present in and on healthy people (e.g., on the skin or in the gut, or reproductive or
respiratory tract).
Occupational exposure is the exposure of an HCW to an infection while providing care and
treatment services to patients in a healthcare facility.
Occupational health activities include all aspects of work-related health and safety activities,
including prevention. The term refers in particular to activities that address infectious hazards at
healthcare facilities.
Occupational health is the discipline that deals with all aspects of work-related health and safety
and has a strong focus on prevention; it is also known as employee health.
Occupational health surveillance is the collection, analysis, and dissemination of data on hazards
that have endangered or may endanger HCWs.
Occupational infection is an infection contracted as a result of an exposure to risk factors arising
from work activity.
Occupational injury or infection is an injury or infection acquired by healthcare staff while
performing their normal duties.
Operating room is an area or space where surgical procedures are performed.
Opportunistic infection is an infection caused by a microorganism that under normal
circumstances does not cause disease but becomes pathogenic when the body’s immune system is
impaired and unable to fight off infection, or antibiotic therapy allows for overgrowth of some
microorganisms (such as yeast in the gastrointestinal and reproductive tracts).

Glossary 19
Pasteurization is a disinfection process that uses hot water at temperatures of 65–77 °C (149–
170.6 °F) for a contact time of at least 30 minutes to kill or markedly reduce the number of
microorganisms other than bacterial spores.
Patient/client education is defined as a systematized process of transfer of knowledge, skills, and
attitudes that empower the patient, family, caregiver, and community to actively participate in the
promotion and maintenance of a safe healthcare facility environment.
Persistent activity is prolonged or extended protective activity that prevents the growth or survival
of microorganisms after application of an antiseptic; it is also called “residual” activity.
Plasmids are genetic structures in a cell, typically a small, circular DNA strand in the cytoplasm
of a bacterium or protozoan independent of the chromosomes. They are relevant for IPC because
they enable AMR to pass from one genus of bacteria to another.
Point of care is the place where three elements come together: the patient, the HCW, and the care or
treatment involving contact with the patient or the surrounding environment. The concept embraces
the need to perform hand hygiene at recommended moments exactly where care delivery takes place.
This requires that a hand hygiene product (e.g., ABHR) be easily accessible and as close as possible—
within arm’s reach—to where patient care or treatment is provided.
Point of use refers to a place and time where equipment, instruments, and supplies are used on
patients (e.g., the patients’ bedsides, procedure rooms, delivery rooms, operating theaters).
Polymerase chain reaction (PCR) is a type of molecular test in which genetic material
(DNA/RNA) is extracted from the sample and through complex techniques is duplicated or
amplified until there is a large enough amount to test the DNA, RNA, or protein sequences and
identify specific microorganisms.
Post-exposure prophylaxis (PEP) is a preventive medical treatment for which a person may
qualify following potential exposure to a disease-causing pathogen, such as HIV or HBV, to
prevent becoming infected.
PPE items are the protective barriers and respirators used alone or in combination by a HCW to
protect mucous membranes, airways, skin, and clothing from contact with harmful or infectious
agents. PPE may also be used on an infectious patient to prevent the spread of infectious agents
(e.g., surgical mask worn by a patient during transport to control the spread of illness).
Procedure areas are areas where patients are examined and patient care procedures (e.g., pelvic
examinations, wound care management, blood drawing, immunizations, IUD insertions and
removals, and normal childbirth) are performed.
Protective barriers are physical, mechanical, or chemical processes that help prevent the spread
of infectious agents from person to person (patient, healthcare client, or health workers) and/or
equipment, instruments, and environmental surfaces to people.
Residence time is the time that it takes between the entry of a waste substance into a furnace or
incinerator and the exit of exhaust gases or burn-out residue from the furnace or incinerator.

Glossary 20
Resident flora are microorganisms that live in the deeper layers of the skin and in hair follicles, and
they cannot be completely removed, even by vigorous washing and rinsing with plain soap and clean
water. In most cases, resident flora are not likely to be associated with infections; however, the hands
or fingernails of some HCWs can become colonized by microorganisms that do cause infection (e.g.,
Staphylococcus aureus, gram-negative bacilli, or yeast), which can be transmitted to patients.
Respirator fit testing is a test protocol conducted to verify that a respirator is both comfortable
and correctly fits the user without leakage. Fit testing uses a test agent, either qualitatively detected
by the wearer’s sense of taste, smell, or involuntary cough (irritant smoke), or quantitatively
measured by an instrument to verify the respirator’s fit. The benefits of this testing include better
protection for the HCW/user and verification that the user is wearing a correctly fitting model and
size of respirator.
Respiratory hygiene/cough etiquette are measures taken to prevent transmission of respiratory
infections, including influenza, in healthcare facilities. They involve maintaining at least a one-
meter (three-foot) distance from other individuals in common waiting areas, covering the
mouth/nose when sneezing/coughing, performing hand hygiene after soiling hands with
respiratory secretions, and placing visual alerts to remind HCWs, patients, and visitors to practice
respiratory hygiene and cough etiquette.
Risk: The likelihood or possibility that harm (injury, illness, death, damage, etc.) may occur from
exposure to a hazard.
RNA, ribonucleic acid, is present in all living cells and many viruses. RNA molecules are involved
in protein synthesis and sometimes in the transmission of genetic information.
Safe injection is one that does not harm the recipient, does not expose the HCW to any avoidable
risks, is provided by a skilled person using appropriate injection equipment, and does not result in
waste that is dangerous for the community.
Sanitary landfill is an engineering method used for disposing of solid waste on land in a manner
that protects the environment (e.g., by spreading the waste in thin layers, compacting it to the
smallest practical volume, and then covering it with soil at the end of each workday).
Sanitizer is a chemical that reduces the number of bacterial contaminants on inanimate objects to
safe levels based on public health requirements (i.e., a chemical that kills 99.999% of the specific
test bacteria in 30 seconds under the conditions of the test). It is used in food service but not for
cleaning surfaces in healthcare facilities.
Scrubbing (frictional cleaning) is the vigorous rubbing of a surface with a brush or other tool.
This is the best way to physically remove dirt, debris, and microorganisms.
Seal check is a procedure conducted by the wearer of a particulate respirator to determine whether
the respirator is properly sealed to the face. The user seal check can be either a positive pressure
check (i.e., breathing out to check for leak on exhalation), or negative pressure check (i.e.,
breathing in to check for leak on inhalation), or both.

Glossary 21
Sewerage is the system for the collection and transport of human excrement and accompanying
water used in toilet systems (sewage). The system includes conduits (channels), pipes (sewers),
and pumping stations.
Sharps are instruments, needles, and any other objects that can easily penetrate through the skin.
Sharps injuries are injuries from a “sharp” penetrating the skin. “Sharps” include syringe needles,
scalpels, broken glass, and other objects that may be contaminated with blood or body fluids. These
injuries potentially expose HCWs to infections from bloodborne pathogens.
Sharps injury prevention strategies are measures taken to prevent injuries when handling sharps.
These measures include elimination of hazards, and the use of engineering controls, administrative
controls, workspace practices, and PPE.
Sharps safety and needle safety are procedures used to handle needles and other sharp devices
in a manner that will prevent injury and exposure from infectious agents during routine patient
care.
Sharps waste includes used or unused sharps (e.g., hypodermic, intravenous, or other needles,
auto-disable syringes, syringes with attached needles, infusion sets, scalpels, pipettes, knives,
blades, and broken glass).
Single-use or single-dose vial is a vial of liquid medication intended for parenteral administration
(injection or infusion) that is meant for use in a single patient for a single case/procedure/injection.
Single-use or single-dose vials are labeled as such by the manufacturer and do not contain
antimicrobial preservative.
Soap (term is used interchangeably with detergent) is a cleaning product (e.g., bar, liquid, leaflet, or
powder) that lowers surface tension of water, thereby helping to remove dirt and debris. Plain soaps
do not claim to be antimicrobial on their labels and require friction (i.e., scrubbing) to mechanically
remove microorganisms. Antiseptic (antimicrobial) soaps kill or inhibits the growth of most
microorganisms.
Soaps and detergents (terms used interchangeably) are cleaning products (bar, liquid, leaflet,
or powder) that lower surface tension, thereby helping remove dirt, debris, and transient
microorganisms from hands, utensils, equipment, etc.
Soiled or contaminated textile is a cloth item coming from multiple sources in a hospital or clinic
that has been collected and brought to the laundry for processing.
Sorting is a process of inspecting and removing foreign and, in some cases, dangerous objects
(e.g., sharps or broken glass) from soiled textiles before washing. This step is extremely important
because soiled textiles from the operating room or clinic have occasionally been found to contain
sharps (e.g., scalpels, sharp-tipped scissors, hypodermic and suture needles, and towel clips).
Source person is the person who is (either identified or not identified as) the possible source of
contamination through potentially infectious blood or body fluid. If the serostatus of the source

Glossary 22
person is unknown, he or she may be asked to provide informed consent to HIV testing. The source
person may be a patient if an HCW is the one who is exposed (in occupational exposure).
Species refers to the taxonomic/biological classification system of microorganism; all species have
a two-part name, called a binomial (e.g., Staphylococcus aureus). The first name is the generic
name— genus—(e.g., Staphylococcus), the second name is the species (e.g., aureus), based on
structural and biochemical characteristics. A species can have different strains and subgroups that
can cause different diseases. Some organisms of medical interest are classified below the species
level, based on their characteristics (e.g., Escherichia coli O157:H7, a strain that produces Shiga-
like toxin).
Staining is a technique that uses dyes to color the cell wall of bacteria to quickly identify it in a
broad group of bacteria. Staining methods involve fixing bacteria cells to a glass slide and then
staining and washing them with a dye and alcohol. The differing characteristics of a
microorganism’s cell wall cause the stain to be retained in the cell or not, resulting in color
changes. For example, Gram stain is used to differentiate bacteria into two groups, gram positive
and gram negative; acid-fast stain is used to identify Mycobacterium tuberculosis.
Standard precautions are a set of infection control practices used for every patient encounter to
reduce the risk of transmission of bloodborne and other pathogens from both recognized and
unrecognized sources. They are the basic level of infection control practices to be used, at a
minimum, in preventing the spread of infectious agents to all individuals in the healthcare facility.
Sterilants are chemicals used to destroy all forms of microorganisms, including endospores. Most
sterilants are also HLDs when used for a shorter period of time. These chemicals are applied only
on inanimate objects (e.g., surgical instruments) that are used in semi-critical and critical areas (e.g.,
surgery). It should be noted that they are not meant to be used for cleaning environmental surfaces.
Sterilization: A process that eliminates all microorganisms (bacteria, viruses, fungi, and
parasites), including bacterial endospores, from inanimate objects by high-pressure steam
(autoclave), dry heat (oven), chemical sterilization, or radiation.
Strain is a variation in members of the same bacterial species. For treatment and epidemiology, it
may be helpful for clinical laboratories to distinguish between strains in the same species. For
example, some strains of E. coli are harmless and play an important role in the human intestinal
tract, but other strains can cause diarrhea. Tests, such as PCR, can identify strains.
Surfactant is an agent that reduces the surface tension of water, or the tension at the interface
between water and another liquid, and a wetting agent found in many sterilants and disinfectants.
Surgical hand preparation refers to the protocol used preoperatively by surgical teams to
eliminate transient flora and reduce resident skin flora. The process involves an antiseptic
handwash or antiseptic hand rub and rubbing/scrubbing for specific amounts of time using specific
techniques before putting on gloves. Antiseptics used for surgical hand preparation often have
persistent antimicrobial activity.
Surgical hand scrub refers to surgical hand preparation with antimicrobial soap and water.

Glossary 23
Surgical unit is a whole surgical area including lockers and dressing rooms; preoperative and
recovery rooms; peripheral support areas, including storage space for sterile and high-level
disinfected items; other consumable supplies and corridors leading to restricted areas; the
operating room(s); scrub sink areas; and the nursing station.
Syndromic approach is an approach that bases preventive actions on a set of signs and symptoms
that are suggestive of a clinical condition rather than a specific diagnosis. The symptoms could be
related to multiple systems or organs.
Terminal or discharge cleaning is the process used to clean a patient’s room after the patient has
been discharged or transferred or to clean patient treatment areas, including operating theaters at
the end of the day.
Textiles are cloth items used in healthcare facilities by housekeeping staff (bedding and towels),
cleaning staff (cleaning cloths, gowns, and caps), and surgical personnel (caps, masks, scrub
suits, surgical gowns, drapes, and wrappers) and staff of specialty units, such as intensive care
units (ICUs) and other units, performing invasive medical procedures (e.g., anesthesiology,
radiology, or cardiology).
Transient flora are microorganisms acquired through contact with individuals or contaminated
surfaces during the course of normal, daily activities. They live in the upper layers of the skin and
are more amenable to removal by hand hygiene. They are the microorganisms most likely to cause
HAIs.
Transmission-based precautions are the second tier of basic infection control and are to be used
in addition to standard precautions for patients who may be infected or colonized with certain
infectious agents for which additional precautions are needed to prevent infection transmission.
Vaccine-preventable diseases are infectious diseases for which effective vaccines are available.
They include but are not limited to HAV and HBV, influenza, measles, mumps, rubella, tetanus,
diphtheria, pertussis, and varicella (chicken pox).
Waste management includes all activities—administrative and operational (including
transportation activities)—involved in the handling of waste: generation, collection, transport,
storage, and disposal of waste.
Waste segregation is the systematic separation of healthcare waste into designated categories
according to the type of composition and hazards to enhance the safety and efficiency of waste
handling and disposal.
Water-based diseases are those transmitted through aquatic vectors (such as schistosomiasis).
Waterborne diseases are those transmitted through drinking water contamination (such as
typhoid, cholera, gastroenteritis, etc.).
Water-related diseases are those spread by insects that depend on water (malaria and yellow fever).
Water-washed diseases are those diseases caused by the shortage of adequate water for personal
hygiene.

Chapter 1: Introduction to Infection Prevention and Control 24
CHAPTER 1: INTRODUCTION TO INFECTION PREVENTION
AND CONTROL
Key Topics
• Goal of IPC
• WHO core components of IPC
• The infection chain/cycle and breaking the chain of infection
• Introduction to HAIs
• Background on standard precautions and transmission-based precautions
• Background on clean and asepsis techniques
BACKGROUND
IPC is essential for the delivery of safe and quality healthcare services. Infections are a major
health threat globally. They can affect anyone. HCWs have a critical role to play in the prevention
and control of infections at all levels of care. The nature of their work increases their chances of
acquiring or transmitting infectious agents. In healthcare settings, the risk for infection is usually
high due to such factors as the presence of a wide range of infectious agents (including resistant
strains) from various sources, the weakened immunity of patients, and invasive and other high-
risk procedures. HAIs are the most frequent adverse events in healthcare delivery systems
worldwide. They are a major cause of preventable diseases, deaths, and greater healthcare costs.
The application of evidence-based IPC practices in all healthcare settings is key. The remainder of
this chapter introduces readers to the basic principles of IPC, with the aim of laying the foundation
for the chapters in the rest of the manual.
Goal of Infection Prevention and Control
The goal of IPC is to make healthcare facilities safe for all, including patients, clinical and non-
clinical staff of healthcare facilities, and the community.
WHO Core Components of Infection Prevention and Control
The effective implementation of IPC practices in healthcare facilities requires that appropriate
strategic interventions are put in place. WHO has provided guidance on core components for IPC
interventions, which are summarized in table 1.1.
A comprehensive and effective approach to IPC consists of establishing IPC programs with strong
links to other national programs, for example, those addressing quality and safety and AMR. The
existence of an IPC program is a necessary, but not a sufficient, condition to achieve safe and high-
quality healthcare. At the facility level, an adequately built environment (including the necessary
infrastructure, materials and equipment, appropriate inpatient service, adequate human resources
or staffing and workload) represents the foundation enabling the implementation of all other core
components and the achievement of safe practices. These two prerequisites—a well-organized and

established IPC program and an adequately built environment and IP supplies—support the
effective implementation of IPC guidelines, training and education, program monitoring, audit,
feedback, and surveillance. Implementation success in each of these areas also depends on the
adoption of a multimodal approach, that is, a strategy consisting of several elements implemented
in an integrated way with the aim of improving an outcome and changing behavior.
WHO’s core components of an IPC program at the healthcare facility level comprises the
following eight core components. The first six are especially relevant for the national level,
whereas all eight components apply to healthcare facilities.
Table 1.1. WHO core components of IPC
S. No. Component Recommendation
1 IPC programs An IPC and PS program with a dedicated, trained team should be in
place in each acute healthcare facility for the purpose of preventing
HAIs and combating AMR through IPC good practices.
Standalone, active national IPC programs with clearly defined
objectives, functions, and activities for the purpose of preventing HAIs
and combating AMR through IPC good practices should be
established. National IPC programs should be linked to other relevant
national programs and professional organizations.
2 Evidence-based
guidelines
Evidence-based guidelines should be developed and implemented for
the purpose of reducing HAIs and AMR.
Education and training of the relevant HCWs on guideline
recommendations and monitoring of adherence with guideline
recommendations should be undertaken to achieve successful
implementation.
3 Education and
training
At the facility level, IPC education should be in place for all HCWs by
using team and task-based strategies that are participatory and
include bedside and simulation training to reduce the risk of HAIs and
AMR.
The national IPC program should support education and training of
the health workforce as one of its core functions.
4 HAI surveillance Facility-based HAI surveillance should be performed to guide IPC
interventions and detect outbreaks, including AMR surveillance, with
timely feedback of results to HCWs and stakeholders and through
national networks.
National HAI surveillance programs and networks that include
mechanisms for timely data feedback and with the potential to be
used for benchmarking purposes should be established to reduce
HAIs and AMR.
5 Multimodal
strategies
At the facility level, IPC activities should be implemented using
multimodal strategies to improve practices and reduce HAIs and
AMR.
National IPC programs should coordinate and facilitate the
implementation of IPC activities through multimodal strategies at the
national or subnational level.

S. No. Component Recommendation
6 Monitoring and
audit of IPC
practices and
feedback
Regular monitoring/audit and timely feedback of healthcare practices
should be undertaken according to IPC standards to prevent and
control HAIs and AMR at the healthcare facility level. Feedback
should be provided to all audited persons and relevant staff.
A national IPC monitoring and evaluation program should be
established to assess the extent to which standards are being met
and activities are being performed according to the program’s goals
and objectives. Hand hygiene monitoring with feedback should be
considered as a key performance indicator at the national level.
7 Workload,
staffing and bed
occupancy (for
facility level)
To reduce the risk of HAIs and the spread of AMR, the following
should be addressed:
(1) Bed occupancy should not exceed the standard capacity of the
facility.
(2) HCW staffing levels should be adequately assigned according to
patient workload.
8 Built
environment,
materials, and
equipment for
IPC (for facility
level)
At the facility level, patient care activities should be undertaken in a
clean and/or hygienic environment that facilitates practices related to
the prevention and control of HAIs and AMR, including all elements
around the water, sanitation, and hygiene (WASH) infrastructure and
services, and the availability of appropriate IPC materials and
equipment.
At the facility level, materials and equipment to perform appropriate
hand hygiene should be readily available at the point of care.
Source: WHO 2016
The Infection Chain/Cycle
All humans are susceptible to infections due to some bacteria and most of the viral agents and
other infectious agents. These disease-causing organisms are also called pathogens. The number
(dose) of organisms necessary to produce infection in a susceptible host varies with the location.
All of us touch materials that contain some organisms every day but suffer from no infection
because organisms coming into contact with the intact skin are unlikely to cause such risk.
Nevertheless, when these organisms come into contact with mucous membranes or non-intact
skin, the chance of t h e risk of infection increases. Infection risk increases greatly when
organisms come into contact with normally sterile body sites. In such cases, the introduction of
only few organisms may produce disease.
Health workers have a responsibility to prevent and control infections, including HAIs; however,
it is essential to understand how the infections spread to apply appropriate preventive measures.
For infectious agents to successfully survive and spread, certain factors or conditions must be
present; these are illustrated as the components or elements of the chain of infection (figure 1.1).
If any of the links or components of the chain are absent or removed, an infection cannot occur.
This interruption of the “chain” is commonly referred to as “breaking the chain of infection.” These
concepts are illustrated in figure 1.1.

Figure 1.1 The infection chain
Source: “McKesson Medical-Surgical Inc.2021”
Key Elements of the Chain Infection
The following elements are required, in sequential order, for an infection to occur and spread, as
shown in the infection chain illustration in figure 1.1:
1. Infectious Agent: These are disease-causing organisms, including bacteria, virus, fungus,
parasites, etc.
2. Reservoir: The reservoir is the habitat in which an infectious agent normally lives, grows,
and multiplies. Reservoirs include humans, animals, and the environment. The reservoir
may or may not be the source from which an agent is transferred to a host. For example,
the reservoir of Clostridium botulinum is soil, but the source of most botulism infections is
improperly canned food containing C. botulinum spores. Many of the common infectious
diseases have human reservoirs. Diseases that are transmitted from person to person
without intermediaries include sexually transmitted diseases, measles, mumps,
streptococcal infection, most respiratory pathogens, and many others. Smallpox was
eradicated after the last human case was identified and isolated because humans were the
only reservoir for the smallpox virus. Two types of human reservoirs exist:
• People with symptomatic illness
• Carriers: People who are not experiencing symptoms of an infection but can transmit
the pathogen to others. The different types of carriers are:

o Asymptomatic or passive carriers: Those who have never been ill from the
infection.
o Incubatory carriers: Those who are in the incubation period of the disease.
o Convalescent carriers: Those who have recovered from the infection.
o Chronic carriers: Those who remain as reservoirs for the disease causing agents for
as long as years after they have had the infection.
3. Portal of Exit: This is a gateway through which the agent leaves the host or reservoir.
However, the agent must have the right environment for its survival until it gets an entry to
infect another person/animal. For example, the bacteria that cause tuberculosis (TB)
can survive in sputum for weeks, but can be killed by sunlight within a few hours.
4. Mode of Transmission: An agent that exits and develops in its natural reservoir can be
transmitted in numerous ways to a susceptible host and get portal of entry. The modes of
transmission are classified as:
• Direct transmission refers to an immediate transfer of the agent from a reservoir to a
susceptible host through direct contact or a droplet.
• Direct c ontact occurs through kissing, skin-to-skin contact, and sexual
intercourse.
o Direct contact also refers to contact with soil or vegetation harboring infectious
organisms. Infections, such as mononucleosis (“kissing disease”) and gonorrhea,
are contracted from direct contact with an infected person. Likewise, hookworm
infection is acquired through direct contact with contaminated soil.
• Droplet spread refers to a spray of relatively large, short-range germ laden aerosols
produced by sneezing and/or coughing (or even talking) of infected people. Droplet
spread is classified as direct because transmission is by direct spray over a few
feet before the droplets fall to the ground.
• Indirect transmission: An agent is carried from a reservoir to the susceptible host by
suspended air particles or by animate (vector) or inanimate (vehicle) intermediaries.
o Airborne
o Vehicle-borne
o Vector borne
o Mechanical
o Biologic
This manual deals primarily with preventing the spread of infectious diseases taking
place in healthcare facilities from contacts with such sources as air (airborne and
droplets), blood or body fluids, and contaminated foods or articles.
5. Portal of entry is the gateway through which an infectious agent enters in the susceptible
host. The portals of entry could be the mouth, nose, skin, etc.

6. New/susceptible host is an organism (human or animal) that is liable to take up infectious
agents/pathogens and harbor them. People are exposed to disease-causing agents every day
but do not always get sick. An infectious agent/pathogen getting access to or inhabiting in
the host does not necessarily lead to infection or initiate illness due to the body’s natural
defense mechanisms. The immune system is normally at work to fight against the invading
agent. However, organisms that get access to a new host and reproduce there cause
colonization, which may later increase the likelihood of the development of infections.
The other reason why people do not get sick can be because of previous exposure
through artificial or natural immunity (e.g., vaccinated against it or previously had the
disease).
For example:
Figure 1 . 2 illustrates the steps in the transmission of HBV and HIV from
infected people (e.g., a family planning client or pregnant woman attending an
antenatal clinic) or patients getting treated at healthcare institutions. This spread
of infection from viruses occurs when the staff (physician, nurse, or cleaning
personnel) are exposed to the blood or body fluids of an infected person
(e.g., needle stick injury).
Figure 1.2.Transmissions of HBV and HIV from patients to HCWs
Source: Tietjen, Bossemeyer, & McIntosh 2003

Breaking the Chain of Infection
An understanding of the chain of infection or the transmission cycle of specific infectious diseases
is important if HCWs are to:
• Prevent transmission of microorganisms from patient to patient, from patient to the
provider, or vice versa during medical and surgical procedures.
• Teach others about the factors required for transmission to occur.
• Teach others about how to break the disease transmission cycle.
Preventing the spread of infectious agents or proper IPC practices requires breaking the chain of
infection by removing one or more of the conditions necessary for transmission of the diseases
from the host reservoir to the susceptible host through practices that:
• Reduce the number of microorganisms present (e.g., handwashing, cleaning of
instruments).
• Kill, inhibit, or inactivate microorganisms (e.g., handwashing with a waterless
alcohol preparation, decontamination of patient care items).
• Create barriers to prevent infectious agents from spreading (e.g., wearing gloves
or PPE).
• Reduce or eliminate risky practices (e.g., by using a hands-free technique in the
operating room, using gloves and disposable syringes).
• Make sure that people, especially HCWs, are immune or vaccinated.
Figure 1.3 illustrates how to break or interrupt the chain of infection through IPC practices.

Figure 1.3. Breaking the chain of infection
Source: Adapted from Public Health Ontario n.d.
Failure to apply IPC measures in healthcare settings can increase the risk for HAIs.
Healthcare-Associated Infections
HAIs were previously known as hospital-acquired infections and nosocomial infections. An
infection is called “healthcare-associated” if it is acquired during the course of a healthcare
intervention for other conditions, regardless of where the interventions are provided, or infections
acquired while a patient is under hospital care (or in any other health facility), which are not present
or incubating at the time of admission. It is a time-related criterion that refers to infections
occurring more than 48 hours after admission. This situation, therefore, is inclusive of infections
acquired in the hospital but which appear after discharge, and also occupational infections among
the staff of the facility.

HAIs may also occur
• Up to 48 hours after the episode of care
• Up to three days after discharge
• Up to 30 days after an operation
• Up to one year after an operation with an implant
Note that patients and HCWs are at risk of acquiring HAIs.
HAIs may be endogenous (from self) where the infectious agent is from the patient, such as the
normal flora that causes disease as a result of gaining access to another part of the body where it
is not normally found; for example, an organism from the colon entering the urinary tract and
causing a urinary tract infection.
HAIs may also be exogenous (from others or cross infection). This involves acquiring infection
from an external source; for example, a patient or health worker, through contaminated hands, or
contaminated patient care items, or the environment.
Some of the most common HAIs are urinary tract infections, bloodstream infections, surgical site
infections, and pneumonia.
IP practices are crucial for reducing the risk for any type of HAI with the application of an
understanding of the chain of infection or transmission cycle. The two sets of practices for IP are
standard precautions and transmission-based precautions.
Background on Standard Precautions and Transmission-Based Precautions
Standard precautions: These practices are designed for use in caring for all people, the clients
and patients attending healthcare facilities (first-level precautions). They apply to blood; all body
fluids, secretions, and excretions (except sweat); non-intact skin; and mucous membranes.
Because no one really knows what organisms clients or patients have, it is necessary that standard
precautions be used all the time.
Transmission-based precautions: The second-level precaution is intended for use in patients
known or highly suspected of being infected or colonized with pathogens transmitted by:
• Air (TB, chicken pox, measles, etc.)
• Droplet (flu, mumps, and rubella)
• Contact (hepatitis A [HAV] or E and other enteric pathogens, herpes simplex, and
skin or eye infections).
If there is any impending development of an infectious process in a patient without known
diagnosis, implementing transmission-based precautions should be based on the patient’s signs
and symptoms (empirical basis) up until a definitive diagnosis is made.

In all cases (whether they are being used alone or in combination), transmission-based
precautions must be used in conjunction with the standard precautions.
Background on Clean and Aseptic Techniques
Aseptic technique means using practices and procedures to prevent contamination from pathogens.
It involves applying the strictest rules to minimize the risk of infection. HCWs use aseptic
technique in surgery rooms, clinics, outpatient care centers, and other healthcare settings.
Antisepsis is the process of reducing the number of microorganisms on the skin, mucous
membranes, or other body tissue by applying an antimicrobial (antiseptic) agent.
The goal of the aseptic technique is to eliminate germs entirely. The goal of the clean technique is
to reduce the number of germs whenever possible.
Clean techniques are important for all healthcare providers and their patients because they prevent
infections every day.
Examples of clean techniques include washing hands and putting on clean gloves when needed.
Healthcare providers keep a patient’s surroundings as clean as possible, but they are not using
sterile items or aseptic techniques.
Asepsis and aseptic techniques are the combination of efforts made to prevent entry of
microorganisms into any area of the body where they are likely to cause infection. The goal of
asepsis is to reduce to a safe level, or eliminate, the number of microorganisms on both animate
(living) surfaces (skin and mucous membranes) and inanimate objects (surgical instruments and
other items).
Keeping the environment as clean as possible is always important in preventing infections.
However, some situations call for aseptic technique, whereas others call for clean techniques.
SUMMARY
In summary, the goal of IPC is to make healthcare facilities a safer place. WHO’s components of
IPC are an integral part of these guidelines. Understanding each step of the chain of infection or
transmission cycle is one step forward in the prevention and control of HAIs. Always apply
standard precautions and transmission-based precautions, as appropriate. IP and PS activities are
Asepsis Risk reduction of contamination
Surgical antiseptic
technique
Aseptic technique Clean technique

everybody’s responsibility. Each and every one of us have a responsibility to implement IPC and PS
activities at our healthcare facilities.
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CHAPTER 1: INTRODUCTION TO INFECTION PREVENTION AND CONTROL
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Chapter 2: Basic Microbiology for IPC 36
CHAPTER 2: BASIC MICROBIOLOGY FOR IPC
Key Topics
• Basic features of microorganisms
• Classifications and identification of microorganisms
• How microorganisms cause disease
• Common techniques for identifying microorganisms
• Characteristics of microorganisms of interest for IPC
BACKGROUND
A basic knowledge of the microscopic organisms that commonly cause infections and the methods
used by the clinical laboratory to identify and examine them are important in the day-to-day work
of the IPC team. Understanding the features and behavior of the microorganisms that are causing
infections in a healthcare facility, in particular HAIs, can help the IPC team choose the most
effective prevention strategy. It will also help IPC focal persons to more effectively convince
HCWs of the need for basic IPC strategies, such as hand hygiene, standard precautions,
transmission-based precautions, cleaning, and disinfection. Understanding the methods used in the
clinical laboratory can also assist the IPC team in making sure that the best-quality samples are
taken so that the microorganisms that are causing infection can be identified.
Basic Features of Microorganisms
The basic features that microorganisms of medical interest share can help hospital staff, patients,
and families understand the importance of IPC. The features are given in table 2.1.
Table 2.1. Basic features of microorganisms and the implications for healthcare
Biological
feature
Characteristic Implications for healthcare
Microscopic
size
Microorganisms can be
seen only with a
microscope.
Even a microscopic crack or space in equipment
(such as an intravenous [IV] line or endoscope) can
contain numerous microorganisms that can be
passed to a patient.
Rapid rate of
reproduction
If conditions are
favorable,
microorganisms can
multiply quickly.
If even just a few microorganisms enter a vulnerable
patient under the right conditions, they have the
potential to cause serious infection in a short period
of time.
Tendency to
spread from
one place to
another
Microorganisms can
spread through air
currents, people’s
hands, or equipment.
Staff, patients, and families in healthcare facilities
can spread microorganisms from one place to
another and from one patient to another via their
hands or equipment. Methods to remove
microorganisms from the hands, medical equipment,
and surfaces at facilities (through handwashing,
cleaning, disinfection, and sterilization) must be
performed carefully, consistently, and thoroughly.

Biological
feature
Characteristic Implications for healthcare
Ability to
resist
eradication
Some microorganisms
can survive harsh
conditions (heat, cold,
dryness, and
chemicals).
HCWs must carefully follow instructions for removing
microorganisms from their hands, medical
equipment, and surfaces at facilities (through
handwashing, cleaning, disinfection, and
sterilization).
Source: Association for Professionals in Infection Control and Epidemiology (APIC) 2014b
Classification and Identification of Microorganisms
Microorganisms that HCWs and IPC staff may encounter in healthcare settings include bacteria,
fungi, parasites, and viruses.
The names of bacteria, viruses, fungi, and parasites follow the naming convention of the biological
classification system. Their names contain two terms and are written in italic letters. The first term
is the genus name; the second term is the species name. For example, for Staphylococcus aureus,
the genus name is Staphylococcus, and the species is aureus.
After the first use of the full name in a text, the genus is abbreviated with the first letter;
Staphylococcus aureus is written as S. aureus.
The genus name can be used alone (e.g., Staphylococci) but the species (e.g., aureus) cannot be
used alone because a genus includes other species; Staphylococcus includes Staphylococcus
epidermidis and Staphylococcus haemolyticus.
The singular form of “species” is abbreviated as “sp.” and the plural as “spp.” When used with a
genus, spp. is a short way of saying that something applies to many species in a genus, but may
not apply to all species in that genus.
Viruses are named by their family/subfamily, genera, and species. For example, influenza virus is
from the family Orthomyxoviridae, in general Influenza A, B, and C. There are several subtypes
of Influenza A, for example H1N1, H1N2, and H3N1.
It is common practice to name viruses based on the disease they cause. For example, the virus that
causes acquired immunodeficiency syndrome (AIDS) was named human immunodeficiency virus
(HIV).
Bacteria
Characteristics
Bacteria are single-cell organisms (figure 2.1) with a well-defined cell wall that maintains the
shape of the cell and protects an underlying structure called the plasma membrane, which
surrounds and encloses the contents of the cell, including:
• Cytoplasm, which contains the other cell contents

• Ribosomes, which produce proteins for cell function
• Genetic material, which is composed of a bacterial chromosome made of double-
stranded DNA that is essential for cell function and replication. Some bacteria also
have plasmids, which contain other DNA molecules that are not necessary for cell
replication and that carry genes for antibiotic resistance and production of toxins and
enzymes.
Some bacteria also have appendages on the outside of the cell that help the cell move (flagella) or
help the cell attach to surfaces or other cells (fimbriae and pili) (APIC 2014b).
Figure 2.1. Structure of a bacterial cell
Source: Villarreal 2008
Bacteria reproduce by cell division; a cell divides into two identical cells. When artificially grown
on an appropriate culture medium, new cells form groups of the same species and strain of bacteria,
called colonies, which may be seen with the naked eye.
Significance for Healthcare
Bacteria are the most common causes of HAIs (WHO 2002) and thus it is helpful for HCWs and
the IPC team to know the key characteristics of bacteria commonly seen in healthcare facilities.
Laboratory Methods of Identification
Colonies of bacteria can be identified without a microscope by their appearance (known as clonal
morphology) on the nutrient gel used to grow them. Colonies of bacteria differ in color, size, form,
elevation, texture, and margin (figure 2.2).

Figure 2.2. Colony morphology of bacteria
Source: Macedo 2016
Morphology (forms and structure) of bacteria cells is used to identify and classify different
groups of bacteria. Given the small size of these microorganisms, they can be viewed and
recognized only under a microscope, based on their size, shape, and how they are grouped together.
Figure 2.3 shows some of the different shapes and groupings of bacteria that can be seen under the
microscope.
Coccus: Staphylococcus aureus
Rods (bacilli): E. coli, K. pneumoniae
Spiral: Treponema pallidum pertenue
Figure 2.3. Shapes and groupings of bacteria
Source: Ruiz 2006

Staining of the cell walls with different dyes is also used to identify and classify bacteria (Figure
2.4). Gram stain is widely used in clinical laboratories to differentiate bacteria into two groups:
gram positive and gram negative. Nearly all clinically relevant bacteria fall into one of these two
groups based on whether their cell walls retain Gram stain. Another clinically relevant group of
bacteria are acid-fast bacilli (AFB). Gram stain quickly determines a broad group of bacteria,
which can be important for choosing the appropriate antibiotic to treat the infection and for
determining the need for isolation of the patient. For example, gram-negative diplococci in
cerebrospinal fluid suggest meningococcal meningitis, and gram-positive cocci suggest
staphylococci as the cause of infection. AFB-positive rods suggest Mycobacterium spp., which
may be TB (APIC 2014b).
Gram stain can also help the IPC team focus and guide IPC activities. For example, gram-positive
bacteria include S. aureus, which commonly colonizes the skin and the nose of staff and patients.
S. aureus is often resistant to antibiotics, can cause serious infections in the lungs, bones, and heart,
and can also result in sepsis.
Figure 2.4. Bacterial classification by staining properties

Source: Lowy n.d.
Gram-negative bacteria include Enterobacteriaceae (e.g., Escherichia coli, Klebsiella spp.,
Serratia spp.) that commonly cause serious infections, especially when medical devices are used
(such as urinary catheters and IV lines), are often resistant to antibiotics, and colonize patients in
hospitals. Other gram-negative organisms (Pseudomonas spp. and Acinetobacter spp.) live in
damp and wet areas of facilities, are difficult to eradicate from the environment, and cause HAIs.
Growth characteristics, including growth rate, composition of the air, nutrients, and temperature
in which bacterial colonies grow, are used to identify bacteria. Bacteria can be divided into groups
according to:
• Oxygen requirements: “Aerobic” bacteria require oxygen to grow; “anaerobic”
bacteria grow in the absence of oxygen. Aerobic bacteria are more likely to be found
on the surface of the body. The presence of anaerobic bacteria (e.g., Bacteroides
fragilis and Clostridium perfringens) can indicate a source from a deep wound, the gut,
or vagina. Bacteria can be strict (obligate) anaerobes, which die in the presence of
oxygen, or facultative anaerobes, which can survive with or without oxygen (APIC
2014b).
• Fermentation of carbohydrates: Lactose fermenting bacteria are typically gram
negative. For example, Enterobacter spp. are lactose fermenting and Pseudomonas
spp. and Proteus spp. are non-lactose fermenting.
• Presence of specific enzymes:
o Catalase test differentiates streptococci (negative) from staphylococci (positive).
o Coagulase test differentiates S. aureus (positive) from other staphylococci such as
S. epidermidis (negative) (APIC 2012; APIC 2014b).
Viruses
Characteristics
Viruses are microorganisms that are smaller than bacteria and consist of genetic material, which
can be either DNA or RNA, surrounded by a protein coat and, in some viruses, by a membranous
envelope. Viruses do not have many of the cell structures found in bacteria and fungi, and are able
to multiply only in the living cells of a host (figure 2.5.) They attach to receptors on the host cell

(such as a respiratory tract cell), enter the cell, and use the cell to replicate. The offspring are then
released from the host cell.
Viruses are classified based on:
• The type of substance that makes up their central core—DNA (e.g., herpesvirus,
cytomegalovirus) or RNA (e.g., HIV, measles, Ebola Virus Disease [EVD], severe
acute respiratory syndrome-associated coronavirus [SARS-CoV], HCV, and polio).
• The number of strands in the core—double-stranded (e.g., rotavirus) or single-stranded.
• The presence or absence of a membrane-like envelope surrounding them—enveloped
(coronaviruses [CoVs], herpesvirus, chicken pox virus, influenza viruses, and EVD)
and non-enveloped viruses (adenovirus, poliovirus) (APIC 2014b).
Figure 2.5. Transmission electron micrograph of EVD
Source: Centers for Disease Control and Prevention (CDC) 2019b
Implications for Healthcare
Many viruses can be transmitted in the healthcare environment and often cause HAIs and
outbreaks. Bloodborne viruses, such as HIV and HBV and HCV, can be spread from patient to
patient during transfusions, dialysis, injections, and endoscopy. Viruses, such as influenza and
respiratory syncytial virus (RSV), can be spread from patient to patient by respiratory fluid droplets
during crowding or sharing of respiratory equipment, or on contaminated hands. Other viruses,
such as measles and varicella, quickly spread to patients on air currents. Rotaviruses and
enteroviruses infect the gastrointestinal tract and are transmitted by hand-to-mouth contact due to
poor hand hygiene and inadequate cleaning (WHO 2002).
The presence or absence of a virus envelope has significance for cleaning and disinfection.
Enveloped viruses (e.g., herpes, HIV, Ebola) are easier to kill with disinfectants than non-
enveloped viruses (e.g., norovirus, rotavirus, adenovirus, and poliovirus). Cleaning products
should be evaluated for their ability to kill both enveloped and non-enveloped viruses (Rutala,
Weber, Healthcare Infection Control Practices Advisory Committee 2008).

Most virus identification methods are out of the scope of many clinical laboratories in limited-
resource settings but may be available in reference laboratories. Examples of some tests commonly
used to detect the presence of virus are:
• Enzyme-linked immunosorbent assay (ELISA) for detecting antibodies against HIV,
RSV, rotavirus, and HBV
• PCR for DNA and RNA detection of HIV, human papillomavirus, and many other
viruses
• Papanicolaou (Pap) smears for the effect of human papillomavirus on squamous cells
lining the cervix (APIC 2014b).
Fungi
Characteristics
Fungi are typically slightly larger than bacteria and can be divided into yeasts and molds based on
their appearance.
• Yeasts are single-celled, microscopic, and form smooth, creamy colonies in culture
(figure 2.6).
• Molds consist of long, branching filaments of cells called hyphae. A tangled mass of
hyphae visible to the naked eye is a mycelium and can be various colors (black, white,
or green) (APIC 2014b).
Figure 2.6. Candida albicans
Source: Colm 2010

Although fungi can cause infection in humans (e.g., Candida albicans), most are opportunistic
pathogens that cause infections (which can be severe) in those who are on extended antibiotic
treatment or are immunosuppressed (C. albicans, Aspergillus spp., Cryptococcus neoformans,
Cryptosporidium). A species of yeast, Candida auris, with a propensity to spread in hospitals and
that is resistant to multiple antifungals, is emerging globally. Molds, such as Aspergillus spp.,
which originate in dust and soil can become airborne and infect vulnerable patients during hospital
renovation or construction if precautions are not taken (APIC 2014b; WHO 2002).
Like bacteria, fungi can also form colonies. Fungi are mainly identified using direct examination
under the microscope of the physical characteristics of the mold, such as shape, color, staining,
and the root-like structures. They are also identified through culture and non-culture tests (APIC
2014b).
Parasites
Characteristics
Parasites range from single-cell protozoan parasites (Giardia spp. and Plasmodium spp.) to large
worms (e.g., hookworm) and insects (Sarcoptes scabiei, the scabies parasite). Some parasites can
live inside the cell (intracellular), such as the parasite that causes malaria (Plasmodium spp.)
(figure 2.7). Others (such as scabies, mites, and lice) live on the outside the body, on the skin. Most
protozoan parasites exist in two different forms:
• The trophozoite stage—the feeding stage during which the parasite produces effects in
the host.
• The cyst stage—the dormant stage, when most protozoan parasites are transmitted.
Figure 2.7. Plasmodium falciparum, malaria parasite

Source: CDC/Dr. Mae Melvin 1971
Common Parasitic Infections
Healthcare-associated parasitic infestations include scabies, lice, and myiasis (maggots). Water-
or foodborne parasite infestations—such as amoebiasis (caused by Entamoeba histolytica) or
cryptosporidiosis (caused by Cryptosporidium parvum)—mainly occur in community settings but
can also spread in hospitals.
Some parasites can spread from person to person in healthcare facilities. Giardia lamblia is easily
transmitted from person to person through poor hand hygiene and unclean surfaces. The mite that
causes scabies can cause outbreaks in healthcare facilities. Others, such as malaria, are spread via
mosquitoes (vectors) and, therefore, can spread in healthcare facilities if patients are not protected
from mosquitos and other insect bites (WHO 2002).
Several laboratory methods for the identification of parasite infestation are available. They include
microscopy, serology-based assays, and molecular-based essays. Direct examination of stool or
urine for blood or ova from intracellular parasites is the primary method of diagnosis for parasites
in some laboratories (APIC 2014b).
Microbial Pathogenesis (How Microbes Cause Disease)
Normal Flora/Commensal Microbiota
Normal flora/commensal microbiota vary by body site. For example, coagulase-negative
staphylococci are common on the skin and E. coli in the gut (APIC 2014b; WHO 2002).
Implications for healthcare: Commensal bacteria can cause opportunistic infections when the
immune system is compromised (e.g., in infants, the elderly, or those with acute or chronic disease)
or the other body defenses are interrupted (e.g., a surgical wound disrupting the protective barrier
of the skin; a medical device, like an IV or urinary catheter, entering the body; or prolonged use
of antimicrobial agents leading to an imbalance in the commensal gut microbiota). Examples
include coagulase-negative staphylococci from the skin, which can cause an IV line infection, and
E. coli from the gut, which can cause a urinary tract infection (WHO 2002).
Colonization
Examples of colonization include Neisseria meningitidis in the throat, Salmonella species in the
gut, methicillin-resistant S. aureus (MRSA) in the nose, or yeast in the genital tract.
Implications for Healthcare: Colonization may result in infection of the colonized person when
the immune or other body defenses are interrupted (e.g., a person colonized with MRSA has
surgery, which interrupts the natural barrier of the skin, and develops a MRSA surgical site

infection [SSI]). Transmission to others (e.g., a person with Salmonella colonization is involved
with food preparation at the healthcare facility and does not wash his/her hands and transmits
Salmonella to patients).
Organisms that are resistant to antibiotics often colonize hospitalized patients, which can then lead
to infections that are difficult to treat. Surveillance cultures (such as nose swabs for MRSA and
rectal swabs for vancomycin-resistant enterococci [VRE] or carbapenem-resistant
Enterobacteriaceae [CRE]) may be used in some settings to identify patients with colonization. If
colonization with MRSA, which can cause serious SSIs, is identified before surgery from
surveillance cultures of the nose (or other sites), medications to decolonize can be prescribed to
decrease the risk of an SSI from MRSA.
Infection
An infection usually causes clinically apparent symptoms, or sometimes may cause no symptoms
and be subclinical. Symptoms vary according to the type of microorganism and the location of the
infection. Symptoms are a result of the actions of the microorganisms on the body (e.g., diarrhea,
necrotic tissue) and the immune response to them (e.g., fever, purulence). The characteristics and
location of the microorganism, and the immune status of the person determine if and how an
infection progresses (APIC 2014b).
Implications for Healthcare: People seeking care at healthcare facilities may be more vulnerable
and prone to infections, especially infants, pregnant women, the elderly, people with acute or
chronic diseases, and those with a condition that suppresses the immune system and/or disrupts
body defenses (wounds, invasive medical devices). It is important to protect patients from
exposure to pathogenic microorganisms in the facility and identify any patients with infections
that may spread to others.
Sources of Microorganisms
HAIs can be categorized according to the source of the microorganisms that cause them. Bacteria
can come from:
• The patient (endogenous): Organisms from the individual’s own body (normal flora or
colonization) can cause infection when the immune system is compromised, other body
defenses are interrupted (via a wound or medical device), or antibiotic therapy causes
overgrowth of some microorganisms (such as yeast in the gastrointestinal and
reproductive tracts) (APIC 2014b; WHO 2002).
Implications for healthcare: IPC includes surgical asepsis; preoperative skin antisepsis;
preventive care when inserting and maintaining invasive medical devices; removal of
invasive medical devices as soon as possible; decolonization of colonized patients using
an appropriate antimicrobial agent; patient education on hand hygiene and cleanliness;
and rational use of antibiotics.
• Another person (exogenous infection): Organisms that cause infection can come
from a source outside the individual, such as:

o Other patients (direct contact with blood or other body fluids, respiratory droplets,
unwashed hands)
o Airborne (aerosols/air droplets carrying TB, varicella, or measles)
o Staff (contaminated or colonized hands, clothing, skin)
o Objects contaminated by an infected person (equipment, environmental surfaces) or
contaminated sources (water, fluids, food) (APIC 2014b; WHO 2002).
Implications for Healthcare: IPC includes standard precautions, including hand hygiene
and use of PPE, and isolation using transmission-based precautions. Administrative and
environmental controls should also be considered.
• The healthcare environment: Organisms causing infection can come from the
hospital environment where they live permanently or transiently, including such places
as:
o Water, damp areas, fluids, and even disinfectants (e.g., Pseudomonas spp.,
Acinetobacter spp., Mycobacterium spp., Legionella spp.).
o Surfaces, equipment, supplies, and patient care items if reused and/or not well-
cleaned.
o Food prepared or stored by the hospital or the patients’ families.
o Dust/soil, such as during construction or renovation of the facility (e.g., Aspergillus
spp.) (APIC 2014b; WHO 2002).
Implications for healthcare: IPC includes proper handling of fluids, correct handling
and dilution of disinfectants, elimination of damp areas when possible, use of the
cleanest water available, monitoring of the food service, regular and thorough
environmental cleaning, hand hygiene, proper cleaning of multi-use items, and
isolation/careful control in areas undergoing construction/renovation.
Background of Microorganisms of Interest for IPC
Characteristics of Organisms Commonly Associated with HAIs
Microorganisms have characteristics that enable them to survive and/or easily spread in healthcare
environments. These characteristics include:
• Are able to survive on the hands of HCWs, environmental surfaces, and medical
equipment when IPC practices, such as hand hygiene, cleaning, disinfection, and
sterilization, are suboptimal. Examples include influenza virus, RSV, and S. aureus,
which can live for hours or days on hands and surfaces if not cleaned.
• Can survive dryness, heat, and disinfectants and so can cause infections in patients
and HCWs in healthcare facilities despite IPC methods, such as hand hygiene,
cleaning, disinfection, and sterilization. Examples include norovirus, C. difficile, some
molds that survive by forming spores, Pseudomonas spp., and microorganisms that
have been known to survive in disinfectants.
• Live in blood and body fluids even though they cannot survive for long in the
healthcare environment. These microorganisms can be passed from person to person

via items contaminated with blood or body fluids—even minute amounts. Examples
include HBV, HCV, and HIV on or in dialysis machines, multi-dose vials, multi-use
lancets, or insulin pens; and EVD on the hands, equipment, and surfaces that are not
adequately cleaned.
• Thrive in damp areas, and thus the drains, sinks, and equipment that use water (such
as humidifiers, patient warmers, and respiratory equipment) can harbor these
organisms. Fluids used in healthcare, such as IV fluids and disinfectants, can also grow
microorganisms. Examples include Mycobacterium spp. and gram-negative bacteria
such as Acinetobacter spp., Pseudomonas spp., Burkholderia spp., and
Enterobacteriaceae.
• Colonize patients and staff, allowing the microorganisms to survive in the healthcare
environment and pass from person to person, causing an infection if the immune
defenses become suboptimal, such as after surgery or when medical devices are in
place. Examples include S. aureus, Enterobacteriaceae, and Enterococcus spp.
• Are small in size and able to remain suspended in the air and be transmitted short
distances through the air in respiratory droplets, especially when propelled by
coughing or sneezing, and therefore can cause transmission if PPE to protect the nose,
mouth, and eyes—as described for standard precautions and transmission-based
precautions—are inadequate. Examples include influenza and N. meningitidis.
• Are very small in size and so are able to float long distances on air currents if the
ventilation at the facility is not protective of staff and patients. Examples include the
viruses causing varicella, measles, and SARS.
• Are resistant to antimicrobials; examples include MRSA, VRE, and CRE (CDC
2019a).
These characteristics help determine which microorganisms commonly cause HAIs. The causes of
HAIs are generally similar, no matter the country or region (table 2.2), although gram-negative
organisms are more likely to be the most common cause of bloodstream infection in middle- and
low-resource settings than in high-income settings. A knowledge of the specific microbes and the
microbial patterns of infection in the specific facility (from surveillance), country (from the health
department or published articles), or region (from combined data) can be helpful in guiding IPC
efforts at a facility (Mahon, Lehman, Manuselis 2014; WHO 2011).
Table 2.2. Microorganisms that cause the four HAIs of global public health interest
HAI Microorganisms that cause HAIs
Central line-associated
bloodstream infection
Coagulase-negative staphylococci, S. aureus, Enterococcus
spp., Candida species,MRSA, Klebsiella pneumonia,
Escherichia coli, Pseudomonas aeruginosa
Surgical site infection S. aureus, coagulase-negative staphylococci, Enterococcus
spp., E. coli, P. aeruginosa, Enterobacter species, K.
pneumoniae and oxytoca, Candida spp., Acinetobacter
Baumannii
Catheter-associated
urinary tract infection
E. coli, Enterococcus spp., P. aeruginosa, Candida
spp., K. pneumoniae, Enterobacter spp.

Pneumonia E. coli, Klebsiella spp., Proteus spp., S. pneumoniae, H.
influenzae, S. auerus, Acinetobacter spp., P. aeruginosa
Adapted from American Thoracic Society Documents 2005; Carr 1998; CDC 2011; Hidron, Edwards, Patel, et al. 2008
Gram-Negative Bacteria
HAIs caused by gram-negative bacteria include pneumonia, bloodstream infections, wound or
SSIs, and meningitis. Gram-negative bacteria are often resistant to antibiotics. This group, which
includes Klebsiella spp., Acinetobacter spp., Pseudomonas aeruginosa, and E. coli, among many
others, is found in damp areas and is transmitted via the unwashed hands of HCWs, water sources,
and inadequately cleaned medical equipment. Careful attention to IPC practices, such as standard
precautions, including hand hygiene and proper environmental cleaning, reduces the risk of
patients acquiring infections.
• Enterobacteriaceae are a group consisting of several families of gram-negative
bacteria, many of which are normally present in the gut, including E. coli, and species
of Proteus, Enterobacter, Klebsiella, Citrobacter, and Serratia. However, patients
whose care requires medical devices (endotracheal tubes, urinary catheters, or IV
catheters) and those who are on long courses of antibiotics are at risk of developing
localized or bloodstream infections with these organisms. Members of this group can
cause gastrointestinal illness (e.g., Shigella, Salmonella, and Yersinia).
Enterobacteriaceae in healthcare settings are of particular concern because they have
become resistant to most or all available antibiotics and pass this resistance along to
other bacteria. Similar to other gram-negative organisms, prevention includes cleaning,
preventing damp areas, and paying careful attention to IPC measures, such as standard
precautions and hand hygiene. The rational use of antimicrobials is also a critical
component. Contact precautions may be warranted for known cases of multidrug-
resistant colonization or infection (CDC 2019a; WHO 2002).
• Acinetobacter species are commonly found in water and soil but infections with this
organism rarely occur in the community. Outbreaks of pneumonia and blood and
wound infections in hospitals, including ICUs, are usually caused by Acinetobacter
baumannii. Acinetobacter spp. can also colonize patients (such as those on a ventilator,
with wounds, or with a long hospital stay) and spread to other patients. Prevention
includes cleaning, preventing damp areas, and paying careful attention to IPC
practices, such as standard precautions, including hand hygiene and environmental
cleaning (CDC 2019a; WHO 2002).
• Pseudomonas infection is caused by strains of bacteria found in the healthcare
environment, especially Pseudomonas aeruginosa. Although P. aeruginosa can cause
infections in the community (such as ear and eye infections), serious infections usually
occur in healthcare settings. Patients with weak immune systems, those with medical
devices (endotracheal tubes, urinary catheters, or IV catheters), and those with wounds
from surgery or from burns are at risk for life-threatening infections. Prevention
includes cleaning, preventing damp areas, and paying careful attention to IPC

cleaning (CDC 2019a; WHO 2002).
Gram-Positive Bacteria
Gram-positive bacteria often cause infections in healthcare settings. These bacteria have sturdy
cell walls and are therefore capable of surviving for longer periods on surfaces in the healthcare
environment and on the skin (WHO 2002).
• Staphylococcus aureus is found on the skin and in the nasal passages of about 30% of
people. It causes skin infections in the community; however, in healthcare settings, S.
aureus can cause serious and life-threatening infections, such as pneumonia, sepsis,
endocarditis, osteomyelitis, and SSI. Patients with weak immune systems, those with
medical devices (endotracheal tubes, urinary catheters, or IV catheters), and those with
chronic conditions, such as diabetes or cancer, are at risk. S. aureus can become
resistant to antibiotics, making the infections more difficult to treat (specifically the
group of beta-lactam antibiotics that include methicillin, oxacillin, penicillin, and
amoxicillin). These are known as MRSA. Prevention includes careful attention to IPC
cleaning, and excellent asepsis of the skin before procedures. Contact precautions may
be warranted for known cases of MRSA (CDC 2019a; WHO 2002).
Organisms Specific to Particular Body Systems
It can be helpful for the IPC team to be aware of the microorganisms that typically cause infections
to various body systems (Table 2.3). Those infections occurring in the community may be caused
by different organisms than those acquired in the healthcare facility. An occurrence of one of these
infections should alert the IPC team to investigate a possible HAI. In addition, infections with
certain organisms warrant transmission-based precautions to prevent their spread in the facility.
Table 2.3. Background of the common organisms that cause infection of body systems
Infection/site Common organisms
Bone and joint
infections
Osteomyelitis: S. aureus, Salmonella sp., Pseudomonas sp., Streptococcus
agalactiae, Septic arthritis: S. aureus, Neisseria gonorrhoeae, S. pneumoniae,
S. pyogenes
Endocarditis/
heart valve
St. viridans, S. aureus, Enterococcus spp., Haemophilus spp., S. epidermidis,
Candida spp.
Gastroenteritis/
intestines
Salmonella sp., Shigella spp., Campylobacter spp., E. coli O157:H7, viruses, G.
lamblia, Entamoeba histolytica, Yersinia spp., Vibrio spp., C. difficile

Infection/site Common organisms
Meningitis/brain
membrane
Neonates: Gram-negative bacilli, St. agalactiae (group B), Listeria
monocytogenes
Infants: St. agalactiae (group B), E. coli, H. influenzae, S. pneumoniae, N.
meningitides
Children: S. pneumoniae, N. meningitides
Older adults: S. pneumoniae, N. meningitides, L. monocytogenes, aerobic
gram-negative Bacilli
Others: C. neoformans, M. tuberculosis, viruses
Peritonitis/
abdomen
Bacteroides spp., anaerobic cocci, Enterococcus spp., Enterobacteriaceae, S.
aureus, Candida spp.
Respiratory tract
infections, upper
Pharyngitis: S. pyogenes, respiratory viruses, C. albicans, N. gonorrhoeae,
Corynebacterium Diphtheria
Sinusitis: S. pneumoniae, H. influenzae, S. pyogenes, S. aureus, gram-negative
bacilli
Respiratory tract
infections, lower
Bronchitis: S. pneumoniae, H. influenzae, respiratory viruses, Bordetella
pertussis, RSV
Pneumonia: S. pneumoniae, H. influenzae, Mycoplasma pneumoniae,
Chlamydophila pneumoniae, Mycobacterium tuberculosis, S. aureus, gram-
negative bacilli, anaerobes, Legionella pneumophila, Pneumocystis jiroveci
(carinii)
Empyema: S. aureus, Streptococcus spp., anaerobes, S. pyogenes, H.
influenza
Sexually
transmitted
diseases
Skin infections
Chlamydia trachomatis, N. gonorrhoeae, Bacteroides spp., Enterobacteriaceae,
Gardnerella
vaginalis, Mobiluncus sp., Trichomonas vaginalis, Treponema pallidum, HIV,
cytomegalovirus, human papillomavirus, pubic lice, scabies
S. aureus, S. pyogenes, Candida spp., dermatophytes, gram-negative bacilli,
Clostridium spp.
Burns: S. aureus, Candida spp., P. aeruginosa
Urinary tract
infections
E. coli and other Enterobacteriaceae, Enterococcus spp., Candida spp.,
Klebsiella spp.,
Proteus spp., Pseudomonas spp., S. saprophyticus
Sources: APIC 2014b; Brooks 2012; Mahon, Lehman, Manuselis 201
SUMMARY
Microorganisms that IPC staff may encounter in healthcare facilities include bacteria, fungi,
parasites, and viruses. Collaboration with the clinical laboratory can increase the IPC team’s
capacity to identify, investigate, and contain infectious diseases.
Knowledge of the microorganisms that cause HAIs, and the methods used to identify them, are
important in the day-to-day work of an IPC team and will help improve PS at the facility. The IPC
team needs to aware of, and knowledgeable about, the basic characteristics of microorganisms that
cause HAIs, and should be familiar with the characteristics of those organisms that are significant
in their setting and patient population.

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CHAPTER 2: BASIC MICROBIOLOGY FOR IPC
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Chapter 3: Standard and Transmission-Based Precautions 54
CHAPTER 3: STANDARD AND TRANSMISSION-BASED
PRECAUTIONS
Key Topics
• Key components of standard precautions
• Key components of transmission-based precautions
• Empiric/syndromic use of transmission-based precautions
• Recommended precautions for each route of infection transmission
BACKGROUND
Standard precautions for infection control guidelines issued by the CDC in 1996 involves two levels
of approaches: standard precautions and transmission-based precautions. Standard precautions
combine the major features of universal precaution and body substance isolation. The basic concept
in the implementation of standard precautions is the maintenance of a physical, mechanical, or
chemical barrier among microorganisms, the environment, and an individual, thus breaking the
disease transmission cycle. The rationale is that, for transmission to occur in the healthcare setting, all
elements in the disease transmission cycle must be present (as discussed in Chapter 1: Introduction to
IPC). Whether it is a woman coming for antenatal care, a hospitalized patient, or a HCW caring for
patients, standard precautions help prevent the spread of bloodborne pathogens, respiratory viruses
(e.g., HBV, HCV, HIV, and influenza), and other infectious diseases in healthcare facilities.
Standard Precautions
Standard precautions are a set of guidelines designed to create a physical, chemical, and mechanical
protective barrier between a microorganism and a person to prevent the spread of infection (the barrier
serves to break the diseases transmission cycle).
Examples of barriers are:
• Physical barrier – PPE
• Mechanical barrier – HLD and sterilization
• Chemical barrier – antiseptic and disinfectant
Standard precautions are first-level precautions. The aim of standard precautions is to reduce the risk
of transmitting microorganisms from known or unknown sources of infection (e.g., respiratory
droplet, contaminated object) in healthcare settings. Applying standard precautions while providing
patient care is based on the expected interaction a HCW will have with blood, body fluids, or potential
pathogen exposure from patients. They provide a rationale for the appropriate use of limited IPC
resources.
Key Principles of Standard Precautions
• Consider every client and patient as potentially infectious or susceptible to infection.

• Apply to all patients and clients attending a healthcare facility.
• Apply to all blood, body fluid, secretion, execration (except sweat), mucous membrane,
and non-intact skin.
Key Components of Standard Precautions
The components of standard precautions create protective barriers for preventing infections in visitors,
patients, and HCWs, and are based on the premise that every person (patient, visitor, or HCW) is
potentially infectious and susceptible to infection.
The key components of standard precautions are:
• Hand hygiene involves HCWs cleaning their hands before, after, and at specific moments
during patient care and when performing healthcare tasks. Hand hygiene is the single most
important intervention for preventing transmission of infections (e.g., person to person or
contaminated object to person). It must be performed consistently at the recommended
moment during patient care using soap and water or ABHR, and with a technique that
effectively removes microorganisms from the hands. (For detailed information, see
Volume 1, Chapter 4: Hand Hygiene).
• Use of PPE relies on an HCW’s assessment of the likely risk of contact with potentially
infectious materials during each task. The appropriate PPE should be chosen by the HCW
according to the assessed risk. The risk is not based on the appearance, characteristics, or
diagnosis of the patient, but rather on the potential for the HCW coming into contact with
blood, body fluids, non-intact skin, mucous membranes, or items that have been in contact
with them. The risk may be reassessed during the task (e.g., if the patient starts vomiting)
and PPE added, as needed. PPE is used depending on the assessed risk of transmission.
(For detailed information, see Volume 1, Chapter 5: Personal Protective Equipment.)
• Safe injection practices are those that do not harm the patient, do not expose the HCW to
any risks, are provided by skilled personnel using appropriate injection equipment, and do
not result in waste that is dangerous to the community. (For detailed information, see
Volume 1, Chapter 6: Sharps and Injection Safety.)
• Environmental cleaning is the cleansing of noncritical care equipment, instruments,
devices, and environmental surfaces. Patient care equipment is cleaned between each use
on patients to prevent cross-contamination between patients. (For detailed information, see
Volume 1, Chapter 9: Environmental Cleaning.)
• Instrument processing is managing instruments and other items before their reuse to
reduce the transmission of infection during clinical procedures and patient care through
cleaning and sterilization or HLD. (For detailed information, see Volume 1, Chapter 7:
Decontamination and Reprocessing of Medical Devices.)
• Processing textiles and laundry in a manner that:
o Removes pathogens from the textiles and protects cleaned textiles from the
reintroduction of pathogens.

o Reduces the risk for transfer of pathogens to HCWs, other patients, and the
environment. (For detailed information, see Volume 1, Chapter 8: Processing Reusable
Textiles and Laundry Services.)
• Healthcare waste management: Healthcare waste is a key issue to control to reduce
HAIs at healthcare facilities and to ensure that the environment is well protected.
Healthcare waste management (HCWM) should be a part of the overall management
system of a healthcare facility and should reflect the quality of the services provided by
the facility.
Transmission-Based Precautions
Although the spread of infectious disease in hospitals has been recognized for many years,
understanding about how to prevent infections and implementing successful remedial policies and
practices have not been easy to date.
Isolation guidelines involve a two-level approach: (1) Standard precautions, which apply to all clients
and patients attending healthcare facilities, on the one hand, and (2) transmission-based precautions,
which apply primarily to hospitalized patients (Garner 1996). Actually, both approaches are too
interlinked to be used separately. Therefore, the relatively specific transmission-based precautions
should always be used in conjunction with the standard precautions.
Transmission-based precautions are for patients who are known or suspected to be infected or
colonized with infectious agents, including epidemiologically important pathogens that require
additional control measures to effectively prevent transmission. Because the infectious agent is often
not known at the time of admission to a healthcare facility, transmission-based precautions are used
empirically according to the clinical syndrome and the likely etiologic agents at the time. Later,
the course of management should be modified as soon as the pathogen is identified or a transmissible
infectious etiology is ruled out.
There are three main types of transmission-based precautions:
• Airborne precaution
• Droplet precaution
• Contact precaution
Note: For some diseases that have multiple routes of transmission, more than one transmission-based
precaution category can be used (e.g., influenza, Middle East Respiratory Syndrome-coronavirus [MERS-
CoV], varicella).
When used either individually or in combination, each route of transmission-based precautions are
always used in addition to the standard precautions. When transmission-based precautions are
indicated, efforts should be made to counteract possible adverse effects on patients (i.e., anxiety,
depression, and other mood disturbances, perceptions of stigma, reduced contact with clinical
staff, and increases in preventable adverse events to improve acceptance by patients and adherence
by HCWs).

Airborne Precautions
Airborne precautions prevent the transmission of infectious agents that remain infectious over long
distances (particles that are five μm or less in size, can remain in the air for several hours, and can be
widely dispersed). This transmission can occur either through airborne droplet nuclei or dust particles
containing the infectious microorganisms, which can be produced by coughing, sneezing, talking, or
by procedures (e.g., bronchoscopy or suctioning). Special air handling and ventilation are needed to
ensure the prevention of airborne transmission of infectious agents. Airborne particles do not land on
and contaminate surfaces. These precautions are effective in preventing such infections as
Mycobacterium tuberculosis, Chicken pox, and measles. They are recommended for patients with
either known or suspected infections that could be transmitted by airborne route. The precautions
include:
Patient Placement
Patients should be placed in airborne infection isolation room. An airborne infection isolation
room is a single-patient room that is equipped with special air handling and ventilation capacity
(i.e., a facility that could create negative pressure relative to the surrounding area, 12 air exchanges
per hour for new construction and renovation, and six air exchanges per hour for existing facilities,
air exhausted directly to the outside). In a setting where resources are limited, the air in the room
should be exhausted to the outside using a fan or other filtration system keeping the door closed at all
times.
• If a private room is not available, place patients in a room with patients having active
infection with the same disease, but with no other infection (cohorting).
• The staff on duty should check all visitors for susceptibility before allowing them to visit.
• Limit movements in and out of the room to HCWs caring for the patient.
• In areas where TB is prevalent, it is important to devise a mechanism to quickly assess
patients with suspected TB and put them under airborne precautions.
• Respiratory hygiene and cough etiquette to prevent the spread of respiratory secretions via
droplets expelled from the respiratory tract onto the hands and surfaces. This includes:
o Cover the mouth and nose when coughing and sneezing, and dispose of used tissues in
the nearest waste container.
o Perform hand hygiene after contact with respiratory secretions and contaminated
objects.
• Maintain an appropriate distance from and between symptomatic patients, at least one
meter (three feet).
• Identify persons with symptoms suggestive of acute respiratory illness and teach them to
use a surgical mask and practice cough etiquette.
During seasons of high transmission of respiratory diseases, screen patients for symptoms of
respiratory infections and provide a separate space in the waiting area distant from other patients (at

least one meter/three feet). Apply additional disease- or syndrome-specific transmission-based
precautions, as needed.
The transmission of SARS-CoV in emergency departments by patients and their family members
during the widespread SARS outbreaks in 2003, and subsequently Ebola in 2014, highlighted the need
for vigilance and prompt implementation of infection control measures in key healthcare setting areas
(e.g., reception and triage areas in emergency departments, outpatient clinics, and physician offices).
The strategy targets patients, accompanying family members, and friends with undiagnosed
transmissible respiratory infections, and applies the procedure to any person with signs of illness, such
as cough, congestion, rhinorrhea, or increased production of respiratory secretions on arrival at the
health facilities and afterwards. The term, cough etiquette, is derived from recommended source
control measures for M. tuberculosis.
Elements of Respiratory Hygiene/Cough Etiquette
• Education of healthcare facility staff, patients, and visitors.
• Posted signs, in language(s) appropriate to the population served, with instructions to
patients and accompanying family members or friends. Visual alerts are posted at the
entrance to and inside the outpatient facilities (e.g., emergency departments, physician
offices, outpatient clinics) with instructions to patients and persons accompanying them to
practice respiratory hygiene/cough etiquette, and inform a staff member of their symptoms
as soon as possible. Generally, a person having a cough should be provided with a mask.
• Source control measures (e.g., covering the mouth/nose with a tissue when coughing and
prompt disposal of used tissues, using surgical masks on the coughing person when
tolerated and appropriate).
• Hygiene of the hand after contact with respiratory secretions.
• Spatial separation, ideally more than three feet (one meter), of persons with respiratory
infections in common waiting areas, when possible. When possible, encourage people in
common waiting areas who are coughing to sit at least one meter/three feet away from
others.
• Covering sneezes and coughs and placing masks on coughing patients are proven means of
source containment that prevent infected persons from dispersing respiratory secretions
into the air.
• Restrict susceptible HCWs from entering the room of patients known or suspected to have
measles, chicken pox, disseminated zoster, or smallpox, if other immune HCWs are
available.
Use of PPE
• Wear a particulate respirator, such as a fit-tested N95 mask, and conduct a seal check
before entering the patient’s room (or use at least a surgical mask if particulate
respirator is not available). A seal check should be performed every time the N95 is used.

• In the case of chickenpox or measles, no mask is needed for immune persons, but
susceptible persons should not be allowed to enter the room.
• Remove the respirator or surgical mask after leaving the room and place it in a plastic
bag or waste container with a tight-fitting lid.
• Gown, gloves, and eye protection are not needed for many organisms transmitted
exclusively by the airborne route (such as M. Tuberculosis, measles) but may be needed
when an infectious microorganism is transmitted by multiple routes (e.g., varicella virus).
Patient Transport
Limit the transport of patients to essential reasons only, for example, diagnostic tests or therapeutic
procedures that cannot be performed in the room. If the patient needs to leave the room for a test or
procedure:
• Alert the department or facility where the patient is being transported so that they can
prepare to receive a patient on transmission-based precautions.
• Use PPE appropriately.
• Ensure that a patient on droplet or airborne precautions wears a surgical mask when
outside the patient’s room.
• Cover wounds with appropriate dressings.
• Clean and disinfect the wheelchair or coach after transportation.
• Remove PPE and perform hand hygiene once the patient has been transported.
Droplet Precautions
These precautions reduce the risks of transmission of pathogens spread wholly or partly by
droplets larger than five μm in size (e.g., Bordatella pertussis, H. influenza & N. Meningitides,
M. pneumonia, flu, mumps, and rubella viruses). Other conditions include diphtheria, pertussis,
pneumonic plague, and S. pharyngitis.
These pathogens remain in the air briefly and can travel about one meter (three feet) or less. Droplet
transmission requires close proximity or contact between the source and the susceptible host. Droplets
may also land on surfaces and then be transferred by contact transmission.
Patient Placement
• Private room, door can be left open. Patients should wear a surgical mask in waiting rooms
and when outside the patient’s room.
• If a private room is not available, place the patient in a room with a patient having
active infection with the same disease, not with another infection.
• If neither option is available, maintain over one meter (three feet) of spatial separation
between patient beds. Use of a physical barrier, such as a curtain or divider, is especially
important to prevent transmission by droplets.

• Limit the transport of patients to essential purposes only and notify in advance the area of
the receiving patients.
Use of PPE
• Wear eye protection and a face mask or face shield, which covers the eyes, nose, and
mouth completely, before entry into the patient care area.
• Remove PPE after leaving the patient care area. If PPE is to be reused, it must be cleaned
and disinfected before each reuse.
• Always perform hand hygiene before and immediately after patient care.
Cleaning
• Ensure that rooms of patients on droplet precautions are frequently cleaned and disinfected
(at least daily and before use by another patient). Focus cleaning on surfaces, frequently
touched items, and equipment in the immediate patient area.
• Use gloves, gown, and face/eye protection when cleaning patient care equipment and the
environment of a patient who has been on contact precautions.
Contact Precautions
Patients are placed on contact precautions when they have suspected or known infections that are
spread directly or indirectly from an infected or colonized individual by touch or contact with the
patient or the patient’s environment (surfaces and equipment). Contact is a common way that germs
spread in healthcare facilities. Organisms that require contact precautions include cholera; varicella-
zoster virus (shingles); neonatal or mucocutaneous herpes simplex virus; enterovirus meningitis;
patients infected or colonized with enteric pathogens; hemorrhagic fever viruses; multidrug-resistant
organisms, such as CRE; and C. difficile. Chicken pox is spread by both airborne and contact routes
at different stages of illness. Contact precautions should be implemented for patients with wet or
draining infection that may be contagious (e.g., draining abscesses, herpes zoster, impetigo,
conjunctivitis, scabies, lice, and wound infection).
Patient Placement
Isolate patients who require contact precautions in a single room, if possible. The door can be left open
in this case. If a private room is not available, place the patient in a room with a patient having active
infection with the same microorganism, not with another infection (cohorting). In multi-patient rooms,
more than one meter (three feet) spatial separation between patient beds is advised to reduce the
opportunities for inadvertent sharing of items between the infected/colonized patient and other patients.
Use of PPE
• Put on a clean, non-sterile gown and gloves on entering the patient care area; remove and
properly discard before exiting the patient room.
• Perform hand hygiene immediately after removing PPE.
• For semi-private or multi-patient rooms, do not use the same PPE between patients.

• Remove PPE, perform hand hygiene, and put on new PPE before coming in contact with
another patient or patient environment (e.g., bed, patient locker, over-bed table, IV stand).
Handwashing
• Involves HCWs cleaning their hands before, after, and at specific moments during patient
care and when performing healthcare tasks.
• Wash hands with antimicrobial agent or use alcohol hand rub before entering a room
and after removing gloves (if patient has C. difficile diarrhea, need to wash hands with
soap and water after removing gloves).
• Do not touch potentially contaminated surfaces or items before leaving the room.
Patient Transport
• Limit the transport of patients to essential purposes only.
• During transport, ensure that precautions are maintained to minimize the risk of
transmission of organisms (i.e., cover patient with a clean linen, not the linen that was
used on the patient’s bed).
Patient Care Equipment
• Use disposable or dedicated patient care equipment (e.g., blood pressure cuffs) and clean
and disinfect equipment before reuse on other patients.
Cleaning
• Ensure that the rooms of patients on contact precautions are frequently cleaned and
disinfected (at least daily and before use by another patient).
• Focus cleaning on toilets, frequently touched surfaces, and equipment in the immediate
patient area.
• Use gloves and a gown when cleaning patient care equipment and the environment of a
patient who has been on contact precautions.
• Organisms that form spores (such as norovirus and C. difficile) require cleaning products,
such as bleach, that inactivate spores, which are more difficult to destroy than vegetative
microorganisms.
Empiric/Syndromic Use of Transmission-Based Precautions
Every effort should be made to diagnose the microorganism responsible for infection; however,
laboratory diagnosis is not immediately available and not always available. In these circumstances,
precautions must be based on empiric/syndromic findings. If there is any question about whether a
patient without a known diagnosis has a specific infection, implement transmission-based precautions
informed by the patient’s signs and symptoms until a definitive diagnosis (i.e., laboratory test results)
can be made.

A complete listing of clinical syndromes or conditions warranting the empirical use of transmission-
based precautions is presented in table 3.1.
Table 3.1. Empiric use of transmission-based precautions (based on signs and symptoms) for isolation of a
patient in the hospital
Contact Droplet Airborne
Acute diarrhea in an incontinent or
diapered patient
Diarrhea in an adult with a history of
recent antibiotic use or hospitalization
(in settings with C. difficile)
Upper respiratory infections in infants
and young children (wear a mask, as
per standard precautions)
History of infection/colonization with
multidrug-resistant organisms (use
airborne precautions for TB)
Abscess or infected draining wound
that cannot be covered with bandages
Skin or wound infection with
excessive drainage in a patient with a
recent hospitalization (in settings
where multidrug-resistant
microorganisms are prevalent)
Symptoms of upper
respiratory infection; cough,
runny nose, sore throat,
congestion
Severe during periods when
pertussis is present in the
community
Suspected meningitis: fever,
vomiting, and stiff neck,
persistent cough.
Hemorrhagic rash with fever
Generalized rash of unknown
cause
Chronic cough/fever/weight
loss/night sweats and upper
lobe chest findings
Cough or fever and chest
findings in a person who is
infected with HIV or at high risk
for HIV
Rashes (vesicles or pustules)
suggestive of varicella
Acute respiratory distress
syndrome when new respiratory
organisms are a risk in the
community
Vesicular rash (suspected
varicella) (wear gown, gloves,
and eye protection also)
Adapted from: Siegel, Rhinehart, Jackson, et al. 2007.
In all situations, transmission-based precautions must be used in conjunction with standard
precautions (Siegel, Rhinehart, Jackson, et al. 2007).
SUMMARY
To protect HCWs, patients, and visitors from acquiring infections during healthcare facility visits,
ensure compliance with standard precautions for all patients at all times, and apply transmission-based
precautions to all patients with potential or confirmed infections that are transmitted via contact,
droplet, and airborne routes.
Standard precautions, including hand hygiene, are the cornerstone of IPC. They provide the first line
of defense in the prevention of transmission of pathogens in healthcare facilities. Transmission-based
precautions, including their empiric use, are designed to provide additional protection, and reduce the
risk of transmission via airborne, droplet, and contact routes among hospitalized patients and HCWs.
These guidelines serve as the minimum requirements that should be enforced in all healthcare settings
to protect patients, visitors, and HCWs.

BIBLIOGRAPHY
CHAPTER 3: STANDARD AND TRANSMISSION-BASED PRECAUTIONS
human T-lymphotropic virus type III/lymphadenopathy-associated virus in the workplace. MMWR, 34(45): 681‒
686; 691‒695. https://www.cdc.gov/mmwr/preview/mmwrhtml/00033093.htm.
Ducel, G. 1995. Les nouveaux risques infectieux. Futuribles, 203:5‒32.
https://www.futuribles.com/en/revue/203/les-nouveaux-risques-infectieux/.
LeClaire, JM, Freeman, J, Sullivan, BF, et al. 1987. Prevention of nosocomial respiratory syncytial virus
infection through compliance with glove and gown isolation precautions. New England Journal of Medicine,
317(6):329‒334. https://pubmed.ncbi.nlm.nih.gov/3600729/.
Siegel, JD, Rhinehart, E, Jackson, M, et al. 2007. 2007 Guideline for isolation precautions: Preventing
transmission of infectious agents in healthcare settings. https://www.cdc.gov/niosh/docket/archive/pdfs/niosh-
219/0219-010107-siegel.pdf.
Tietjen, L, Bossemeyer, D, McIntosh, N. 2003. Infection prevention: Guidelines for healthcare facilities with
limited resources. Baltimore, MD: Jhpiego Corporation. https://pdf.usaid.gov/pdf_docs/Pnact433.pdf.

Chapter 4: Hand Hygiene 64
CHAPTER 4: HAND HYGIENE
Key Topics
• When to perform hand hygiene (WHO’s “5 Moments for Hand Hygiene”)
• Proper technique for washing hands with soap and water
• Proper technique for use of ABHR
• Issues and considerations related to hand hygiene
• Monitoring hand hygiene
• WHO’s strategy for improving hand hygiene programs
BACKGROUND
Hand hygiene is the single most important measure to prevent the transmission of infection and is the
cornerstone of IPC. The original study in this field was conducted at a maternity hospital in Vienna,
Austria in 1847. This study demonstrated that the mortality rate among mothers was significantly
lower when the HCWs cleaned their hands with an antiseptic agent (Semmelweiss 1861). Numerous
other studies since then have demonstrated that HCWs’ hands become contaminated during routine
care of patients and can transmit infectious diseases from patient to patient (Association of
periOperative Registered Nurses [AORN] Recommended Practices Committee 2004; Duckro, Blom,
Lyle, et al. 2005; Ojajarvi 1980; Pittet, Dharan, Touveneau, et al. 1999; Riggs, Sethi, Zabarsky, et al.
2007; Sanderson and Weissler 1992). Proper hand hygiene can prevent the transmission of
microorganisms and decrease the frequency of HAIs. Despite evidence that hand hygiene prevents
the transmission of infections, compliance with hand hygiene recommendations during patient care
continues to present ongoing challenges in all settings. Methods used to improve compliance with
hand hygiene are addressed later in this chapter.
The goal of hand hygiene is to remove soil, dirt, and debris, and reduce both transient and resident
flora. Hand hygiene can be performed using ABHR or by washing the hands with water and plain or
antimicrobial soap (bar or liquid) that contains an antiseptic agent, such as chlorhexidine, iodophors,
or triclosan (WHO 2009a).
Traditionally, handwashing with soap and water has been the primary method of hand hygiene;
however, ABHR has been shown to be more effective for standard hand hygiene than plain or
antimicrobial soaps (CDC 2002). However, ABHR effectiveness is best achieved when hands are not
visibly soiled. Recommendations for when and how to perform hand hygiene are described in this
chapter.
“Failure to perform appropriate hand hygiene is considered to be the leading cause of healthcare associated
infections (HAIs) and the spread of multidrug resistant microorganisms, and has been recognized as a
significant contributor to outbreaks.”
Boyce, Pittet, the Healthcare Infection Control Practices Advisory Committee 2002

When to Perform Hand Hygiene (Hand Hygiene Opportunities)
WHO has five recommended points in time when hand hygiene should occur to prevent transmission
of HAIs. These recommendations are called the “My 5 Moments for Hand Hygiene” and focus on the
following times:
• Before making contact with a patient
• Before performing a clean/aseptic task, including touching invasive devices
• After performing a task involving the risk of exposure to a body fluid, including touching
invasive devices
• After patient contact
• After touching equipment in the patient’s surrounding areas (WHO 2006a)
The “5 Moments” are numbered according to healthcare workflow in an attempt to ease recall for
HCWs (table 4.1).
Table 4.1. WHO’s five recommended moments for hand hygiene
1 BEFORE
PATIENT
CONTACT
WHEN? Clean your hands before touching a patient when approaching him or
her.
WHY? To protect the patient against harmful germs carried on your hands.
2 BEFORE
ASEPTIC TASK
WHEN? Clean your hands before any aseptic task.
WHY? To protect the patient against harmful germs, including the patient’s
own germs entering his or her body.
3 AFTER BODY
FLUID
EXPOSURE RISK
WHEN? Clean your hands immediately after exposure risk to body fluids (and
after glove removal).
WHY? To protect yourself and the healthcare environment from the patient’s
harmful germs.
4 AFTER PATIENT
CONTACT
WHEN? Clean your hands after touching the patient and his or her immediate
surrounding and leaving the room.
harmful germs.
5 AFTER
CONTACT WITH
PATIENT
SURROUNDING
WHEN? Clean your hands after touching any object in the patient’s immediate
surroundings, when leaving. Even without touching the patient.
harmful germs.
Source: WHO 2020
• Other Opportunities for Hand Hygiene
• Immediately on arrival and before departure from work (the health facility)
• Immediately after touching contaminated instruments or articles
• Before putting on gloves and after removing them

• Whenever the hands become visibly soiled after nasal blowing or following a covered
sneeze
• Before touching the face (eyes, nose, or mouth)
• Before and after cleaning the environment
• Before and after preparing food
• Before eating and drinking or serving food
• After visiting the toilet
Hand Hygiene for Patients and Patient Caretakers and Visitors
• Patients, their caretakers, and visitors should also be instructed on proper hand hygiene
with alcohol rub or soap and water, as indicated.
• Opportunities for hand hygiene by patients, caretakers, and visitors include:
o Before eating
o After using the toilet
o Before and after handling their babies
o Before and after helping to care for patients
o When hands are soiled
Hand Hygiene Methods
Handwashing with Soap and Water
The purpose of routine handwashing in healthcare is to remove dirt and organic material, and
microbial contaminants from the hands. Clean water must be used to prevent microorganisms in the
water from contaminating the hands. However, water alone is not effective at removing substances
containing fats and oils, which are often present on soiled hands. Proper handwashing also requires
soap, which is rubbed on all hand surfaces, followed by thorough rinsing and drying.
The cleansing activity of handwashing is achieved by both friction and the detergent properties of the
soap. Plain soap has minimal antimicrobial properties, but assists with the mechanical removal of
debris and loosely adherent microbes, while the mechanical action removes some bacteria from the
hands. Time is also an important factor—handwashing for 30 seconds has been shown to remove 10
times the amount of bacteria as handwashing for 15 seconds. The entire handwashing procedure, if
completed properly, as described step by step in figure 4.1, should take 40–60 seconds (CDC 2002;
WHO 2009a).

Figure 4.1. The steps for routine handwashing (How to properly wash your hands)
Source: WHO 2009c
Handwashing with soap and water is recommended (rather than using ABHR) in the following
situations:
• If the hands are visibly soiled or contaminated with blood or body fluids
• After using the toilet
• Before eating

• To remove the buildup of emollients (e.g., glycerol) on the hands after repeated use of
ABHR
• In outbreaks of C. difficile, but not in healthcare settings with only a few cases of C.
difficile (Cohen, Gerding, Johnson, et al. 2010; Siegel, Rhinehart, Jackson, et al. 2007). C.
difficile is a bacterial infection that causes severe diarrhea and is common in some settings.
Avoiding Contamination of the Hands During Handwashing
Because microorganisms grow and multiply in moisture and in standing water, the following are
recommended to prevent contamination of the hands during handwashing:
• Avoid bar soaps, when possible, because they can become contaminated, leading to
colonization of microorganisms on the hands. There is some evidence, however, that the
actual hazard of transmitting microorganisms through handwashing with previously used
bar soaps is negligible. If bar soap is used, provide small bars and use soap racks that drain
the water after use (WHO 2009a).
• Do not add liquid soap to a partially empty liquid soap dispenser. This is known as
“topping off.” The practice of topping off dispensers may lead to bacterial contamination
of the soap. Using refill packets avoids this problem, but if they are not available,
dispensers should be thoroughly cleaned and dried before refilling (WHO 2009a).
• Filter and/or treat water if a healthcare facility’s water is suspected of being contaminated;
this will make the water microbiologically safer (WHO 2009a). (See Volume 1, Chapter
11: Food and Water Safety, and Volume 2, Section 2, Chapter 5: Preventing Healthcare-
Associated Infectious Diarrhea.)
• Use running water for hand hygiene. In settings where no running water is available, water
“flowing” from a prefilled container with a tap is preferable to still-standing water in a
basin. Use a container with a tap that can be turned off, preferably with the back of the
elbow (when hands are lathered) and turned on again with the back of the elbow for
rinsing. As a last resort, use a bucket with a lid or a pitcher and a mug to draw water from
the bucket, with the help of an assistant, if available (WHO 2009a).
• Avoid dipping the hands into basins of standing water. Even with the addition of an
antiseptic agent (e.g., Dettol or Savlon), microorganisms can survive and multiply in these
solutions (Rutala 1996).
• If a drain is not available where hands are washed, collect water used from hand hygiene
in a bucket that is deep enough to prevent the dirty water from splashing out, and discard it
in a drain or in a latrine.
• Dry hands properly because wet hands can more readily acquire and spread
microorganisms. Dry hands thoroughly with a method that does not recontaminate the
hands. Paper towels or single-use clean cloths/towels are an option. Make sure that towels
are not used multiple times or by multiple individuals because shared towels quickly
become contaminated (WHO 2009a). Air-dry hands if disposable or single use towels are
not available. Do not dry hands on personal clothing.

Alcohol-Based Hand Rub
The antimicrobial activity of alcohol results from its ability to denature proteins (i.e., the ability to
dissolve some microbe components) and kill microbes. Alcohol solutions containing 60%–80%
alcohol are most effective, with higher concentrations being less effective. This paradox results from
the fact that proteins are not denatured easily in the absence of water; as a result, microorganisms are
not killed as easily with higher alcohol-based solutions (> 80% alcohol) (WHO 2009a).
The use of an ABHR is more effective in killing transient and resident flora than handwashing with
antimicrobial agents or plain soap and water. It also has persistent (long-lasting) activity. ABHR is
quick and convenient to use and can easily be made available at the point of care. ABHR usually
contains a small amount of an emollient (e.g., glycerol, propylene glycol, or sorbitol) that protects and
softens the skin. ABHR should be used at any of the “5 Moments” described earlier in this chapter,
unless hands are visibly soiled (CDC 2002; Girou, Loyeau, Legrand, et al. 2002; WHO 2009a).
To be effective, approximately 3–5 mL (i.e., one teaspoon) of ABHR should be used. The ideal
volume of ABHR to apply to the hands varies according to different formulations of the product and
hand size (refer to the manufacturer’s instructions for use). ABHR should be used following the steps
shown in figure 4.2 for approximately 20–30 seconds or until the solution has fully dried. Because
ABHR does not remove soil or organic matter, if the hands are visibly soiled or contaminated with
blood or body fluids, wash the hands with soap and water. To reduce the buildup of emollients on the
hands after repeated use of ABHR, washing the hands with soap and water after every 5–10
applications of ABHR is recommended.
In C. difficile outbreak settings, handwashing with soap and water is recommended over ABHR
because it is more effective than ABHR in removing endospores. If there are only a few cases of C.
difficile, normal use of ABHR is recommended (Cohen, Gerding, Johnson, et al. 2010; Siegel,
Rhinehart, Jackson, et al. 2007; WHO 2009a). The need for using soap and water over ABHR during
outbreaks of norovirus is an unresolved issue (Siegel, Rhinehart, Jackson, et al. 2007; WHO 2009a).

Figure 4.2. WHO recommendation on how to perform hand hygiene with ABHR
Source: WHO n.d.
Producing Alcohol-Based Hand Rub
An effective ABHR solution is inexpensive and simple to make, even in resource-limited settings.
WHO provides procedures for making ABHR in healthcare facility pharmacies (box 4.1).

Box 4.1. Alcohol-based hand rub formulation
Formulation 1: To produce final concentrations of ethanol 80% v/v, glycerol 1.45% v/v, hydrogen peroxide
(H2O2) 0.125% v/v:
Pour into a 1,000-mL graduated flask:
1. Ethanol 96% v/v, 833.0 mL
2. H2O2 3%, 41.7 mL
3. Glycerol 98%, 14.5 mL
Top up the flask to 1,000 mL with distilled water or water that has been boiled and cooled; shake the flask
gently to mix the contents.
Formulation 2: To produce final concentrations of isopropyl alcohol 75% v/v, glycerol 1.45 v/v, hydrogen
peroxide 0.125% v/v:
Pour into a 1,000-mL graduated flask:
1. Isopropyl alcohol (with a purity of 99.8%), 751.5 mL
2. H2O2 3%, 41.7 mL
3. Glycerol 98%, 14.5 mL
Top up the flask to 1,000 mL with distilled water or water that has been boiled and cooled; shake the flask
gently to mix the contents.
v/v=volume percent, meaning 80 parts absolute alcohol in volume and 20 parts water measured as volume,
not as weight
Source: WHO 2009a
Do not add ABHR to a partially empty dispenser. This practice of “topping off” dispensers may lead
to bacterial contamination. The use of refill packets avoids this problem, but if they are not available,
the dispensers should first be thoroughly cleaned and dried before refilling (WHO 2009a).
Antiseptic Soaps
Antiseptic soaps can be used in place of plain soap during the “My 5 Moments for Hand Hygiene”
described above, but are not recommended for most settings. Handwashing with antiseptic soap is
more irritating to the skin and more expensive than using ABHR. Therefore, if available, ABHR
should be used under normal circumstances (WHO 2009a).
Use of antiseptic soaps is recommended for surgical hand scrub and before entry into special areas of
healthcare facilities (e.g., neonatal ICUs).
Surgical Hand Scrub
The purpose of the surgical hand scrub is to mechanically remove soil, dirt, debris, and transient flora
microorganisms, and to reduce resident flora before and for the duration of surgery. The goal is to
prevent wound contamination by microorganisms from the hands and arms of the surgical team
members.

Issues and Considerations Related to Hand Hygiene
Glove Use
Although the effectiveness of gloves in preventing contamination of HCWs’ hands has been
confirmed, gloves do not provide complete protection against hand contamination. Contamination
may occur as a result of small, undetected holes in gloves and during glove removal. Therefore,
wearing gloves does not replace the need for proper hand hygiene. Hand hygiene should always be
performed before putting on and after removing gloves. (See Volume 1, Chapter 5: Personal Protective
Equipment, for details on correct glove use) (CDC 2002; WHO 2002).
Wearing the same pair of gloves and cleaning gloved hands between patients or between dirty and
clean body sites is not a safe hand hygiene practice (Siegel, Rhinehart, Jackson, et al. 2007; WHO
2009a; WHO 2009c; WHO 2009d). Not changing gloves between patients has been associated with
the transmission of microorganisms, such as MRSA and gram-negative bacilli. Reprocessing gloves
is not recommended.
Every effort must be made to reinforce the message that gloves do not replace the use of hand hygiene
and that when gloves are required, they should be used in addition to hand hygiene. (See Volume 1,
Chapter 5: Personal Protective Equipment, for more information on glove use.)
Hand Lotions and Hand Creams
In an effort to minimize hand hygiene-related contact dermatitis (a skin rash caused by irritation from
a substance, such as soap, due to frequent hand hygiene), hand lotions, creams, barrier creams, and
moisturizing skin care products are recommended. Hand lotions and creams often contain humectants
(substances that help retain moisture) and various fats and oils. The humectants can increase hydration
and replace altered or depleted skin lipids that can serve as a barrier to microorganisms on normal
skin. Several studies have shown that regular use (i.e., at least twice per day) of such products can
help prevent and treat contact dermatitis. There is also biologic evidence that emollients (e.g., glycerol
and sorbitol) contained in ABHR, with or without antiseptics, may decrease cross-contamination
because they reduce shedding of bacteria from the skin for up to four hours. These products are
absorbed into the superficial layers of the epidermis and are designed to form a protective layer that
is not removed by standard handwashing (Boyce, Pittet, the Healthcare Infection Control Practices
Advisory Committee 2002; McCormick, Buchman, Maki 2000; WHO 2009a).
Therefore, although the use of hand lotions, creams, and moisturizers by HCWs should be encouraged,
there are some considerations. First, to reduce the possibility of the products becoming contaminated,
provide small, individual-use containers or pump dispensers, which are completely emptied and
cleaned before being refilled. Refilling or topping off lotion containers may lead to contamination and
proliferation of bacteria in the lotion. Second, to avoid confusion, hand lotion dispensers should not
be located near dispensers of antiseptic solutions. Moreover, oil-based barrier products, such as those
containing petroleum jelly (e.g., Vaseline® or lanolin), should not be used because they damage latex
rubber gloves.

Resistance to Topical Antiseptic Agents
With the increasing use of topical antiseptics, especially in home settings, concern has been raised
about the development of resistance to these antiseptics by microorganisms. Although low-level
bacterial tolerance to commonly used antiseptic agents has been observed, studies have shown no
clinical evidence to date that supports the development of resistant microorganisms following use of
any topical antiseptic agents (WHO 2009a).
Lesions and Skin Breaks
Cuticles, hands, and forearms should be free of lesions (e.g., ulcers, abscesses, and tumors), dermatitis,
eczema, and skin breaks (e.g., cuts, abrasions, and cracking). Broken skin should be covered with
waterproof dressings. If covering is not possible, HCWs with active lesions should not perform
clinical duties until the lesions are healed. In particular, surgical HCWs with skin lesions should not
operate until the lesions are healed.
Religious and Cultural Considerations
It is clear that cultural and religious factors strongly influence attitudes toward handwashing. During
efforts to enhance hand hygiene compliance, it is advisable to consider possible religious and cultural
factors that may act as barriers to practice, and tailor promotional activities to address these issues.
WHO’s Guidelines on Hand Hygiene in Health Care provide information outlining these
considerations (WHO 2009a).
Fingernails
Research has shown that the area beneath the fingernails harbors the highest concentrations of bacteria
on the hands. This area most frequently harbors coagulase-negative staphylococci (a bacterium
normally found on the skin), gram-negative rods (bacteria known to cause infection), Corynebacteria
(bacteria), and yeasts. Fingernails longer than 0.2 cm (0.08 inches) have been shown to increase
carriage rates of S. aureus. Moreover, long nails, either natural or artificial, tend to puncture gloves
more easily than short nails. Therefore, nails should be kept moderately short —not extend more than
0.5 cm (0.2 inches) beyond the fingertip. (CDC 2002; Fagernes and Lingaas 2011; McGinley, Larson,
Leydon 1988; Olsen, Lynch, Coyle, et al. 1993; WHO 2009a).
Artificial Nails
Individuals with artificial nails have been shown to harbor more pathogenic organisms (i.e., disease-
causing microorganisms), especially gram-negative bacilli and yeast, on the nails and in the area
beneath the fingernails. Studies have demonstrated that the longer the artificial nail is, the more likely
that a pathogen can be isolated. Therefore, artificial nails (e.g., nail wraps, nail tips, acrylic
lengtheners) should not be worn in clinical areas because they constitute an infection risk in high-risk
areas (Hedderwick, McNeil, Lyons, et al. 2000; Jumaa 2005; Siegel, Rhinehart, Jackson, et al. 2007).

Nail polish
There is concern that individuals wearing nail polish may be hesitant to perform rigorous hand hygiene
in an effort to protect their nails, although no studies have demonstrated a relationship between freshly
applied nail polish and infection. However, compromises in hand hygiene technique may lead to
transmission of infection. Chipped nail polish supports the growth of a larger number of organisms
on fingernails compared with freshly polished or natural nails. Also, dark-colored nail polish may
prevent dirt and debris under fingernails from being seen and removed (Baumgardner, Sallese
Marago, Walz, et al. 1993; CDC 2002; Rothrock 2006). The recommendation is that health workers
avoid using dark-colored nail polish when providing patient care.
Jewelry
Current evidence demonstrates that wearing rings increases hand contamination. Research has also
shown that HCWs wearing wristwatches had a higher total bacterial count on their hands compared
with HCWs without wristwatches. Surgical team members should not wear rings because it may be
more difficult for them to put on surgical gloves without tearing them (Fagernes and Lingaas 2011;
Siegel, Rhinehart, Jackson, et al. 2007; Trick, Vernon, Hayes, et al. 2003). Rings with ridges or stones
should be avoided because of the greater difficulty in cleaning effectively, and the increased likelihood
of damage to gloves and injury to patients. If plain wedding rings are worn, they should be moved up
and down during hand hygiene for more effective cleaning.
In summary, HCWs should adhere to the following to ensure effective hand hygiene practices:
• Keep nails short, clean, and without polish or artificial nail extensions.
• Do not wear wrist watches and jewelry, including wearing rings with ridges or stones.
• Cover any cuts or abrasions with waterproof dressings.
• Keep sleeves short or rolled up.
Hand Care
Hand care is important to protect the skin from drying and cracking. Cracked skin may encourage
microbial colonization and broken areas can present a site of entry for pathogens. Hand creams can
be applied to care for the skin on hands.
Communal tubs of hand cream must be avoided because they may contain bacteria over time, and lead
to contamination of the hands.
Note: The following are recommendations for hand care to prevent irritation due to frequent hand hygiene
(based on WHO hand care recommendations [WHO 2009a]).
• Develop a regular routine of using a protective hand cream or lotion, at least daily.
• Do not routinely wash hands with soap and water immediately before or after using an
ABHR.
• After hand rubbing or handwashing, let your hands dry completely before putting on gloves.

• Use ABHRs with emollients rather than detergent-based soaps.
• Select efficacious products with the least potential for irritation.
• Avoid unnecessary prolonged glove use.
• Dry hands completely after washing and before gloving.
• Avoid rough paper towels; pat rather than rub dry.
• Don’t use soaps, detergents, or aqueous creams or lotions containing sodium lauryl sulfate.
• When skin is damaged or frequent handwashing is required, a mild soap (without
antiseptic agent) should be used to remove soil and debris.
• In high-risk areas, such as the operating room, neonatal ICU, or transplant units, hand scrub
protocols that use soft brushes or sponges for a shorter time (at least two minutes) should
replace harsh scrubbing by hard brushes for six to ten minutes.
Monitoring Hand Hygiene
WHO’s Guidelines on Hand Hygiene in Health Care encourage providers in all healthcare settings to
evaluate, improve, and monitor the reliability of hand hygiene practices with the aim of changing the
behavior of HCWs. Optimizing hand hygiene compliance at the five recommended moments for hand
hygiene increases PS (WHO 2009a; WHO 2009e).
Hand hygiene compliance can be monitored both directly and indirectly (table 4.2) (WHO 2009a).
Each method of monitoring hand hygiene has its own advantages and disadvantages (table 4.3).
However, the direct observation of hand hygiene compliance by a validated observer is considered
the “gold standard” in hand hygiene monitoring. It is often valuable to use more than one method of
monitoring at the same time (The Joint Commission 2009; WHO 2009a).
Validity and reliability are important aspects of direct hand hygiene monitoring. The validity of a new
observer should be confirmed by either joint observations with another confirmed observer or by being
tested through the WHO Training Film: A Tool to Help Convey the Concept of the “5 Moments for
Hand Hygiene” to Health-Care Workers (http://www.who.int/gpsc/media/training_film/en/), which is
available online. Results should be compared and any discrepancies should be discussed. This process
should be repeated until the HCW is fully competent (WHO 2009a).
Validity: Doing a procedure technically correctly following the “gold standard” for that procedure. Reliability:
Completing a procedure technically correctly at all times following the “gold standard” for that procedure.
Table 4.2. Hand hygiene observation methods
Direct methods of hand hygiene observation Indirect methods of hand hygiene observation
Direct observation Monitoring consumption of products (soap or ABHR)
Patient assessment Automated monitoring of the use of sinks or ABHR
dispensers
Source: WHO 2009a

In the implementation of a hand hygiene monitoring program, expectations for performing hand
hygiene should be clearly defined and made known in the healthcare facility. Policies detailing these
expectations should also be in place. Monitoring should occur on a regular, routine basis, and a set
minimum number of observations should be collected in a given monitoring period.
Table 4.3. Advantages and disadvantages of various hand hygiene monitoring approaches
Monitoring approach Advantages Disadvantages
Direct observations by
expert observers
Only way to reliably capture
all hand hygiene opportunities
Details can be observed
Unforeseen qualitative issues
can be detected while
observing hand hygiene
Time-consuming
Skilled and validated observers required
Prone to observation, observer, and selection
bias
Self-reports by HCWs Inexpensive Overestimate of true compliance
Not reliable
Direct observations by
patients
Inexpensive Potential negative impact on patient-HCW
relationship
Reliability and validity required and remain to
be demonstrated
Consumption of
hygiene products
(e.g., towels, soap,
and ABHR)
Inexpensive
Reflects overall hand hygiene
activity (selection biased)
Validity may be improved by
using indirect denominators
(e.g., patient-days or
workload that is converted
into total hand hygiene
opportunities)
Does not reliably measure the need for hand
hygiene (denominator)
No information about the appropriate timing of
hand hygiene actions
Prolonged stocking of products at ward level
complicates and might jeopardize the validity
Validity threatened by increased patient and
visitor usage
Not able to discriminate between individual or
professional group usage
Source: WHO 2009a
Direct Monitoring
The goal of the direct hand hygiene observation is to observe HCWs during their usual patient care
activities. The observers should assess the HCWs’ compliance with indications for hand hygiene and
with facility policies on hand hygiene practices. It is preferable that observers have training and
experience as patient care professionals but this is not essential.
Hand hygiene observations should focus on the two essential parameters for determining hand hygiene
compliance:

1. The indication for hand hygiene
2. The observed hand hygiene action related to the indication
When the HCW is observed, the action is considered to have been either “performed” or “not
performed” (WHO 2009).
WHO recommends that the “5 Moments” be used as a framework for observing opportunities for hand
hygiene. It is possible, however, to simplify which moments are observed, based on the objectives of
the period of observation and/or the resources available. Observation can be limited to certain
professional role categories or disciplines or certain indications in the “5 Moments” (e.g., in some
settings it may be appropriate to observe the action of hand hygiene only before and after contact with
the patient or the patient environment) (WHO 2009; WHO 2009a).
Observations should be collected in a standard way, such as on a form (Appendix 4A) with each hand
hygiene observation session on a separate form. A standard form should have three main sections:
• A header containing information about the healthcare facility and the location in the
facility where the session was completed.
• A second header containing information on the session observed.
• Columns below the headers representing the sequence of actions for different HCWs
observed during the same session, with each column representing one HCW. (See
Appendix 4A for the WHO Observation Form.) (WHO 2009a; WHO 2009e)
Content can be adapted to suit the needs of the facility. Appendix 4B is a sample observation form for
hand hygiene data collection. This form reflects a modified approach that looks at hand hygiene
compliance at room entry and room exit only (useful for areas with single-patient rooms).
Hand hygiene compliance (%) is the simplest way to analyze the hand hygiene data collected. Hand
hygiene compliance is the ratio of the number of actions to the number of opportunities:
Compliance (%) = (# of hand hygiene actions/Total # of opportunities) x 100
Compliance data can be summarized based on total compliance by a HCW, by role or discipline (e.g.,
doctors, nurses), or by location (e.g., ward A, ward B), depending on the objectives of the monitoring
program. It is important to provide feedback and disseminate compliance data to the HCWs and
leaders after the observation session/assessments are completed. Minimizing the delay between
observation and reporting of results may help increase the effects of the monitoring (WHO 2009a).
There are some limitations with direct monitoring of hand hygiene. For example, HCWs may improve
or modify their behavior in response to being observed or studied, resulting in an overestimate of
compliance. Therefore, it is important to be aware of this effect when evaluating compliance rates.
Indirect Monitoring
Indirect hand hygiene monitoring, such as monitoring the consumption of hand hygiene products (e.g.,
soap, ABHR, paper towels) to estimate the number of hand hygiene actions is a less expensive
monitoring approach and can be useful in settings where resources for direct monitoring are limited.

However, this methodology requires validation to be most effective. One of the major limitations of
this type of indirect monitoring is that it is impossible to determine if the hand hygiene actions were
performed at the proper moment (WHO 2009a).
Implementation of a Multimodal Hand Hygiene Improvement Strategy
The WHO Multimodal Hand Hygiene Improvement Strategy identifies the key components to address
during the implementation of a hand hygiene improvement strategy (WHO 2009a; WHO 2009e). (See
Appendix 4C.) The components are:
• System change to ensure that infrastructure is in place, including the availability of ABHR
and access to a safe and continuous supply of water, soap, and towels to allow HCWs to
practice hand hygiene.
• Training and education of HCWs
• Monitoring of hand hygiene practices and provision of feedback
• Reminders in the workplace
• Creation of a safety culture
To implement these components, the guidelines detail five sequential steps, listed below, with each
step building on the activities and actions in the previous steps (figure 4.3). Rather than a linear
process, the five steps should be considered a cyclical process, with each cycle being repeated, refined,
and enhanced at least every five years. It is imperative to evaluate success factors and areas of
weakness in the program to achieve long-term sustainability and process improvement (WHO 2009a).
Figure 4.3. Five steps of the hand hygiene improvement strategy
Adapted from: WHO 2009a

Although complex, the hand hygiene improvement strategy lays the groundwork for the
implementation of a sustainable hand hygiene monitoring program. It is aimed at improving hand
hygiene compliance and increasing PS in the healthcare facility. The basic elements of each step
follow (WHO 2009a; WHO 2009e).
Step 1: Facility Preparedness
Assess and ensure the preparedness of the healthcare facility. Consider the following:
• Identify a person or team to coordinate the program.
• Identify HCWs and facility leadership who will play a major role in program
implementation.
• Obtain raw materials to produce ABHR at the healthcare facility’s pharmacy (if
necessary).
• Train observers on how to monitor hand hygiene practices.
• Train identified persons on how to calculate hand hygiene compliance.
Step 2: Baseline Evaluation
Include a baseline evaluation of hand hygiene practices, facility infrastructure, HCW knowledge, and
current beliefs about hand hygiene. Consider the following:
• Survey HCWs on their perceptions of hand hygiene (e.g., do they think that hand hygiene
is important, and/or effective, and/or necessary?).
• Survey HCWs on their knowledge of hand hygiene (e.g., do they know how and when to
perform proper hand hygiene?).
• Look for details in the healthcare facility’s structure that may help explain current hand
hygiene compliance (e.g., is there easy access to running water, sinks, and/or ABHR?).
• Monitor the use of soap and ABHR, if applicable.
• Collect baseline data on hand hygiene compliance.
• Make sure that ABHR and dispensers are available in time for the start of Step 3.
• Compile data on hand hygiene practices.
Step 3: Implementation
Implement the planned program. Consider the following:
• Share baseline data with HCWs.
• Distribute educational materials, hand hygiene guidelines, and/or policies to HCWs.
• Distribute ABHR to HCWs.
• Measure how much ABHR is used each month.

• Hold education and training sessions.
• Survey HCWs on their opinion of the ABHR (e.g., do they find it acceptable?).
• Continue to monitor hand hygiene compliance observations, if possible.
• Meet monthly with key HCWs involved with the hand hygiene program.
Step 4: Follow-Up Evaluation
Evaluate the short-term impact of the implemented hand hygiene program. Considered the following:
• Survey HCWs and healthcare facility leadership on their perceptions of hand hygiene
(e.g., Do they think that hand hygiene is important and/or effective and/or necessary?).
• Survey HCWs on their knowledge of hand hygiene (e.g., Do they know how and when to
perform proper hand hygiene?).
• Inspect the healthcare facility structure to determine whether there are any barriers to hand
hygiene compliance related to structural issues.
• Collect data on soap and ABHR use.
• Collect data on hand hygiene compliance.
• Complete data entry.
Step 5: Developing an Ongoing Action Plan and Review Cycle
Develop an ongoing action plan and review cycle. Consider the following:
• Review collected data and results carefully.
• Prepare a report on the findings of the entire program.
• Share information about the findings of the program with leadership and HCWs.
• Create a five-year plan of action to continue to improve and promote hand hygiene
compliance.
Modifying a Hand Hygiene Program
In situations where the complete implementation of the WHO hand hygiene improvement strategy is
not possible, due to either limited resources or time, a hand hygiene improvement team should focus
on the minimum criteria listed in table 4.4. These criteria ensure the achievement of each component
of the multimodal strategy and include the most pertinent steps of the program (WHO 2009a).

Table 4.4. Minimum criteria for implementation
Multimodal component Minimum criteria for implementation
1a. System change: ABHR Bottles of ABHR are positioned at the point of care in each ward or
given to HCWs.
1b. System change: Access
to safe, continuous water
supply and towels
There is one sink for at least every 10 beds; soap; running water; and
clean, dry towels available at every sink.
2. Training and education A program to update training over the short, medium, and long term is
established.
3. Observation and feedback Two periods of observational monitoring are undertaken: the baseline
evaluation and the follow-up evaluation.
4. Reminders in the
workplace
“How to” and “5 Moments” posters are displayed in all wards (e.g.,
patient rooms, health facility staff areas, outpatient areas, ambulatory
departments).
5. Institutional safety climate The Chief Executive, Chief Medical Officer/Medical Superintendent,
and Chief Nurse all make a visible commitment to support hand
hygiene improvement during program implementation (e.g., verbal
announcements and/or formal letters to health facility staff).
Source: WHO 2009f
Key Message
The hands of HCWs are a major source of transmission of nosocomial pathogens.
SUMMARY
Hand hygiene is the single most important measure to prevent the transmission of infection and is the
cornerstone of IPC. The goal of hand hygiene in healthcare is to prevent the transmission of infections
by removing bacteria from the hands at strategic “moments” during the care of patients. Hand hygiene
can be performed using ABHR or by washing the hands with water and soap. ABHR has been shown
to be more effective for standard hand hygiene than plain or antimicrobial soaps, and is more easily
available at the point of care. Despite evidence proving that hand hygiene prevents the transmission
of infections, compliance with hand hygiene recommendations during patient care continues to be
challenging in all settings and requires constant and ongoing efforts from IPC staff. WHO’s
Multimodal Hand Hygiene Improvement Strategy provides a guide for the implementation of a
sustainable hand hygiene program at healthcare facilities.
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Chapter 5: Personal Protective Equipment 85
CHAPTER 5: PERSONAL PROTECTIVE EQUIPMENT
Key Topics
• Types and uses of PPE
• Instructions for putting on and removing PPE
• Types of PPE to prevent transmission of infection during an outbreak
BACKGROUND
HCWs are confronted each day with the difficult question of how to work safely in the potentially
hazardous environment of healthcare facilities. Today, the most common occupational risk the
healthcare personnel face is due to contact with blood and body fluids during routine work, such as
cleaning, instrument processing, and patient care. This exposure to pathogens increases the risk of
getting HAIs and possible death. HCWs in some occupational settings, such as surgery and delivery
rooms, have a higher risk of exposure to pathogens than those in all other departments combined
(Gershon & Vlahov 1992; Gershon & Zirkin 1995). However, there is no area of clinical care practice
without risk of exposure to infectious substances. The use of risk-appropriate PPE is one of the
components of standard precautions, which refers to the wearing of protective barriers or clothing.
The use of PPE is ages old and has been reasonably helpful to protect patients or clients from
microorganisms that could be transmitted by medical staff and others working in the healthcare
setting. Lately, with the emergence of COVID-19, HIV/AIDS, HBV, HCV, and resurgence of TB in
many countries, including in Ethiopia, there is increased awareness of the importance of PPE for
protecting HCWs. Hospital administrators, supervisors, and HCWs need to be aware not only of the
benefits and limitations of specific PPE, but also of the actual role that PPE play in preventing
infection so that they can use them effectively and efficiently.
The basic principle behind wearing PPE is to get physical barrier/protection from pathogenic
microorganisms. PPE include gloves, masks/respirators, eyewear (face shields, goggles, or glasses),
caps, gowns, aprons, boots, and other items. The most effective barriers are made of treated fabrics or
synthetic materials that do not allow water or other liquids (blood or body fluids) to penetrate them.
However, these fluid-resistant materials are not widely available because they are expensive.
Lightweight cotton clothes (with a thread count of 140/inch) are materials most commonly used for
surgical clothing (masks, caps, and gowns) and drapes in many countries. Unfortunately, lightweight
cotton does not provide an effective barrier because moisture can pass through it easily, allowing
contamination.
On the other hand, denim, canvas, and heavy twill are too dense to allow steam penetration (i.e., they
cannot be sterilized), are hard to wash, and take too long to dry. When fabric is used, it should be
white or light-colored showing dirt and contamination more easily. To be effective, PPE must be
selected, worn, and removed correctly. The state of the PPE is also important for it to effectively
provide protection. For example, surgical gowns and drapes have proven to be effective for impending
wound infection only when dry. When wet, however, clothes act as a wick or sponge to draw bacteria
from the skin or equipment up through the fabric that can then contaminate a surgical wound.

Types and Uses of PPE
As a rule, PPE selection should be based on risk assessment. If there is risk of exposure to patients or
health workers, then the PPE or combination of PPEs appropriate for the identified risk should be
used. Effectiveness in protection is also dependent on the practice of correct procedures and adherence
to rules for wearing (putting-on) and removing (putting-off) the PPE. Table 5.1 shows the
use/application and effectiveness of PPEs to block transmission of microorganisms.
Table 5.1. How PPE blocks the spread of microorganisms
Where
microorganisms
are found (risk
assessment)
How
microorganisms
are spread
Barriers to stop
the spread of
microorganisms
Must be used for
(examples of
indications)
Who
the
barriers
protect
Healthcare staff
Hair and scalp Shedding skin or
hair
Cap Invasive procedures
where tissue beneath the
skin is exposed
Situation where splashing
or exposure of blood,
body fluids, secretions, or
excretions is likely
Service
provider and
patient
Nose and mouth Coughing, talking Mask (water
resistant),
Face (eyes nose
or mouth)
Splashing Masks, face shields,
goggles
Body, arm, and
skin
Shedding skin or
hair
Scrub suit, cover
gowns
Nose and mouth Coughing, talking Masks Situation that calls for
droplet transmission
Special masks
(N95)
When airborne
transmission is expected
Hands Touching Gloves with
handwashing or
alcohol hand
rubbing
When there is a
reasonable chance of the
hands coming into contact
with blood and other body
fluids
Patient
Feet and lower
legs
Splashes, spills
and sharp material
Closed boots or
closed-toe shoes
(open sandals
are not
acceptable)
Situation where
splashing or blood, body
fluids, secretions, or
Service
provider
Patient
Mucous
membrane and
non-intact skin
Touching Gloves Situation where there is
direct contact with a
mucous membrane and
non-intact skin
Service
provider and
patient
Blood and
body fluids
Splashing or
spraying
Gloves,
eyewear, mask,
drapes, and
apron
Invasive procedures where
tissue beneath the skin is
exposed
Situation where splashing
or exposure of blood, body
Service
provider and
patient
Touching (contact) Instrument
processing

Where
microorganisms
are found (risk
assessment)
How
microorganisms
are spread
Barriers to stop
the spread of
microorganisms
Must be used for
(examples of
indications)
Who
the
barriers
protect
Accidental
exposure to
contaminated
needles and
scalpel blades
Protective
footwear,
decontamination
and disposal; use
of a safe or neutral
zone during
surgery
fluids, secretions, or
Contaminated
items or waste
Infectious waste Utility gloves,
plastic bags, and
proper disposal
Collection, transportation,
and disposal of waste
Staff
Unprepared skin Touching Skin preparation,
drapes, gloves
Invasive procedures where
tissue beneath the skin is
exposed
Patient
Clinic or
hospital
environment
Touching Gloves
handwashing,
Appropriate
dressing
Environmental cleaning
and disinfection
Staff and
their
families
Source: Siegel, Rhinehart, Jackson, et al. 2007
PPE should be:
• Made available close to the point of use for easy accessibility.
• Stored neatly in a clean/dry area to prevent contamination until required for use.
• Preferably for single use; if reusable, there must be a clear policy and standard operating
procedure (SOP) for placement in bins after use, and removal for laundering and
recycling.
• Have an SOP for stock ordering and rotation to ensure that there is always an adequate
supply based on usage and that older items are always used first. Do not wait for stocks to
run out before ordering more.
Caps
Head covers are most commonly used as part of surgical attire in surgical and procedure areas. When
used, head covers or caps should be large enough to cover the entire scalp and hair (figure 5.1). Facial
hair is also required to be covered for surgical procedures in sterile areas (e.g., in the operating theater)
using a facial hair covering. They can be disposable or made of reusable cloth that can be laundered.
In the surgical and procedure areas, a new clean head covering should be worn each day and changed
sooner when soiled with blood or body fluids. The same standard and regularity of cleaning expected
for surgical scrubs should be applied when cleaning head/facial coverings (e.g., laundered at the
hospital and changed at least daily).
Caps are used to keep the hair and scalp covered so that flakes of the skin and hair are not shed on
the wound during surgery. Caps meant to be reliably protective should be large enough to cover all

the hair on the scalp. Head covers or caps are most often worn during surgery and in procedure areas
where a sterile field is required. They are not necessary for most other areas in the healthcare facility.
Head covers are not part of routine PPE for contact, droplet, or airborne precautions, but are used
during outbreaks for viral hemorrhagic fever (VHF). (See the section on use of PPE during outbreaks
of VHF at the end of this chapter.)
Figure 5.1 Surgical head coverings
Healthcare Workers Wear Caps
• To protect the patient from infection coming from the hair and scalp.
• To protect the staff from splashes and exposure to blood.
Patients Wear Caps
• To keep the sterile field during invasive procedures.
Protective Eye Wear
There are four different types of eye protection that are effective in preventing infection in healthcare
facilities (figure 5.2):
1. Goggles
2. Safety glasses
3. Mask with shield
4. Face shield
Eye protection should be comfortable, allow for sufficient peripheral vision (i.e., the area that is visible
outside the central area of focus), and must be adjustable to ensure a secure fit. Compared with older
styles of goggles, newer styles may provide better indirect airflow properties to reduce fogging,
provide better peripheral vision, and offer more size options for fitting goggles to different HCWs.
Eye wear protects staff during an accidental splash of blood or other body fluid by covering the eyes.
Masks and eyewear should be worn when performing any task where an accidental splash into the
face could occur (e.g., performing cesarean sections, vaginal delivery, or cleaning instruments) when

giving care to patients with droplet precautions. If face shields are not available, goggles or glasses
and a mask can be used together.
Eye and face protection must be worn when there is risk of splashing body fluids into mucous
membranes (e.g., eyes/nose). Eyes can be protected by wearing either goggles or a visor. If reusable
eye/face protection is used, it should be decontaminated in accordance with the manufacturer’s
guidelines. Hands should always be decontaminated after removing the equipment.
Note: Personal eyeglasses and contact lenses are NOT considered adequate eye protection (Siegel,
Rhinehart, Jackson, et al. 2007)
Suitable protective eye/face equipment should:
• Be part of standard precautions.
• Be part of droplet precautions to protect from respiratory secretions.
• Be used during procedures and surgery when splashing is likely to happen.
• Be used during specimen collection or aerosol-generating procedures on patients with
specific respiratory tract pathogens (e.g., TB or novel respiratory viruses) (WHO 2008b).
• Cover the entire face area (e.g., face shield) if protection of the mouth and nose area is also
required.
• Be changed if visibly soiled.
• Be removed using the earpieces/headband to avoid touching potentially contaminated
surfaces.
• Be disposed of after use if single-use or placed in a receptacle for reprocessing.
• Fit over personal glasses; antifog properties should be considered.

Figure 5.2. Different types of eye protection equipment
Source: Tietjen, Bossemeyer, & McIntosh 2003
How to Wear Protective Eyewear
Put on eye protection after putting on the isolation gown and mask (if used) but before putting on
gloves (figure 5.3).
Figure 5.3. Putting on eye protection
Removal of face shields, goggles, and masks can be performed safely after gloves have been removed
(figure 5.4). The ties, earpieces, and/or headband used to secure the equipment to the head are
considered “clean” and safe to touch with bare hands. If the ties, earpieces, and/or headband are found
to be contaminated, they should be removed using gloved hands, and the skin/face should be rinsed
using ample running water and soap. The front of a mask, goggles, and face shield is considered
contaminated.

Figure 5.4. Taking off eye protection
Masks
There are many different types of masks used to cover the mouth and nose. Masks made from cotton
or paper are comfortable but are not fluid-resistant (do not protect from splashes) and are not an
effective filter to prevent inhalation of microorganisms transmitted via droplet nuclei (≤ 5 µm). Masks
made from synthetic materials provide protection from large droplets (> 5 µm) spread by coughs or
sneezes. They may be more difficult to breathe through than cotton or paper masks. The use of masks
during patient care is part of standard precautions when there is a potential for splashes or droplet
transmission, and is part of droplet precautions (Siegel, Rhinehart, Jackson, et al. 2007).
There are two types of masks (figure 5.5):
• Surgical masks: Regulating bodies (such as United States Food and Drug Administration
[FDA], the European Union, and WHO) require surgical masks to have fluid-resistant
properties.
• Procedure/isolation masks: These are not regulated, and they do not have any
specifications for their manufacture.
Surgical Masks
Masks should be large enough to cover the nose, the lower part of the face, the jaw, and all facial hair.
They are worn in an attempt to retain/confine moist droplets expelled as health workers or surgical
staff speak, cough, or sneeze. Equally important is their protective function against accidental
splashes of blood or other contaminated body fluids on the health workers’ nose or mouth. This
preventive function is only effective if the masks are made of fluid-resistant materials.
When removing, one should handle the masks by the strings; remove it with great care because the
center of the mask is the most contaminated part (Rothrock, Mcowen, Smith 2003).
Respirators
These are special types of masks called particulate respirators worn by healthcare personnel for
protection against inhalation exposure to airborne infectious agents that are < 5μm. They include
infectious droplet nuclei from patients with Micobacterium tuberculosis, Variola virus (smallpox),
SARS-CoV, and dust particles containing infectious particles, such as spores of environmental fungi
(e.g., Aspergillus sp.). Respirators should be worn when filtering inhaled air is deemed important.
These articles contain multiple layers of filter material and fit tightly onto the face allowing no air
leaks around the mask when breathing. The N95 disposable particulate and air purifying respirator

is the type used most commonly by healthcare personnel. Other respirators used include N-99 and N-
100 particulate respirators; powered air-purifying respirators with high-efficiency filters; and non-
powered full-face piece electrometric negative pressure respirators (Siegel, Rhinehart, Jackson, et al.
2007).
Figure 5.5. Types of masks
Gowns
Gowns should fully cover the torso of the HCW, fit comfortably over the body, and have long sleeves
that fit snuggly at the wrists.
There are three types of protective gowns used in healthcare facilities:
1. Isolation gowns
2. Surgical gowns
3. Coverall suits (See the section on use of PPE during outbreaks of VHF at the end of this
chapter.)
Isolation gowns should be long-sleeved, fluid-resistant, single-use, and preferably disposable.
Isolation gowns are designed to prevent contamination of the HCW’s arms, exposed areas of the body,
and clothing from blood, body fluids, and other potentially infectious material.
Note: Isolation gowns should be worn in combination with gloves and other PPE, as recommended.
Surgical gowns are sterile and preferably fluid-resistant, with sleeves that either taper gently toward
the wrists or end with elastic or ties around the wrists. Large, droopy sleeves are not recommended
because they can cause accidental contamination. Surgical gowns are used during surgery or
procedures to protect patients and the sterile field from microorganisms and from blood and other
body fluids (e.g., amniotic fluid) present on the HCW’s clothing, the front of the HCW’s body, and
the HCW’s arms.
When the surgical gowns are put on, the cuffs of sterile surgical gloves should completely cover the
end of the sleeves of the gowns.

Lightweight cloth or paper gowns are not recommended because they offer little protection against
moisture, which can easily pass through, allowing the passage of microorganisms. If a cloth or paper
gown is used, always wear a plastic apron under/over it.
If a protective covering fails (e.g., during a large spill) and skin/clothing becomes contaminated with
blood or body fluids, clothing should be removed and laundered immediately. The HCW should bathe
as soon as possible after completing the operation or procedure.
Coveralls are full-body suits made from materials that are lightweight, breathable, and impermeable
to liquids (figure 5.6). They should be worn by all HCWs who work in isolation areas for treating
highly infectious diseases (e.g., VHF). They are designed to go over a scrub suit and create a barrier
to eliminate or reduce contact exposure to blood, body fluids, and highly infectious microorganisms
(CDC 2016). Coveralls without an attached hood and with thumbholes are recommended.
Steps for putting on coverall suits
• Assess the garment for any visible tears or compromise to integrity.
• Make sure that a trained observer is watching and monitoring the steps.
• Perform hand hygiene.
• Put on the scrub suit, rubber boots, or shoe covers, and a pair of sterile or non-sterile gloves.
• Unfold the coverall suit and unzip.
• Slide legs, one by one, into the suit.
• Slide arms, one by one, into the suit.
• Tuck the cuffs of the first pair of gloves under the sleeves of the coverall suit.
• Insert thumbs into thumb hole (if provided).
• Close the zipper by pulling it up to the neck.
• Cover the zipper with the additional flap, if available .
Steps for removing coverall suits
• Make sure that a trained observer is watching and monitoring the removal process and is
ready to assist, if needed.
• Disinfect inner gloves using ABHR or 0.5% chlorine solution covering all surfaces of the
gloved hands.
• Lift the chin.
• Find the zipper at the level of the belly and carefully trace fingers of one hand up to find
the zipper tab.
• Hold the outside of the top of suit with the other hand (do not let it go).
• Unzip or unfasten the suit completely (still holding the top near the zipper).

• Gently pull the side of the suit being held partially over the shoulder.
• Perform a rotating movement of the shoulder inside out (one by one) to remove the
coverall and carefully move the coverall down the body, turning inside out.
• Do a “moon walk” to remove the legs of the suit over the boots.
• Carefully place it in the waste bag, touching only the inside.
• Avoid contact of the scrub suit with the outer surface of the gown.
• Disinfect gloved hands using ABHR or 0.5% chlorine solution, covering all surfaces of the
gloved hands.
• See the step-by-step PPE removal checklist for essential next steps in removal of PPE.
Figure 5.6. Coverall suit
When to Wear Gowns
The type of gown to use is based on the type of patient interaction, including the expected degree of
contact with infectious material, the potential for blood and body fluid penetration of the barrier, and
the type of task to be carried out by the HCW.
• During standard precautions, an isolation gown (with gloves) is worn if blood or body
fluid contact, spills, or splashes on clothing is expected.
• During contact and droplet precautions, an isolation gown (with gloves) is used to prevent
transmission of an infectious agent that cannot be prevented by standard precautions alone.
• During surgical procedures, deliveries, or other aseptic procedures, a sterile surgical gown
is worn to protect the sterile field and the clothes of the scrub team or those performing the
procedure.

How to Wear and Remove Gowns
Full coverage of the arms and body front, from the neck to the mid-thigh or below, will ensure that
clothing and exposed areas of the upper body are protected. Isolation gowns are always worn in
combination with gloves and other PPE (e.g., masks, eye protection) according to the type of
transmission being prevented (contact, droplet, etc.).
Isolation gowns are usually the first piece of PPE to be put on (figure 5.7A). HCWs should remove
isolation gowns before leaving the patient care area to prevent possible contamination of the
environment outside the patient care area (figure 5.7B) (Siegel, Rhinehart, Jackson, et al. 2007).
Figure 5.7. A and B. Putting on and removing an isolation gown
Adapted from: Siegel, Rhinehart, Jackson, et al. 2007
Plastic Apron
It is used to protect clothing or surfaces from contamination. Reusable aprons, which are made of
rubber or plastic, provide a waterproof barrier along the front of a person’s body. Therefore, it should
also be worn during cleaning and procedures with the likelihood of splashes or spillage of blood, body

fluids, secretions, or excretions (e.g., when conducting deliveries). Disposable water-proof aprons are
also available for clinical use.
Aprons keep contaminated fluids off the HCW’s clothing and skin. For example, during invasive
procedures, wearing a water resistant apron (disposable or reusable) will not only help guard the
healthcare provider against exposure to blood or body fluids (e.g., amniotic fluid), but also prevents
the HCW’s abdominal skin from being a source of contamination to the patient.
Gloves
HCWs wear gloves for three reasons:
1. To reduce the risk of staff acquiring infections from patients.
2. To reduce the risk of transmitting microorganisms, including skin flora from provider to
clients/patients.
3. To reduce contamination of staff’s hands by microorganisms that are transmissible from
one patient to another (cross-contamination).
Types of Gloves
Surgical glove should be used when performing invasive medical or surgical procedures.
Clean examination gloves provide protection to HCWs when performing many of their routine
duties. These gloves can be used when contact with mucous membranes and non-intact skin are
expected (e.g., during medical examinations and procedures, such as pelvic examination).
Utility or heavy-duty household gloves should be worn when processing instruments, equipment,
and other items; for handling and disposing of contaminated waste; and when cleaning contaminated
surfaces. Double gloving of either new examination gloves or reprocessed surgical gloves provide
some protection if utility gloves are not available.
Note:
A clear understanding of the parameters to opt for sterile or high-level disinfected gloves is important. Judicious
use of these options can reduce costs and at times maintain safety for both patients and staff.
The use of high-level disinfected surgical gloves when performing surgical or invasive procedures is the only
acceptable alternative on condition that sterile surgical gloves are not available.
Table 5.2 shows the advantages and disadvantages of different types of non-sterile gloves .

Table 5.2. Advantages and disadvantages of different types of non-sterile gloves
Material Advantages Disadvantages
Latex • Offers the best fit, natural feel, and dexterity
• Approved by regulatory authorities
• Provides protection against most chemicals,
including acids and bases, chlorine, iodine, and
formaldehyde
• Offers better puncture resistance than other
gloves (e.g., vinyl gloves)
• Long contact with fatty
substances (e.g., fatty tissue
and vegetable oils) will
disintegrate latex gloves
• Not recommended for HCWs
with known allergies to latex
Vinyl • First synthetic material gloves available on the
market
• Least expensive of the three types and generally
available in low- and middle-income countries
• Recommended if they are the only type of non-
sterile glove available and the risk of exposure to
blood and body fluids is high
• Acceptable for short procedures/tasks (e.g.,
suctioning endotracheal secretions, removing IV
lines) that involve minimum risk of glove tears,
have low risk of exposure to contaminants, and
involve minimal stress on the gloves
• Loose-fitting (i.e., baggy), have
limited elasticity, and tear
easily
• Have higher failure rates than
latex or nitrile gloves because
they tear more easily and they
are loose-fitting around the
wrist, which can allow fluids to
contaminate an HCW’s hands
Nitrile • Allergy-free
• Preferred choice for HCWs with latex allergies
• Made from synthetic materials and are very elastic
• Can be used with petroleum-based substances,
including hand moisturizers
• 3–5 times more puncture-resistant than latex
gloves
• Fit well on hands like latex gloves
• More elastic than vinyl gloves
• Available in various thicknesses and colors
• Not recommended for HCWs
with known allergies to nitrile
compounds
Source: Jhpiego, 2018
The best surgical gloves are made of latex rubber because of the rubber’s natural elasticity, sensitivity,
durability, and a comfortable fit. An increasing problem of allergies to latex these days created a
demand for another material. A new synthetic, rubber-like material called “nitrile,” which has
properties similar to latex, has been developed to make better gloves. This new glove material is less
likely to cause allergic reactions. In many countries, the only type of examination gloves available
is made of vinyl, a synthetic material that is less expensive than latex rubber. Although vinyl is
cheaper, it is inelastic (does not stretch like latex), making these gloves loose-fitting and easy to tear.
To conclude, the better quality examination gloves are made from latex or nitrile. They can be found
in medical supply stores in most countries. Utility gloves, which are made of thick rubber, are more
intractable and are meant for maximal protection during heavy duty activities.
Deciding which type of examination glove is best for a task (if a choice is available) largely depends
on the degree of risk from the exposure (low or high risk) to a potentially pathogen-laden blood or
body fluids; the length of the procedure to be carried out; and the possibility of the development of
an allergy to latex or, rarely, to nitrile.

Vinyl examination gloves should only be used for short tasks involving minimal stress on the glove
and low risk of exposure. If they are the only type of examination glove available and the risk
of exposure to blood and body fluids is high, frequent changing or double gloving should be
considered.
Natural rubber latex examination gloves provide the best protection. They are the most appropriate
for surgical procedures and tasks involving moderate to high risk, such as exposure to blood or body
fluids. These gloves should be avoided if staff have a known or suspected allergy to latex or for
prolonged contact (>1 hour) with HLDs, such as glutaraldehyde (because it may cause loss of
effectiveness due to the breakdown of latex).
Nitrile examination gloves are best for staff with a latex allergy and can be used for activities involving
moderate to high risk. Nitrile gloves have many of the characteristics of latex but have a better
resistance to oil-based products. Staff with a known allergy to nitrile or latex compounds should not
use these gloves.
Note: When using latex rubber gloves, avoid the use of hand creams or lotions that contain mineral oil,
petroleum jelly (Vaseline), or lanolin to protect your hands because they may cause the gloves to break down
within a few minutes.
When to Wear Gloves
Depending on the situation, surgical gloves, clean examination gloves, or utility gloves should be
worn by all staff when:
• There is a chance of the hands coming into contact with blood or other body fluids,
mucous membranes, or non-intact skin.
• They perform invasive medical procedures (e.g., inserting vascular devices, such as
peripheral venous lines).
• They handle contaminated waste items or touch contaminated surfaces.
The Glove Pyramid: an aid to decision making on when to wear (and not wear) gloves
Gloves must be worn according to STANDARD and CONTACT PRECAUTIONS. The pyramid
details some clinical examples in which gloves are not indicated, and others in which clean or sterile
gloves are indicated. Hand hygiene should be performed when appropriate regardless of the
indications for glove use (figure 5.8).

Figure 5.8. The glove pyramid
Source: WHO 2009b
When to Use Double Gloves
The transmission of HBV and HCV from surgeon to patient and vice versa is known to have occurred
even in the absence of incorrect application of the technique and apparent problems of intactness of
the gloves (Davis 2001). Even the best quality, new latex rubber surgical gloves may leak up to
4% of the time. Moreover, it was found that latex gloves gradually become weaker and lose their
intactness, especially when exposed to fat on the surfaces of wounds.
Surgical teams rely on surgical gloves as a barrier to protect themselves against blood-borne
pathogenic infections during surgery. Double gloving is adopted by surgeons to tackle the problem of
glove perforation. Glove perforations were detected in 10 of 112 sets of single gloves (8.9%) and 12
of 106 sets of outer gloves in the double-gloved group (11.3%). There was no inner double-glove
perforation (0%). Accordingly, the study concluded that double-gloving is effective in protecting

operating room nurses against blood-borne pathogen exposure. It should be introduced as a routine
practice (Guo et al. 2012).
When double gloving, the first glove should be a half size larger than normally worn gloves. The
second pair, however, should be the correct size because this will help prevent the hand from
cramping. Whether the surgeon, assistant, or nurse should double glove should be considered
carefully, especially in setups where gloves are reused and the risk of contracting bloodborne
pathogens, such as HIV, is high (>5% prevalence).
In general, for short duration surgical procedures (30 minutes or less) and those involving minimal
exposure to blood or mucous secretions (e.g., laparoscopy or minilaparotomy), double gloving is
probably not necessary.
When to Use Elbow Length Gloves
Elbow length gloves should be used during vaginal deliveries and cesarean sections when the chance
of coming in contact with blood is 25% and 35%, respectively. Elbow length gloves are also
recommended for use during such procedures as the manual removal of the placenta and any other
procedure where contact with a large volume of blood or body fluids is likely. This kind of glove is
generally meant to give protection to the hands, including the forearms.
How to Use Gloves
Although the effectiveness of gloves in preventing contamination of a HCW’s hands has been
repeatedly confirmed, wearing gloves does not replace the need for handwashing. The truth is that
even the best quality latex surgical gloves may have small and unnoticeable defects; they may be
torn during use; and the hands can become contaminated during removal (Davis 2001).
Note: The practice of hand hygiene, coupled with the use of protective gloves, is a key component in
minimizing the spread of disease.
The purpose of donning and removing sterile gloves, as shown in figure 5.9, is to ensure maximum
asepsis for patients and to protect the HCW from the patient’s body fluids. In the correct use of
gloves—a means to achieve this double goal—the skin of the HCW remains exclusively in contact
with the inner surface of the glove and has no contact with the outer surface. Any error in the
performance of this technique leads to a lack of asepsis, requiring a change of gloves.
Procedure for Wearing Sterile Gloves
1. Perform hand hygiene before an “aseptic procedure’’ by surgical hand scrub.
2. Check the package for intactness. Open the first non-sterile packaging by peeling it
completely off the heat seal (cover) to expose the second sterile wrapper, but without touching
it.
3. Place the second sterile package on a clean and dry surface without touching the surface.
Open the package and fold it toward the bottom so as to unfold the paper and keep it open.
4. Using the thumb and index finger of one hand, carefully grasp the folded cuff edge of the
glove.

5. Slip the other hand into the glove in a single movement, keeping the folded cuff at the
wrist level.
6-7. Pick up the second glove by sliding the fingers of the gloved hand underneath the cuff of the
glove.
8-10. In a single movement, slip the second glove on the ungloved hand while avoiding any
contact/resting of the gloved hand on a surface other than the glove to be donned
(contact/resting constitutes a lack of asepsis and requires a change of gloves).
11. If necessary, after donning both gloves, adjust the fingers and inter-digital spaces until the
gloves fit comfortably.
12-13. Unfold the cuff of the first gloved hand by gently slipping the fingers of the other hand inside
the fold, making sure that any contact with the outer surface of the glove is avoided (lack of
asepsis requiring a change of gloves).
14. The hands are gloved and must touch exclusively sterile devices or the previously- disinfected
patient’s body area.
15-17. Remove the first glove by peeling it back with the fingers of the opposite hand. Remove
the glove by rolling it inside out to the second finger joint (do not remove completely).
18. Remove the other glove by turning its outer edge on the fingers of the partially ungloved
hand.
19. Remove the glove by turning it inside out entirely (ball forming) to ensure that the skin of the
HCW is always and exclusively in contact with the inner surface of the glove.
20. Discard the gloves.
21. Perform hand hygiene after glove removal according to the recommended indication.
(See also figures 5.9, 5.10, and 5.11.)

Figure 5.9. How to don and remove examination gloves
Source: WHO 2009b

Donning surgical sterile gloves at the time of a surgical intervention follows the same sequence
except that:
• It is preceded by a surgical hand preparation.
• Donning of the gloves is performed after putting on a sterile surgical gown.
• The opening of the first packaging (non-sterile) is done by an assistant.
• The second packaging (sterile) is placed on a sterile surface and is then used for the
intervention.
• Gloves should cover the wrists of the sterile gown.
Figure 5.10. How to wear (don) sterile gloves

Figure 5.11. How to remove (doff) sterile gloves
Source: WHO 2009a

Some Dos and Don’ts about Gloves
• Do wear the correct size gloves, A poorly fitting glove can limit your ability to perform
tasks and may get damaged easily.
• Do change surgical gloves periodically (every 45 minutes) during long cases
because the protective effect of latex gloves decreases with time and inapparent tears
may occur.
• Do keep fingernails trimmed moderately short (less than 3mm beyond the fingertip) to
reduce the risk of tears.
• Do pull gloves up over cuffs of gown (if worn) to protect the wrists.
• Do use water-soluble hand lotions and moisturizers often to prevent hands from drying
and cracking due to frequent handwashing and gloving.
• Don’t use oil-based hand lotions or creams because they will damage latex surgical and
examination gloves.
• Don’t use latex gloves if you or the patients have an allergy to latex.
• Don’t store gloves in areas where there are extremes of temperature (e.g., direct
sunlight, near the heater, air conditioner, ultraviolet light, and X-ray machine). These
conditions may damage the gloves (cause breakdown of the material they are made of),
thus reducing their effectiveness as a barrier.
• Don’t reprocess gloves that are cracked or have detectable holes/tears.
• Don’t reprocess examination gloves for reuse.
• Reprocess utility gloves by immersing them in a 0.5% chlorine solution briefly,
remove gloves by inverting them, and then soak them in the 0.5% chlorine
solution for 10 minutes before washing and drying them for reuse.
Note: A separate pair of gloves must be used for each client to avoid cross-contamination or when moving
from one site to another site on the same patient (i.e., from respiratory care to a dressing change). It is
preferable to use new and single use (disposable) gloves only.
How to Make Elbow Length Gloves
When readymade elbow length gloves are not available, an effective alternative material (as
described below) can be easily made from previously used surgical latex gloves that have been
reprocessed (decontaminated, cleaned, and dried using the two methods of either sterilization or
HLD).
The acceptable “leak rate” for new surgical and examination gloves designated by regulatory
agencies is up to 4% (Davis 2001).
1. Cut one or more fingers completely off (depending on the size of your hands) each glove just
below where all the fingers join the gloves.

2. Sterilize or HLD two to three pair of cut-off (fingerless) gloves according to the
recommended process for each method, and store the gloves after final processing in a sterile
or high-level disinfected container until needed.
How to Use
• Perform surgical hand scrub.
• Put on the intact sterile or HLD surgical gloves to completely cover up the distal end of
the fingerless gloves (figure 5.12).
• Put the fingerless sterile or HLD gloves and pull them up to the forearms.
Figure 5.12. Cutting the four fingers off a glove
Allergic Reactions to Gloves
Allergic reactions to latex rubber gloves are being increasingly reported among HCWs of all types,
including housekeepers, laboratory workers, and dentists. If possible, non-latex (nitrile) or low-
allergen latex gloves should be used if an allergy is suspected. (Allergic reactions to nitrile also occur,
although less frequently.) Wearing powder-free gloves is recommended. (Powdered gloves may
result in more reactions because the powder from the gloves carries the latex particles in the air.) If
this is not possible, wearing clothes or vinyl gloves underneath latex gloves may help prevent skin
sensitization. It will not, however, prevent possible sensitivity of the mucous membranes of the eyes
and nose if these gloves are powdered (Garner 1996).
People with sensitivity do have symptoms, such as skin rashes, runny nose, and itchy eyes, which
may persist or get progressively worse (i.e., cause breathing problems, such as asthma). An allergic
reaction following the use of latex can develop within a month, or take many years to develop.

There is still no therapy or desensitization for a latex allergy. Therefore, the only option is to avoid
contact with it (Patriarca G. 2002).
Footwear
Footwear are worn to protect the feet from injury by sharp or heavy items or fluids that may
accidentally spill over, drip, or even pour out on them. All footwear should have closed toes, low
heels, and nonskid soles. Clean, sturdy shoes are recommended for all clinical areas. Rubber boots
or leather shoes provide the best protection. They must be kept clean. For this reason, sandals and
other open-toe shoes or shoes made of soft materials are not acceptable. Rubber boots or leather
shoes are acceptable, but they must be kept clean and free of contamination from blood or other body
fluid spills. Shoe covers are unnecessary if clean and sturdy shoes are available for dedicated use
only in the surgical area and are not meant to prevent transmission of bacteria from the floor.
However, shoe covers may be needed to prevent contamination of shoes with blood and body fluids
(AORN 2019; Bearman, Bryant, Leekha, et al. 2014).
Wash hands before and after donning and removing PPE
Instructions for Putting On and Removing Personal Protective Equipment
Putting on and removing PPE in the proper order and manner is just as important as wearing PPE.
Failure to properly put on or remove PPE could lead to exposure to or lack of protection against
infectious agents. The order of putting on PPE and removing PPE depends on the purpose for which
the PPE is being used. PPE is used for standard precautions, operating theaters, isolation rooms
during transmission-based precautions, and during disease outbreaks (e.g., novel respiratory disease,
VHF). (See the section on use of PPE during outbreaks of VHF at the end of this chapter.)
Choosing PPE for Standard and Transmission-Based Precautions
For the purpose of standard precautions, PPE are chosen based on the risk of exposure to blood or
body fluids during patient care. The choice could be simply a pair of non-sterile gloves if touching
contaminated surfaces; or gown, gloves, mask, and eye protection, if extensive splashing is expected.
For the purpose of transmission-based precautions, septic items of PPE are designated for each type
(e.g., only an N95 respirator if providing care to a suspected case of TB because airborne precautions
do not require the use of a gown or gloves). (For more information, see Chapter 3 for standard and
transmission-based precautions.) In case you need to wear multiple PPE, the sequence described
below should be followed for safely putting on and removing PPE. For details about putting on or
removing PPE, see the sections earlier in this chapter about each specific item of PPE.
Sequence for Putting on PPE for Standard and Transmission-Based Precautions
1. Put on protective boots or shoe covers (if needed).
2. Perform hand hygiene.
3. Put on a gown.

4. Put on a procedure mask/N95 respirator.
5. Put on goggles or a face shield.
6. Lastly, put on gloves.
Source: CDC 2004
Sequence for Removing PPE
PPE should be removed at the doorway before leaving the patient room or in the outer room:
1. Remove gloves.
2. Remove goggles/face shield by the “clean” headband or earpieces.
3. Remove the gown.
4. Remove the mask or respirator.
5. Dispose of single-use and reusable PPE in designated containers.
6. Remove shoe covers or boots (if used) before leaving the area.
Sequence for Putting on PPE for Sterile Surgical Procedures in the Operating
Theater
1. Change from street clothes to a clean scrub suit (one that has been processed in the healthcare
facility laundry). Remove all jewelry.
2. Put on non-skid, low-heel shoes with closed toes and back, rubber boots, or shoe covers when
there is a risk of gross contamination with blood or body fluids.
4. Put on a plastic apron if the sterile surgical gown is not fluid-resistant.
5. Put on a surgical head cover (and facial hair cover, if needed) to ensure that hair on the head
(and beard) are fully covered.
6. Put on a surgical mask, one that fits well and fully covers the mouth and the nose.
7. Put on appropriately sized, well-fitting goggles or a chin-length face shield.
8. Perform a surgical hand scrub using soap and water and ABHR (see Volume 1, Chapter 4:
Hand Hygiene).
9. Put on a sterile surgical gown without contamination (figure 5.7A).
10. Lastly, put on sterile surgical gloves without contamination (figure 5.7B).

Note: There may be instances where PPE to protect the HCW from infectious disease may be required, in
addition to surgical attire, such as a respirator for surgery on a patient with known or suspected TB, or
additional skin coverage for surgery on a patient with known or suspected VHF.
Sequence for Removing PPE Following Sterile Surgical Procedures in the Operating
Theater
1. Remove the gloves following the recommended steps and dispose of them in a waste
container; do not reprocess or reuse the gloves.
2. Remove the gown, avoid touching the outer side of the gown, and dispose of it in a waste
container (if a single-use gown) or place the used gown in a container for processing later.
3. Remove the plastic apron, if one was used, and dispose of it in a waste container (if a single-
use apron) or place the used apron in a container for processing later.
4. Remove eye protection.
5. Remove the surgical mask.
7. These steps will be performed at the end of the day unless any item becomes soiled.
8. Remove the head cover (and facial cover).
9. Remove shoe covers (if worn).
10. Remove shoes.
11. Remove scrub suit.
12. Lastly, perform hand hygiene.
Adapted from: AORN 2019

Source: CDC n.d.

Types of Personal Protective Equipment to Prevent Transmission During Disease
Outbreaks
List of Personal Protective Equipment
PPE recommended by WHO for HCWs who provide care and treatment to VHF patients include:
• Fluid-resistant coverall or gown
• Without an attached hood
• With thumb holes or loops
• Waterproof apron
• Waterproof boots
• Fluid-resistant isolation mask with a design that does not collapse against the mouth
• Face shield
• Respirator—required when performing aerosol-generating procedures is expected
• Head cover that covers the head and neck (separate from the gown or coverall)
• Double gloves with cuffs to mid-forearm (nitrile preferred over latex)
SUMMARY
The use of PPE is recommended to protect HCWs from hazards encountered during their regular,
daily duties. An adequate supply of PPE should be available for use at the point of care. Management
staff should be aware of when and how to replenish PPE supplies. In situations with limited resources,
PPE should be prioritized to provide the implementation of standard precautions, at a minimum. Staff
should be educated and trained on the indications for PPE, the benefits and limitations of specific
PPE, and the correct procedure for putting on, wearing, and removing PPE so that PPE can be used
effectively and efficiently. Healthcare facility support and feedback from supervisors are also
necessary to create sustained compliance with PPE guidance.
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Chapter 6: Sharps and Injection Safety 116
CHAPTER 6: SHARPS AND INJECTION SAFETY
Key Topics
• Magnitude of unsafe injection
• The risks and impact associated with unsafe injection practices
• Common reasons for prescribing and providing unnecessary and unsafe injections
• Unsafe injection practices: Transmission pathways
• The best practices in injection safety
• Role of the prescriber in injection safety
• Principles in safe injection practices
• Injection devices and their safety features
• Safe handling of medications containing vials (single and multiple dose vials)
• Sharps safety
BACKGROUND
WHO estimates that in developing and transitional Member States, 16 billion healthcare injections
are administered each year (i.e., an average of 3.4 injections per person yearly). Concurrently, it is
estimated that at least 50% of all injections are unsafe (WHO 2015).
Injection safety baseline studies conducted by FMOH and Making Medical Injections Safer in 2004
and 2005 showed that about 74% of injections were unsafe, about 72% of health facilities practiced
unsafe disposal, and the prevalence rate of needle stick injury was 30% to 35%. It is also reported
that almost one-half (45%) of the community members have a tendency to prefer injections to other
preparations (Habtetsion et al. 2009).
Improper use of syringes, needles, and medication vials during routine healthcare procedures, such
as administering injections, have resulted in more than 40 outbreaks in both hospital and non-hospital
settings with transmission of bloodborne viruses, including HCV.
A safe injection, as has already been briefly defined, does not harm the recipient, expose the provider
to any avoidable risk, and result in any waste that is dangerous to the community. Unsafe injection
practices, on the contrary, are ones that could harm the recipient, and/or the provider and/or may
result in waste that is dangerous to the community.
Magnitude of Unsafe Injection
Each year, 16 billion injections are given in developing and transitional countries.
Most of the injections are therapeutic (90% to 95%), whereas few (5% to 10%) are given for
immunization. The great majority (70%) of these injections are unnecessary and are given when oral
medications could have been prescribed (WHO, 2017).
A study of 40 health facilities using a combined survey/observation method found that about 74% of
the injections were unsafe. The fact that Ethiopian patients generally prefer injections to other forms
of medications further increases the risk of disease transmission. Injection providers (about 47%) are

known to believe that oral medications are less effective than injections for the treatment of fever
caused by minor illness (Habtetsion et al. 2009).
Risks and Impact of Unsafe Injection
Table 6.1. Conditions causing risks to communities, patients/clients, and providers
Communities Patients/Clients Providers
• Unsafe waste
disposal system of
health facilities
• Receiving
injections from
informal injectors
• Leaving sharps in
accessible place
to the public,
especially children
• Sharing needles
and syringes
• Reusing needles
and syringes
• Use of injections when there are other suitable
alternatives
• Applying pressure to bleeding sites with dirty
material or finger
• Drug administered at incorrect anatomical site.
For example
1. Infants vaccinated in the buttocks rather
than in the anterior-lateral thigh
2. Giving large boluses of intramuscular
injections
3. Injecting a nerve
• Use of unsterile syringes and needles (or use of
“new” but damaged compromised package)
• Reuse of syringe and needles
• Use of opened multi-use vials stored beyond
recommended time (contaminated drug use)
• Using wrong diluents or wrong amount
• Use of expired drugs
• Syringes are loaded with different medications
• Loading syringe with multiple doses
• Drugs and vaccines are stored in the same
refrigerator
• Accidental switching of drugs
• Health workers not following aseptic techniques
• Patient/client moves during administration of
injection
• Sharps are found in unexpected places, like
linen
• Self-medication
• Shortage or absence of
appropriate injection and
safety devices
• Carrying used needles
before disposal
• Placing needle on a
surface before disposal
• Recapping needles (either
one or two hand)
• Manually detaching
needles from syringes
• Manipulating used sharps
(cleaning, bending,
breaking, or cutting
hypodermic needle)
• Passing on sharps from
one health worker to
another
• Sharps are found in
unexpected places, like
linen
• Overfilling of sharps’
containers
• Using a syringe on an
agitated patient without an
assistant or patient/client
moves during
administration of injection
Risk to Patients
Unsafe injections can result in transmission of a wide variety of pathogens, including viruses,
bacteria, fungi, and parasites. WHO estimates that in low- and middle-income countries, 16 billion
healthcare injections are administered each year, translating to approximately three injections per
person per year, many of which are unnecessary. The reuse of syringes or needles, which is common
in many settings, exposes patients to pathogens either directly (via contaminated equipment) or
indirectly (via contaminated medication vials). The risks of unsafe injection practices have been well-
documented for the three primary bloodborne pathogens: HIV, HBV, and HCV. Worldwide, each
year, the overuse of injections and unsafe injection practices combine to cause an estimated:

• 8–16 million HBV infections
• 2.3–4.7 million HCV infections
• 80,000–160,000 HIV infections
(Hutin et al. 2003; Wilburn and Eijkemans 2004; WHO 2015)
Adverse effects are often caused by an unsafe injection. This is an incidence that harms a person
receiving healthcare caused by poor injection practices rather than the underlying disease that caused
the patient to seek treatment. Adverse events caused by an unsafe injection include:
• Transmission of bloodborne infections occurs due to inoculation of infectious agents
in the patient’s body. There are about 40 bloodborne pathogens that could be
transmitted via injection. Among them, HBV, HCV, HIV/AIDS are the most common
and have the gravest implications.
• Injection abscesses are inflammatory conditions, ranging from the initial signs of
inflammation to big swelling occurring from suppurative processes.
• Paralysis following the damage of a nerve as a result of injection of a drug into a nerve
and trauma.
• Drug/allergic reactions shock is a life threatening condition characterized by sudden
collapse of the circulatory system due to an immunological response to the injected drug,
or other local or systemic allergic reactions.
Risk to HCWs
Globally, in the course of their duties, HCWs are at an increased risk from bloodborne pathogens
because they handle sharps, including needles and syringes. It is estimated that 39% of HCV, 37%
of HBV, and 4.4% of HIV infection among HCWs worldwide are attributable to occupational
exposure to sharps injuries (Prüss-Üstün, Rapiti, Hutin 2005). Both patients and HCWs are at risk of
bloodborne disease from unsafe injection practices. Eliminating unnecessary injections and using
safe injection practices are the best ways to protect patients and staff from the risks.
Impact of Unsafe Injection
Unsafe injections have always been known to negatively affect people’s health, not only patients but
also care providers The health problems can range from simple to deadly ones (table 6.2).
Table 6.2. Proportion of infections and total burden of disease caused by unsafe injections
Infections Estimated burden of infections
due to unsafe injection practices
Estimated proportion of
infections due to unsafe injection
practices
HBV 22 million new cases 32%
HCV 2 million new cases 40%
HIV/AIDS 260,000 new cases 5%
Deaths in 2000 due to unsafe injection practices in the past, 501,000 deaths

Source: WHO 2017
• Socioeconomic: Each year, the annual global burden of indirect medical costs due to
HBV, HCV, and HIV/AIDS is estimated to be US$ 535 million.
• Psychosocial impact includes: Stigma, discrimination, and social isolation following
infections such as HIV; stress associated with HIV; burden on the family and the
community (unproductive, children will be orphans, etc.); and risk of transmitting
infections to the family and the community. The psychosocial impact can be seen at
individual, family, community, and country levels.
Common Reasons for Prescribing and Providing Unnecessary and/or Unsafe
Injections
1. Inadequate dissemination/promotion and use of standard treatment guidelines.
2. Prescriber’s predilection for injections. Lack of knowledge of the dangers of injections;
wrong perception that injections are more effective than oral medications; give more
rapid relief; and are more potent. These are some of the factors influencing the overuse of
injections. Other known factors are financial incentives for prescribing injections, fear that
patients will go elsewhere if therapy is given otherwise, or perceived belief that patients
prefer injections.
3. Informal providers giving injections.
Unsafe Injection Practices: Transmission Pathways
Double dipping is the reuse of a syringe that has been used to inject medication in a patient, to
withdraw medication from a multi-dose vial using a new needle, and injecting another patient with
the medication. This results in contamination of the medication in the vial and in the syringe.
Even if a new needle is attached, when this syringe is used on subsequent patients, patients can
become infected with bloodborne pathogens from contamination in the syringe. Even if a new needle
and new syringe are used for subsequent patients, they can become infected with bloodborne
pathogens from the contaminated liquid in the vial. Figure 6.1 shows the pathway of transmission of
bloodborne pathogens, in this case HCV, via unsafe injection practices.
Figure 6.1. Unsafe injection practices and disease transmission

Source: CDC 2008
Best Practices in Injection Safety
1. Elimination of Unnecessary Injections: A study conducted in Ethiopia revealed the most
commonly prescribed medications were antibiotics, analgesics, antispasmodics, and vitamins
(Habtetsion et al. 2009). All these medications were just as effective if they were given by
mouth. Many injectable medications have an oral equivalent that is equally strong, effective,
and much safer. Therefore, unnecessary injections should be reduced through:
• Promoting Rational Prescribing: Injections should only be used during life threatening
conditions, malabsorption syndromes, or inability to swallow.
• Educating the Patients: Encourage patients to accept oral medications; and explain the
risks associated with injections, when possible, to limit the use to only when necessary.
2. Administer Injections Safely
Make sure that the “right” things/ways are fulfilled when administering injections (table 6.3).
Standards for Administering Injections (table 6.3)
• Prepare a well-laid up tray, including emergency drugs for management or possible drug
reaction.
• Wash hands with soap and water. Alcohol could be used as a secondary step after soap
and water except for Expanded Programme on Immunization (EPI) injection.
• Dry the hands. You can use small paper towels or any single use towels.
• Check for the integrity of the vial/ampoule for the following: expiry date, breach,
leaks, particles, or any contamination.
• Make sure that the right dose, formulation, and route are used for the right patient
or client.
• For medications that need to be reconstituted (powder forms), it should be done
according to the manufacturer’s instructions, and use the correct diluents.
• Draw the right dose as prescribed, including expelling the air using the right injection
equipment.
• Ensure aseptic technique while giving the injection.
• Administer the drug at the correct site.
• Dispose of the used syringes and needles immediately in the sharp’s container. (Never
give used syringes and needles to patients or clients to carry home even if they came with
the equipment.)
• A patient should be kept in the room for at least five minutes after the injection has
been given and be observed for any possible adverse effect or events.

• Thank the patient or the client.
• Record the date and time of injection administration.
The Role of Prescribers and Providers in Injection Safety
Avoid unnecessary injections. Therefore, injections should only be used in:
• Life threatening conditions
• Malabsorption syndromes
• Inability to swallow
Prescribers and service providers should also:
• Encourage patients to accept oral medications, when possible.
• Injections should be given only when necessary.
• Explain the risks associated with injections.
• Explain to patients the need to take oral drugs as prescribed and review these instruction
with them.
• Inform patients about the potential side effects of the medications that are being
prescribed.
• Explore why the patients prefer injections.
Table 6.3. Right ways to give a safe injection
Rights Standards: Always check and verify
all “rights”
Method of verification
1. Right patient What is the name on the prescription?
Is this the right patient?
Ask patient/guardian, etc. to repeat
name.
2. Right drug Is the name of the drug on the
prescription the same as the
injection you are about to
administer?
Verify name of drug on prescription
with injection to be administered.
If you are unsure, verify with the
physician or pharmacist.
1. Right
formulation
Could the medication be given
orally instead of as an injection?
Discuss with patient the available
choices.
2. Right injection
equipment
Use only sterile, non-reusable
syringes, dental cartridge, etc.
Check to ensure that syringe/needle
package is unbroken.
3. Right dosage Check dosage against patient’s age,
weight, and the pharmacokinetics of
the drug.
Read the pharmaceutical
recommendations of the drug. If
unsure, verify with the
physician/prescriber.

Rights Standards: Always check and verify
all “rights”
Method of verification
4. Right time Follow the specific dose interval. Be mindful of the action of the drug
and why the time interval should be
followed.
Explain the importance of this to the
patient.
5. Right route Be sure to use the correct route of
administration (intra-muscular,
intravenous, intra-dermal, or
subcutaneous).
Observe the direction of the prescriber.
Check prescription or other
related records.
6. Right storage Right temperature, vaccine vial
monitor shake test
Check cold chain issues, including
vaccine vial monitor.
7. Right method
of disposal
Do not recap needle.
Dispose of used syringe and needle
immediately after use in appropriate
safety box.
or
Use the needle cutter and safety box.
Check the safety box for correct
method of disposal.
Principles of Safe Injection
Practices
Evidence-based safety practices can be divided into four major areas of intervention:
1. Use Sterile Injection Equipment
Single use syringe and needle for each injection is recommended. Auto-disable syringes are
mandatory for all immunization injections.
For curative and other purpose injections, syringes with reuse prevention devices and safety features
are recommended. Where these are not available, standard disposable syringes can be used. Studies
show that unsafe injection practices, such as using the same needle, syringe, or both for more than
one injection or improperly processed syringes and needles are responsible for the transmission of
HIV, HBV, and HCV (Drucker, Alcabes, Marix 2001). Therefore, after each use, the assembled
needle and syringe should be placed in a container for the disposal of sharps.
2. Prevent Contamination of Injection Equipment and Medications
• Prepare each injection in a clean designated area where blood or body fluid contamination
is unlikely.
• Use single dose vials rather than multi-dose vials.

• If multi-dose vials must be used, always pierce the septum with a sterile needle and avoid
leaving the needle in place in the stopper of the vial.
• Select pop-open ampoules rather than ampoules that require use of a metal file to open.
• If you are using an ampoule that requires a metal file to open, protect your fingers with a
clean barrier (e.g., small gauze pad) when opening the ampoule.
• Inspect the medications and discard those with visible contamination or breaches of
integrity (e.g., cracks, leaks).
• Follow product-specific recommendations for use, storage, and handling.
• Swabbing a new vial top or ampoule with an antiseptic or disinfect is unnecessary. If
swabbing with an antiseptic is selected for use, use a clean, single-use swab, and maintain
the product-specific recommended contact time. Do not use cotton balls stored wet in a
multiuse container.
• Swabbing of clean skin before giving an injection is unnecessary. Wash visibly soiled or
dirty skin with soap and water. If swabbing with an antiseptic is selected for use, use a
clean, single-use swab, and maintain the product-specific recommended contact time. Do
not use cotton balls stored wet in a multiuse container.
• Discard a needle that has touched any non-sterile surface.
3. Prevent Injuries to the Provider
Hypodermic needles (hollow bore needles) cause most of the injuries to HCWs at all levels of the
health system. Injuries may occur during procedures (clinicians), during cleaning and washing
(housekeepers), and handling of waste materials.
Precautions to take before an injection depend on the type of procedure being carried out.
• Anticipate and take measures to prevent sudden patient movement during and after an
injection.
• Do not recap, bend, or break needles before the disposal of single-use needles and
syringes after giving injections. However, if there is a need to recap a needle for various
reasons, the needle should be recapped using the “one-handed” recap method, as follows:
o First, place the needle cap on a firm and flat surface, and then remove the hand.
o Next, with one hand holding the syringe, use the needle to “scoop” up the cap
o (figure 6.2).
o With the cap now covering the needle tip, turn the syringe upright (vertical) so that
the needle and syringe are pointing toward the ceiling.
o Last, using the forefinger and thumb of your other hand, grasp the cap just above its
open end (figure 6.2) and push the cap firmly down onto the hub (the place where the
needle joins the syringe under the cap).

Figure 6.2. One-handed recap method
• Do not decontaminate the needle and syringe before disposal.
• Do not disassemble the needle and syringe after use.
• All used syringes and needles or any other sharps should be discarded at the point of use
in an enclosed sharps container that is puncture- and leak-proof and sealed before
being completely full.
• During injection, disposable gloves are indicated only if excessive bleeding is expected.
4. Prevent Access to Used Needles and Syringes
• Seal sharps containers for transport to a secure area in preparation for disposal.
After closing and sealing sharps containers, never open, empty, or reuse them.
• Manage/dispose of sharps waste in an efficient, safe, and environment-friendly way to
protect people from voluntary or accidental exposure to used injection equipment.
• Disposal of used syringes, needles, and sharps containers.
• The following guiding principles should be used for the disposal of syringes, needles, and
sharps containers:
o Dispose all sharps in a safety box immediately after injection.
o If the syringe is a retractable one, make sure to engage the retraction feature before
disposing of the syringe.
o Collect used syringes and needles at the point of use in an enclosed sharps container
(safety box) that is puncture- and leak-proof.
o Do not use boxes that are open, overflowing, or punctured. Get a new one instead.
Dispose safety boxes when they are three-quarters full.
o Dispose of the sharps and sharp containers by burning, burying, or encapsulation.
o Always put on heavy duty gloves when handling sharps containers.

Box 6.1. Best practices for administering injections
Select safe medicines
• Proper handling of medicines, including keeping them in a clean environment.
• Label them clearly.
• Observe proper storage conditions, including temperature and humidity (as recommended by
the manufacturer).
• Check the expiry dates.
Use of sterile equipment
• Use needle and syringe from a sealed package.
• Use syringes with reuse prevention features.
Avoid contamination (adhere to principles of aseptic technique)
• Wash hands.
• Prepare on a clean surface.
• Do not touch the part of the needle that will come into contact with the patient’s tissue and
avoid recapping. If recapping is necessary, apply the one hand technique.
• Do not leave the needle in the rubber cap of the vial.
Reconstitute drugs or vaccines safely
• Use a new sterile syringe and needle for each reconstitution.
• Use the correct diluents/water for injection.
• Reconstitute according to the manufacturer’s specifications.
Disposal of injection wastes and sharps properly
• Immediate disposal of the needle and syringe in a puncture- and leak-proof container.
Disseminate public health education and information
Source: FMOH 2012
Injection Devices and Their Safety Features
Syringes and needles are the major devices needed to provide injections. The following are
standard types of syringes used at healthcare facilities (table 6.4):
• Auto-disable syringe
• Manually retractable
• Automatically retractable
• Standard disposable

Both private and public health facilities should use the syringes and needles listed above to
provide any type of injection. After a n injection, the syringe and needle should be disposed in
a safety box.
Special Note:
All patients undergoing an injection should be counseled before the injection is given (e.g., on the type
of drug, side effects, possible adverse effects/events following the administration of the injection, and the
total number of doses to be given by injection).
Self-injecting patients, such as diabetic patients, should be properly informed about their medications and
how to ensure the safety of injection. If a patient needs to take the injection equipment home, he/she should
be counseled on the storage, disposal, and sterility of their drugs and equipment.
Table 6.4. Types of injection devices: Advantages and disadvantages
Type of Device Advantages Disadvantages
Auto-disable
syringes
• Cannot be reused
• They save time for HCWs from the
burden of sterilization
• Eliminate the patient-to-patient disease
transmission caused by the use of
contaminated syringes and needles
• More expensive than standard
disposable (but are still
affordable)
• Have no safety features
• Require a collection and disposal
system
Manually
retractable
• Cannot be reused
• Safety feature: needle retracts inside
the barrel
• Not automatic; relies on proper
actions of the HCW
• More costly
Automatically
retractable
• Cannot be reused.
• Automatic safety feature: needle
retracts inside the barrel
• Most costly
Standard
disposable
• Cheap
• Available in the local market
• Eliminate the patient-to-patient
disease transmission caused by the
use of contaminated syringes and
needles
• Can be reused without
sterilization
• Have no safety features
• Need sharps container or needle
remover
• Carry a high risk of infections
Source: FMOH 2012

Safe Handling of Vials Containing Medication (Single-Use and Multi-Dose Vials)
Practical Guidance on the Use of Safe Injection Devices
When using a sterile, single-use device (i.e., a syringe and hypodermic needle that are not separated
or manipulated unless necessary):
• Use a new device for every patient, including for withdrawing medication. This practice
is considered a basic IPC precaution and is promoted by the WHO (Safe Injection Global
Network) and the CDC, among others. Figure 6.3 shows the “ONE and ONLY
Campaign,” which advocates for one needle, one syringe, and only one use.
• Inspect the packaging of the device to ensure that the protective barrier has not been
breached.
• Discard the device if the package has been punctured, torn, or damaged by exposure to
moisture, or if the expiry date has passed.
Figure 6.3. ONE and ONLY Campaign
Source: WHO 2010
Practical Guidance on Handling Parenteral Medications
When giving a medication:
• ALWAYS follow the one needle, one syringe, one injection rule.
• DO NOT use a single-loaded syringe to administer a medication to several patients, even
if you change the needle every time between patients. See figure 6.1. Unsafe Injection
Practices and Disease Transmission in this chapter. (Always follow the one needle, one
syringe, one injection rule.)
• DO NOT use the same mixing syringe and needle to reconstitute several vials. See figure
6.1. Unsafe Injection Practices and Disease Transmission in this chapter.
• DO NOT combine leftover medications for later use.
• DO NOT use single-use vials for multiple patients, if possible.

When using single-use vials:
• Vials labeled by the manufacturer as “single-dose,” “single-use,” or “preservative-free”
should be used only for a single patient.
• There may be circumstances when the contents of single-use vials must be used for
multiple patients. In this situation, contents from an unopened single-use vial can be
repackaged one time into multiple single-use syringes for multiple patients. However, this
should be performed only by a trained HCW in an area away from patient care and in
accordance with strict IPC standards. Label as described below. Store for only 24 hours.
• Check that you have the right medication vial for the patient’s prescription.
• Double-check the expiration date, and if the vial has been previously opened, the current
date is within 24 hours of opening (unless a shorter or longer time frame is otherwise
specified by the manufacturer).
• Follow the principle of one syringe, one needle, one time.
• Discard the single-use vial after use.
• Discard a single-use vial:
o If sterility or content is compromised.
o If the expiry date or time has passed.
o If found to be undated, improperly stored, inadvertently contaminated, perceived to be
contaminated, or already punctured, regardless of expiration date.
When using multi-dose vials:
• If a multi-dose vial is assigned to a single patient (e.g., insulin pen), check that you have
the right vial for the patient.
• Double-check the expiration date and if previously opened, check that the vial is labeled
by the manufacturer as a multi-dose vial and the current date is within 28 days of
opening, unless a shorter or longer time frame is otherwise specified by the manufacturer.
• Follow the principle of one syringe, one needle, one time.
• Remove the needle cap and insert the needle tip until it touches the bottom of the bottle.
• When withdrawing medication from a multi-dose vial, avoid double dipping, this may
contaminate the contents of the vial and transmit infection to subsequent patients. See the
Needles and Syringes section in this chapter.
• If newly opened, label the multi-dose vial. See the Labeling section in this chapter.
• DO NOT store multi-dose vials in patient care areas where they could be inadvertently
contaminated.
Discard a multi-dose vial:
• If sterility or content is compromised.

• If the expiry date or time has passed (even if the vial contains antimicrobial
preservatives).
• If it is not properly stored after opening, or within 28 days of opening, unless a shorter or
longer time frame is otherwise specified by the manufacturer, or follow the
manufacturer’s instructions for the time the vial can be used once opened.
• If found to be undated, improperly stored, inadvertently contaminated, perceived to be
contaminated, or has a visible hole in the rubber septum, regardless of expiration date, if
thought to be a single-use rather than multi-dose vial.
Safe Preparation of Parenteral Medication
Injections should be prepared in a designated clean area, away from patient care, where
contamination by blood and body fluids is unlikely.
Practical Guidance on Setting Up for Preparing Injections
Three steps must be followed when preparing injections:
1. Keep the injection preparation area free of clutter so that all surfaces can be easily cleaned.
2. Before starting the injection session, and whenever there is contamination with blood or
body fluids, clean the preparation surfaces with a surface antiseptic, such as 0.5% sodium
hypochlorite solution, 70% alcohol (isopropyl alcohol or ethanol), or other suitable surface
disinfectant, and allow the preparation to dry.
3. Perform hand hygiene and assemble all equipment needed for the injection: sterile, single-
use needles and syringes; reconstitution solution, such as sterile water or a specific diluent;
alcohol swab or cotton wool; and a sharps container (WHO 2010).
Procedure for Vials with a Rubber Septum
Many vials have a rubber septum (stopper).
• Wipe the access rubber septum with 70% alcohol (isopropyl alcohol or ethanol) with a
swab or cotton-wool ball, and allow it to dry before piercing the vial or inserting a device
into the bottle.
• Use a new, single-use, disposable, sterile syringe and needle for each insertion into a vial.
• Never leave a needle in a multi-dose vial. This practice provides a direct route for
microorganisms, including HIV, to enter the bottle and contaminate the fluid between
each use.
• Once the loaded syringe and needle have been withdrawn from a multi-dose vial,
administer the injection as soon as possible.

Reconstitution
• Always use a sterile syringe and a sterile needle to withdraw the reconstitution solution
from an ampoule or a vial, insert the needle into the rubber septum in the single- or multi-
dose vial, and inject the necessary amount of reconstitution fluid.
• Remove the needle and syringe and discard them immediately as a single unit into a
sharps container.
• Mix the contents of the vial thoroughly until all visible particles have dissolved.
Delay in Administration
• If a dose has been withdrawn into a syringe and cannot be administered immediately for
any reason, cover the needle with the cap using a one-handed scoop technique. Do not
keep the medication longer than 24 hours unless a shorter or longer time frame is
otherwise specified by the manufacturer. Inject the medication as soon as possible after
withdrawing from the vial. See the next section on labeling (WHO 2010).
Labeling
After reconstitution of a vaccine or medication in a multi-dose vial (e.g., BCG vaccine), label the vial
and the final medication container with:
• Date and time of preparation
• Type and volume of diluent (if applicable)
• Final concentration
• Expiry date and time after reconstitution
• Name and signature of the person reconstituting the drug
For multi-dose medications that DO NOT require reconstitution (e.g., lignocaine), label the container
with:
• Date and time of first piercing of the vial
• Expiry date and time after reconstitution
• Name and signature of the person first piercing the vial
Procedure for Pop-Open Ampoules
• Whenever possible, use vials with a rubber septum. If not available, use pop-open
ampoules rather than ampoules that require use of a metal file to open. When opening
glass ampoules, always protect the fingers with a clean barrier, such as a small gauze pad
(figure 6.4).
• Pop-open vials cannot be stored for later use.
(Hutin et al. 2003)

Figure 6.4. Breaking open an ampoule
Source: Doyle & McCutcheon 2015
Safe Administration of Injections
Aseptic techniques should be followed for all injections.
Practical Guidance on Administering Injections
General
When administering an injection:
• Ensure that the patient is adequately prepared for and informed about the procedure.
• Check the drug chart or prescription for the medication and the five “rights”: right patient,
right drug, right dose, right route, right time.
• Perform hand hygiene.
• Wipe the top of the vial with 70% alcohol (isopropyl alcohol or ethanol) using a swab or
cotton-wool ball. Allow it to dry.
• Open the package in front of the patient to reassure the person that the syringe and needle
have not been used previously.
• Use a sterile syringe and needle to withdraw the medication from the ampoule or vial.
Important points
• DO NOT allow the needle to touch any contaminated surface.
• DO NOT reuse a syringe, even if the needle has been changed.
• DO NOT touch the rubber septum after disinfection with the 70% alcohol (isopropyl
alcohol or ethanol).
• DO NOT reenter a multi-dose vial with the same needle used for mixing or reconstituting
medications.
• DO NOT reenter a vial with a needle or syringe used on a patient if that vial will be used
to withdraw medication again (whether it is for the same patient or for another patient).

• DO NOT use bags or bottles of intravenous solution as a common source of supply for
injections (e.g., normal saline flushes) for multiple patients. These are not manufactured
as multi-dose and do not have any preservative.
Practical Guidance on Prevention of Sharps Injuries
• Do not bend, break, manipulate, or manually remove needles before disposal.
• Avoid recapping needles, but if a needle must be recapped, use a single-handed scoop
technique (figure 6.2).
How to Withdraw Medication Using an Auto-Disable Syringe?
WHO recommended several years ago that all immunizations be given using auto-disable syringes
to improve injection safety. Since then, auto-disposable syringes have been widely used in both
campaign and routine immunization settings. Although there are many types of auto-disable syringes,
they are all similar in that they only permit the syringe to be filled and be emptied once. Auto-
disposable syringes are a single-use, disposable syringe with a metal clip that locks the plunger after
a single use (i.e., it cannot be pulled back a second time). To use auto-disable syringes, end-users
need to be familiar with or to have a basic orientation.
• Open the sterile pack containing the needle and syringe, and attach the needle firmly.
• Remove the needle cap and insert the needle tip until it touches the bottom of the bottle,
as shown in figure 6.5. (To avoid drawing air into the syringe, the needle tip should stay
below the fluid level in the bottle.)
• Holding the bottle with one hand, slowly pull back on the plunger of the syringe and draw
up fluid to just above the fill line mark (figure 6.5). For the solo shot FX syringes used
with depot medroxyprogesterone acetate (DMPA), the “fill line” mark is at 1ml.
Figure 6.5. Withdrawing medication using an auto-disable syringe
Source: FMOH 2012
Withdraw the needle and syringe from the bottle and hold the syringe upright (needle pointing to the
ceiling) to see if any air is in the syringe. If there are air bubbles, slowly push the plunger in, but only
until the “fill line” mark is reached.

Check that the fluid level in the syringe is at or slightly above the “fill line” mark. If it is below the
fill line mark, there may not be enough medication to be effective and the injection should not be
administered. In this situation, either inject the medication back into the single dose bottle and draw
up the medication again using a new auto-disable syringe and needle, or discard the partially filled
syringe and use a new bottle and auto-disable syringe and needle.
Sharps Safety
Safety or Sharps Boxes
A safety or sharps box is a puncture- and leak-resistant container for the disposal of sharps, including
hypodermic needles, needles from IV bags, lancets, scalpels, and suture needles. It can be made of
thick cardboard or disposable plastic bottles with narrow necks (figure 6.6).
Categories of Sharps:
• Operating room-specific sharps requiring similar disposal include surgical drain trocars,
needle point cautery tips, wire sutures, orthopedic drill bits, and a range of hollow needle
injection.
• Special needles used by radiologists and anesthesiologists for various medically invasive
procedures.
• Routine use needles and other sharps (e.g., blades, pins).
Proper Management of the Safety Box
• Can be free-standing or fixed.
• Should be easily accessible to HCWs for easy disposal of needles.
• Should not be easily accessible to the public.
• Dispose of when three-quarters full.
• Use one box per defined area of need.
Figure 6.6. Standard safety box

Sharps Containers Dos and Don’ts
• Do put sharps containers as close to the point of use as possible, ideally within arm’s
reach.
• Do attach containers to walls or other surfaces if possible.
• Do mark them clearly so that people will not unknowingly use them for discarding
other items.
• Do place them at a convenient height so that staff can use and replace them easily.
• Do mark the fill line at the three-quarters full level.
• Don’t shake a container to settle its contents and make room for more sharps.
• Don’t place containers in high traffic areas where people could bump into them or be
stuck by someone carrying sharps to be disposed of.
• Don’t place containers on the floor or anywhere they could be knocked over or easily
reached by a child.
• Don’t place containers near light switches, overhead fans, or thermostat controls
where people might accidentally put their hand into them.
• Don’t put the following items on the sharp box: latex gloves, IV bags or extension tubes,
dressing materials (like adhesive tape and gauze), compresses, cotton pads, empty vials
and ampoules, or broken thermometers.
• Use of best practices can help prevent sharps injuries to HCWs.
Other Sharps Safety Dos and Don’ts
• Do wear gloves when using needles.
• Do discard needles with syringes and other sharps immediately after use.
• Do discard needles and other sharps in a sharps container.
• Do not walk around with needles and other sharps.
• Do use receivers to pass sharps to others and alert them before passing the sharps.
• Do not remove, bend, or break the needle.
• Do not recap needles after use.
• Do not leave sharps lying around the facility.
• Do not point needles and other sharps at yourself or others.

SUMMARY
Injection safety is:
• An integral component of IPC
• An element of standard precautions
• A key element of patient and HCWs safety
• Supported by IPC policies and procedures, such as hand hygiene, housekeeping, and
waste management.
Injections present risks to patients, HCWs, and the community, and should be limited when
alternative administration routes are available. Safe injection practices are one of the components of
standard precautions. A safe injection is one that does not harm the recipient, does not expose the
HCW to any avoidable risks, and does not result in waste that is dangerous for the community (Rapiti,
Prüss-Üstün, Hutin 2005). Safe injection practices include the proper use of single-use and multi-
dose vials. It is the responsibility of each HCW to ensure safe injection practices for every patient.
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Chapter 7: Decontamination and Reprocessing of Medical Devices (Instrument Processing) 139
CHAPTER 7: DECONTAMINATION AND REPROCESSING OF
MEDICAL DEVICES (INSTRUMENT PROCESSING)
Key Topics
• Level of disinfection or sterilization required
• Guideline for processing instruments
• Commonly used disinfectants
• Cleaning
• High-level disinfection
• Chemical disinfectants
• Preparation and packaging for reprocessing
• Processing of endoscopes
• Sterilization
• Safe transport and sterile storage
BACKGROUND
Because the prime concern of safety procedures is to protect both patients and staff from infection,
the transmission of infection from medical devices and equipment contaminated with a patient’s
body fluid is the focal area of interventions in health facilities. Instruments that are reused without
being properly processed and made safe are one of the causes of infections in developing countries.
HCWs are increasingly at risk of becoming infected with serious bloodborne viruses, such as HBV,
HCV, and HIV. Some research findings show that there are 8 to 16 million new infections of HBV
annually due to unsterile injections in developing countries. On the other hand, it was found that HIV
survives in needles and syringes up to 42 days depending on temperature and other factors (Abdala,
Stephens, Griffith, et al. 1999). Therefore, the greatest risk results from staff’s direct contact with
these life-threatening infections when they perform or assist with surgical procedures (physicians,
nurses, and midwives); process surgical instruments and equipment (staff); and perform
housekeeping and waste management tasks, including disposal of infectious waste items.
The basic IP processes recommended to reduce disease transmission from soiled instruments,
surgical gloves, and other reusable items are by way of, cleaning, and either sterilization or HLD.
Regardless of the type of operative procedures, the steps in processing surgical instruments and other
items are the same (figure 7.1).
In the effort to create an infection-free environment, it is important that the rationale for each
recommended IP process and their limitations be clearly understood by clinic staff at all levels, from
healthcare providers to cleaning and maintenance personnel. IP principles require that all reused
medical equipment be properly processed before reusing them to avert infections related to medical
equipment. Processing reusable instruments is not knowledge and technology intensive. Rather,
personnel need only simple and basic training on how to process them after procedures.
After completing an operation or invasive medical procedure or when still wearing gloves, the
physician or assistant should dispose of contaminated objects (gauze or cotton and other waste items)
in a plastic bag or leak-proof covered container. Disposable sharps (e.g., scalpel blades and
suture needles) should be placed in a sharps container. Afterwards, all reusable items should be

cleaned at the point of use (soaked in a solution of warm water and detergent to prevent blood from
drying on the surface of the items).
Following precleaning at the point of use, the instruments and reusable items are transported to an
instrument processing area, preferably centrally, where they should be thoroughly cleaned with
soap and water and be completely rinsed and dried.
Level of Disinfection or Sterilization Required
A rational approach for processing medical devices and surgical instruments for patient care was first
described by Earle H. Spaulding more than 50 years ago (Spaulding 1968) and it is still relevant in
making decisions about the final approach to instrument processing. Spaulding classified instruments
and patient care devices into three categories, based on how the device is used. Items are classified
as:
• Non-critical—come in contact with intact skin but not mucous membranes
• Semi-critical—come in contact with mucous membranes or non-intact skin
• Critical—come in contact with sterile areas of the body, including the vascular system
(table 7.1)
Table 7.1. Policy for the local decontamination of reusable equipment according to the Spaulding
classification
Risk category Level of
disinfection
Examples of medical device
High (critical)
Items that are involved with a
break in the skin or mucous
membrane or entering a sterile
body cavity
Sterilization Surgical instruments,
implants/prostheses, rigid endoscopes,
syringes, needles
Intermediate (semi-critical)
Items in contact with mucous
membranes or body fluids
Disinfection
(high level)
Respiratory equipment, non-invasive flexible
endoscopes, bedpans, urine
bottles
Low (non-critical)
Items in contact with intact
skin
Cleaning
(visibly clean)
Blood pressure cuffs, stethoscopes
Adapted from: WHO and PAHO 2016
Guidelines for Processing Items
In all steps, special attention should be given to proper handling of the instruments and other
items to minimize the risk of accidental injury or exposure to blood and other body fluids of the
sterile processing staff and to attain a high-quality end result.

Figure 7.1. Workflow for instrument processing and other medical devices
Each item, be it soiled or non-soiled metal instruments, requires special handling and processing to:
• Minimize the risk of accidental injury or exposure to blood or body fluids to the
cleaning and housekeeping staff.
• Provide a high-quality end product. Specific procedures for processing instruments,
equipment, and other items used to provide healthcare services are summarized in figure
7.1.
Commonly Used Chemical Disinfectants
Disinfectants are chemicals that destroy or inactivate microorganisms.
Properties of an Ideal Disinfectant
• Wide antimicrobial spectrum
• Rapidly kills microorganisms
STERILIZATION
Chemical
Soak time
depends on
the manu-
facturer’s
instructions
Steaming
Lid on 20
minutes
CLEANING
Thoroughly wash, rinse, and dry
Chemical
Soak time
depends on the
manufacturer’s
instructions
Autoclave
(Steam
sterilization)
Time, temperature,
and pressure depend
on the manufacturer’s
instructions
Dry Heat
Temperature
depends on the
manufacturer’s
instructions
Pasteurization
/ Boiling
Lid on 20
minutes
HIGH-LEVEL DISINFECTION
COOL Store
appropriately or
use immediately
POINT-OF-USE
CLEANING
(Occurs immediately after use)

• Active in the presence of organic matter and compatible with soaps, detergents, and other
chemicals encountered in use
• Non-toxic
• Does not cause the deterioration of cloth, rubber, plastics, and other materials
• Leaves an antimicrobial film on the treated surface
• Easy to use with clear label instructions
• Pleasant odor or no odor to facilitate its routine use
• Not prohibitively high in cost
• Soluble in water
• Stable in concentrate and at use-dilution
• Good cleaning properties
• Environmentally friendly on disposal
The most commonly used chemical disinfectants in healthcare settings are:
• Alcohols
• Chlorine and chlorine releasing compounds
• Sodium hypochlorite (chlorine bleach)
• Calcium hypochlorite or chlorinated lime
• Sodium dichloroisocyanurate
• Glutaraldehyde
• Iodine and iodophor solutions
• Hydrogen peroxide
Alcohols
Ethyl and isopropyl (2-propyl) alcohol (60% to 90%) are disinfectants that are relatively cheap and
commonly available. Their rapid action and absence of chemical residue make them ideal for
disinfection of many medical items. The activity of both alcohols, however, drops sharply when
diluted below 50%. To attain better results, the optimal concentration of the solution should be kept
between 60% to 90% with water (volume/volume).
Advantages
• Rapidly kill all fungi and bacteria, including mycobacteria. Isopropyl alcohol kills
most viruses, including HBV and HIV, whereas ethyl alcohol kills all viruses. Both are
also tuberculocidal (Rutala 1996).

• Rapid killing action
• Not corrosive to metal
• Less costly in comparison with other disinfectants
• Useful for soaking rubber or latex items occasionally
• Leave no chemical residue and, therefore, do not require rinsing
Limitations
• Evaporate rapidly making extended contact time difficult unless the items are immersed.
• Do not penetrate organic material and are easily inactivated.
• Are flammable.
• May swell or harden rubber and plastic materials if used repeatedly or for prolonged
periods of time.
• Damage shellac mounting of lenses in endoscopes.
Considerations for Use
• They are primarily used as antiseptic and as a low or intermediate-level disinfectant
(wiping oral and rectal thermometers and disinfecting external surfaces of equipment
[stethoscopes, cryoprobe tips, ultrasound probes, Ambu bags or anatomic models]).
• Should be stored in a cool and well-ventilated place because they are flammable.
Chlorine and Chlorine Releasing Compounds
Chlorine solutions are fast acting; Very active against most viruses, relatively cheap; and readily
available intermediate-level disinfectants. A major disadvantage is that concentrated chlorine
solutions (>0.5%) can corrode metals (WHO and PAHO 2016).
NOTE: CHLORINE SOLUTIONS SHOULD NOT BE USED FOR HLD
Hypochlorites are the most widely used chemicals among chlorine disinfectants and are available in
liquid (sodium hypochlorite) and solid (calcium hypochlorite and sodium dichloroisocyanurate)
forms. Chlorine-releasing compounds are available in powder (calcium hypochlorite or chlorinated
lime) or tablet form (sodium dichloroisocyanurate) (Rutala, Cole, Thomann, et al. 1998).

Soaking instruments in disinfectant before cleaning
According to the WHO and PAHO (2016), soaking instruments in 0.5% chlorine solution or any
other disinfectant before cleaning is not recommended for the following reasons:
• It may damage/corrode the instruments.
• The disinfectant may be inactivated by blood and body fluids, which could become a source of
microbial contamination and formation of biofilm.
• Transportation of contaminated items soaked in chemical disinfectant to the decontamination
area may pose a risk to HCWs and result in inappropriate handling and accidental damage. It
may contribute to the development of antimicrobial resistance to disinfectants.
Formaldehyde
Formaldehyde in both liquid and gaseous forms can be used for chemical sterilization and as a HLD
(Taylor, Barbeito & Gremillion 1969; Tulis 1973). A commercially available solution of
formaldehyde (Formalin), which contains 35% to 40% formaldehyde by weight, should be diluted
with boiled water (1:5) to a final solution containing about 8% formaldehyde. Despite its limitation,
formaldehyde continues to be used in many countries because both liquid and solid forms
(paraformaldehyde) are cheap and readily available. Its use in hospitals and clinics has persisted
for many years. Switching to a less toxic compound, such as glutaraldehyde or other newer HLDs,
is strongly recommended but difficult to implement because of the high cost of these alternatives.
Note: Formaldehyde is being used as a HLD and as a sterilant in Ethiopia, but it is slowly being phased out
globally because of its toxicity.
Advantages
• Not readily inactivated by organic materials.
• Can be used for up to 14 days.
• Can safely be used on surgical endoscopes (laparoscopes) because 8% formaldehyde
will not corrode metal or damage instruments lenses, plastics, or rubber.
Limitations
• Causes skin irritation.
• Is a potential carcinogen.
• Irritates the skin, eyes, and respiratory tract, even at low concentrations.
• For sterilization, 24 hours soaking in 8% formaldehyde solution kills all microorganisms,
including bacterial endospores.

This compound produces a dangerous gas (bis-chloroethyl-ether) when mixed with chlorine.
Glutaraldehyde
Glutaraldehydes are widely used for chemical sterilization and HLD of medical instruments.
Aqueous solutions are acidic (pH < 7) and are activated only when made alkaline. There are
many types of glutaraldehydes available worldwide. The most commonly used antiseptic is an
alkaline-stabilized 2% glutaraldehyde available commercially as Cidex® or Cidex 7®. These
chemicals, which are derivatives of formaldehyde, are also irritating, and their fumes are very
unpleasant. Therefore, they should be used only in well-ventilated rooms. Because the stability and
activity of glutaraldehydes vary considerably depending on how they are prepared and stored, the
manufacturer’s directions must be followed carefully.
Do not dilute this chemical unless specified in the manufacturer’s instructions.
Advantages
• Not readily inactivated by organic materials.
• Can generally be used for up to 14 to 28 days.
• Can safely be used on surgical endoscopes (laparoscopes) because it will not corrode
metal or damage lenses instruments (endoscopes), plastics, or rubber.
Limitations
• Can cause skin irritation or dermatitis with chronic exposure.
• Vapors are irritating to mucous membranes (eye, nose, and mouth) and respiratory tract.
• Works best at room temperature (20 °C to 25 °C or 68 °F to 77 °F).
• Is costly
Orthophthalaldehyde (OPA)
Orthophthalaldehyde (OPA) has several features that makes it a good choice for HLD of instruments
and medical devices. It is relatively fast-acting, it is non-irritating to the eyes and nasal mucosa, and
it does not require activation. It kills all vegetative bacteria, fungi, and non-enveloped and enveloped
viruses. It does not kill all bacterial spores; therefore, it cannot be used to achieve sterilization. It is
compatible with most metals and plastics, and can be used to process most endoscopes. However,
there are reports of serious anaphylactic reaction in bladder cancer patients; therefore, OPA should
not be used to process scopes for use in patients with bladder cancer.
Once the OPA solution is poured into the disinfection container, it can be used for 14 days as long
as the solution concentration meets the minimum effective concentration. The concentration must be
tested using the approved test strips provided by the manufacturer before the first use and then
regularly to assure that the minimum concentration is met. The manufacturer recommends testing the

solution before each use, and it should be done daily, at a minimum. A log should be kept
documenting the quality control results. OPA must be used within 24 months of the date of
manufacture. Unopened bottles should be stored in a cool, dry place. Once the bottle of OPA is
opened, it must be discarded within 75 days or by the bottle expiration date, whichever date comes
first. HCWs handling OPA must wear PPE, including gloves and face and eye protection. OPA stains
unprotected skin gray.
Items should be thoroughly cleaned and dried before OPA disinfection. The contact time for HLD
using OPA is 12 minutes at 20 °C (68 °F). Ensure that all surfaces and lumens contact the disinfectant
for the entire soaking time. This means lumens must be filled with disinfectant and free of air bubbles.
After disinfection time, items are removed from the disinfection solution and rinsed. OPA requires
three complete rinses in water for one minute each. Items that may come in contact with non-intact
skin and mucous membranes may be rinsed with clean, potable water. If the water quality is not
reliable, a final rinse with 70% isopropyl alcohol will help eliminate any microbes and speed the
drying process. When used for HLD of endoscopes, all lumens and channels should be rinsed with
70% alcohol after the third water rinse to help dry the channels. If items are not rinsed properly, the
residual OPA can causes staining of patient’s and HCW’s skin.
OPA can be safely disposed of in a sewerage system. No deactivation is required before disposal
down the drain, although it should be accompanied with large amounts of water.
OPA is not approved for sterilization. If sterilization methods are not available and OPA is used to
high-level disinfect items that will be used on sterile tissue, the three rinses should be done with
sterile water.
Iodine and Iodophor Solutions
Iodine solutions (1% to 3% aqueous or tincture) and Iodophor (iodine complexes with an organic
material) have been used primarily as antiseptics.
Note:
For many years, Iodophors manufactured for use as antiseptics proved to be ineffective for disinfecting
inorganic objects and surfaces. Usually, antiseptics have significantly less iodine (Rutala 1996). Whatever
the case may be, it is good to make sure that labels are checked.
Iodophors are not HLDs because conclusive evidence is lacking on their effectiveness against
bacterial endospores and some fungi. For example, Pseudomonas species, a group of gram-negative
bacteria, have been known to multiply in Iodophors (Favero 1985; Rutala 1993). These solutions
are generally nontoxic and nonirritating to the skin and mucous membranes. Iodophors must be
properly diluted to be effective. Interestingly enough, correctly diluted Iodophors have more active
killing power than the full strength Iodophors due to the decreased availability of “free” iodine in
the latter.
Advantages
• They do not cause deterioration or softening of plastic items if they are kept dry between
soakings.

• Diluted solutions of iodine and Iodophors are nontoxic and nonirritating (unless there is
a known allergy to it).
• Can be used for disinfection of blood culture bottles and medical equipment, such
as thermometers.
Limitations
• It is an oxidizing agent (causes rust) and should be used only for high-quality stainless-
steel equipment or plastic materials.
• Like alcohol and chlorine, iodine and Iodophors are inactivated by organic materials;
therefore, only previously cleaned instruments should be placed in iodine or Iodophor
solutions.
Note: To effectively avoid inactivation, medical articles/equipment should first be thoroughly rinsed with
sterile water or boiled and filtered (if necessary) water at least three times after soaking.
Allergic reactions can also occur to the staff handling iodine solutions and Iodophors. Therefore,
they are:
• Primarily used as antiseptic for skin and mucous membranes (aqueous preparations only).
• Used for decontamination when the commercial preparation with aqueous solutions is
available but must be made fresh on daily basis.
Hydrogen Peroxide
Hydrogen peroxide (H2O2) is often available locally, is relatively cheaper than any other chemical
disinfectant, and can be used to achieve HLD and sterilization. It has activity against a wide range of
microorganisms, including vegetative bacteria, fungi, and viruses. Hydrogen peroxide (3% solution)
works effectively at lower pH and is stable at room temperature. Hydrogen peroxide does not damage
glass and plastic articles and is safe on ventilators. It does have compatibility concerns with selected
metals, therefore, approval from the device manufacturer should be obtained before use of this
method on items where corrosion would be a concern. It has a low toxicity and irritancy rating. No
activation is required.
A 3% solution can achieve HLD using a contact time of 30 minutes at 20 °C (68 °F). To achieve
sterilization, a higher concentration (7.5% solution) and a longer contact time are required (6 hours
at 20 °C [68 °F]).
Follow the manufacturer’s instructions for product-specific contact time. After the first use, hydrogen
peroxide can be used for a maximum of 21 days. The concentration of hydrogen peroxide must be
monitored regularly by testing the minimum effective concentration. Items processed using hydrogen
peroxide should be thoroughly rinsed with plenty of water. Chemical irritation has been identified in
an endoscopy unit where endoscopes were disinfected with hydrogen peroxide.
The major limitation of this compound is that it is highly corrosive and should not be used to disinfect
copper, aluminum, zinc, or brass. It loses its potency rapidly when exposed to heat and light; it should

be stored in a cool and dark place. WHO does not recommend using H2O2 in hot (tropical) climates
where there are inadequate facilities to keep the product cool because of its instability in the
presence of heat and light (WHO 1989).
Other Chemical Sterilants
Paracetic acid (peroxyacetic acid) is rapidly acting and effective against all microorganisms. Unlike
other similar compounds, its activity will not be impeded by organic matters on items to be sterilized
and it decomposes into safe products. When diluted, it is very unstable and must be used with a
specially designed automatic sterilizer (APIC 2002). It is usually used for sterilizing different types
of endoscopes and other heat-sensitive instruments.
Para formaldehyde: this solid polymer of formaldehyde may be vaporized by dry heat in an enclosed
area to sterilize objects (Taylor et al. 1969). This technique, called “self- sterilization” (Tulis 1973),
may be suitable for sterilizing endoscopes and other heat-sensitive instruments.
Gas plasma sterilization (hydrogen peroxide based): this method can sterilize items in less than one
hour and has no harmful byproducts. However, it does not penetrate well and cannot be used on paper
or linen. A specialized sterilizer is required for performing gas plasma sterilization (Taurasi 1997).
Disposal of Used Chemical Containers
• Glass containers may be washed with soap, rinsed, dried, and reused. Alternatively,
thoroughly rinse them (at least two times) with water and dispose of by burying.
• Plastic containers used for toxic substances, such as glutaraldehydes or formaldehyde,
should be rinsed (at least three times) with water and disposed of by burning.
Disposal of Used Chemicals
Waste should be carefully poured down a utility sink drain or a flushable toilet and then rinsed or
flushed with water. Liquid wastes can also be poured into a latrine. However, this activity should be
done without losing sight of precaution to avoid splashing. Rinse the toilet or sink carefully and
thoroughly with water to remove residual wastes.
Products Not to Be Used as Disinfectants
Many antiseptic solutions are incorrectly used as disinfectants. Although antiseptics (sometimes
called “skin disinfectants’’) are adequate for cleansing skin before surgical procedures, they are not
appropriate for disinfecting surgical instruments and gloves. These antiseptics do not reliably destroy
bacteria, virus, or endospores. For example, Savlon (chlorhexidine gluconate with or without
cetrimide), which is readily available worldwide, is often mistakenly used as a disinfectant.
Antiseptics that Should Not Be Used as Disinfectants
• Acridine derivatives (e.g., gentian or crystal violet)
• Cetrimide (e.g., Cetavlon®)

• Chlorhexidine gluconate and cetrimide in various concentrations (e.g., Savlon)
• Chlorhexidine gluconate (e.g., Hibiscrub®, Hibitane®)
• Chlorinated lime and boric acid (e.g., Eusol®)
• Chloroxylenol in alcohol (e.g., Dettol®)
• Hexachlorophene (e.g., PhisoHex®)
• Mercury compounds
Mercury solutions (such as mercury laurel) can cause birth defects and are too toxic to use as either
disinfectants or antiseptics, although they are known to possess functions of low-level disinfectants
(Block 1991). Other products frequently used to disinfect equipment are 1% to 2% phenol (e.g.,
Phenol®), 5% carbolic acid (Lysol®) and benzalkonium chloride, and quaternary ammonium
compound (Zephiran®). These are low-level disinfectants and should only be used to decontaminate
environmental surfaces (e.g., floors or walls).
Storage of Disinfectants
• Chemical disinfectants should be stored in a cool and dark area.
• Never store chemicals in direct sunlight or in excessive heat (e.g., upper shelves in a
tin-roofed building).
Cleaning
Cleaning is a critical step in instrument processing because:
• It makes instruments safer for additional processing, which reduces the risk of infection
for the HCWs who handle the instruments.
• It reduces damage to the instruments. At the end of a clinical or surgical procedure,
surgical instruments and equipment are contaminated with tissue particles, body fluids,
and blood. Long contact with blood is corrosive and can damage surgical instruments.
• It makes the instruments easier to process. Once blood dries on an instrument, it is
difficult to clean, especially if the blood has entered the hinges and sockets.
• Bioburden and residual cleaning agents remaining on an item can inactivate chemical
disinfectants or sterilants, and protect microorganisms from destruction, which can result
in disinfection and sterilization failures (Zuhlsdorf, et al. 2004). In addition, instruments
and materials used during an operation will be covered with blood and tissue remains.
They may have been in touch also with chemicals and fluids, dirt, and dust. Hinged
instruments may have remnants of blood and tissue from the operation. The tubing of
hollow instruments may be also full of these soiled materials.
Therefore, it is important to follow all the necessary steps to properly clean instruments before HLD
or sterilization. Before transport to the instrument processing area, HCWs should perform point-of-

use cleaning—wiping instruments to remove tissue and blood immediately at the conclusion of the
procedure.
Once instruments are in the instrument processing area, cleaning involves thorough cleaning of
instruments with water and a detergent and/or an enzymatic cleaner followed by thorough rinsing,
and then drying before further processing.
Cleaning is a process of physically removing infectious agents and other organic matters on which
they live and thrive but does not necessarily destroy infectious agents. It is an essential prerequisite
to ensure effective disinfection or sterilization by reducing the number of microorganisms, especially
endospores causing tetanus usually found on soiled instruments and equipment. Neither sterilization
nor HLD can be effective without prior cleaning (Porter 1987).
Cleaning using hand soap (bar) or powdered laundry detergent is not advisable because the fatty acids
in them react with the minerals in hard water leaving a residue or scum (insoluble calcium salt) that
is difficult to remove. Using liquid soap, however, is better in that it mixes more easily with water
than bar or powdered soaps. It can also break fats and grease very easily, making the cleaning process
easier and more effective. The water used for cleaning purposes should be tap water that is not
contaminated. If this is not possible, one may optionally use water boiled for 10 minutes and filtered
to remove particulate matter (if necessary), or chlorinated water, water treated with a diluted bleach
solution (sodium hypochlorite) to make the final concentration 0.001%.
It is not advisable to use abrasive cleaners (e.g., Vim® or Comet®) or steel wool because these
products can scratch or pit metal or stainless steel. These scratches then become a good hiding place
for microorganisms and make cleaning more difficult, hence increasing the chance of rusting.
Note:Many cleaning products contain ammonia, which can interact with bleach and cause the formation of
toxic fumes. Check the label of any cleaning product to see if it contains ammonia. (Sometimes you can be
alerted about it if you encounter the pungent smell of ammonia when opening the container.)
• Cleaning is the first step in reprocessing a device after use.
• Failure to properly clean an instrument may allow foreign material (e.g., soil and organic
materials, including microorganisms) located outside and inside the device to hinder
disinfection and/or sterilization.
• Cleaning is accomplished by using a manual process with cleaning chemicals (detergent)
and water, brushing or flushing, or by using ultrasonic and or washer disinfectors to
remove foreign material. Not every facility has a high level of resources, but medical
devices must be thoroughly cleaned before disinfection or sterilization, irrespective of
available resources.
One can clean without sterilizing, but one cannot sterilize without cleaning!

Table 7.2. Effectiveness of methods for processing instruments
Method Effectiveness
(kill or remove microorganisms)
End point
Cleaning (soap and
rinsing with water)
Up to 80% Until visibly clean
High-level
disinfection
95% (does not inactivate
endospores)
Boiling or chemical for 20 minutes
Sterilization 100% High-pressure steam, dry heat, or
chemical for the recommended time
Source: Tietjen et al. 2003
As shown in table 7.2, most microorganisms (up to 80%) in blood and other organic material are
removed during the cleaning process. Moreover, a study showed that following the standard cleaning,
most non lumen surgical instruments were found to contain less than 100 colony-forming units
consisting of relatively non-pathogenic microorganisms (Rutala, Cole, Thomann, et al. 1998). This
study confirmed that thorough cleaning is more effective than was previously assumed, and
documented the importance of cleaning in producing the desired safe outcome of surgery.
Once an item is washed, it also needs to be rinsed and dried. Thorough rinsing with clean water
removes any soap residue that can interfere with sterilization or HLD. After rinsing, items should be
dried, especially if they will be sterilized or high-level disinfected using chemical disinfectants.
It should be noted that water possibly remaining on the surgical articles/equipment (e.g., surgical
instruments), if not dried well, dilutes the solution and may hamper the process.
Manual Cleaning Steps
Facilities with minimal resources can adequately clean and prepare devices for sterilization with an
effective manual cleaning process. However, it is vital that all devices be disassembled so that all
surfaces can be cleaned and disinfected, irrespective of the cleaning method chosen.
• Ensure that the device to be cleaned is compatible with the chemical solution used in the
facility.
• Completely submerge immersible items during the cleaning process to minimize
aerosolization and to assist in cleaning.
• Remove gross soil using tools, such as brushes and cloths.
• Clean devices that have lumens with an appropriate brush, then manually or mechanically
flush with a detergent solution and rinse with potable water.
• Check devices with lumens for obstructions and leakage.
1. Put on PPE, including a water-resistant gown, gloves, face mask, and head cover. If gloves
are torn or damaged, they should be discarded; otherwise, they should be cleaned and left to
dry for reuse the following day. Even when wearing heavy-duty utility gloves, care should be
taken to prevent needle sticks or cuts when washing sharps.

2. Fill sink or appropriate basin with sufficient warm water for complete immersion of the
devices being cleaned.
3. Add the appropriate quantity of detergent following the manufacturer’s instructions for
dosage.
4. Clean the device under the surface of the water so that aerosols are not produced.
5. Use appropriate brushes to properly clean box locks, lumens, and other hard-to-clean areas.
• Use soft (nylon) bristle brushes so that the surface of the instrument is not damaged.
• Brushes used to clean lumens must be the same diameter as the instrument to ensure that
all internal surfaces can be reached.
• Brushes must also be long enough to exit the distal end of the instrument.
NOTE: Brushes should be thermally or chemically disinfected at the end of the day. If this is not
possible, they should be cleaned and left to dry. Brushes should be replaced when damaged.
6. In another sink or basin, completely immerse the device in clean purified water and rinse the
device thoroughly.
7. Air-dry or hand-dry using a disposable clean, non-linting cloth.
Note:
Instruments that will be further processed with chemical solutions must dry completely to avoid diluting the
chemicals; however, items to be treated with HLD by boiling or steaming do not need to be dried first.
Items that cannot be cleaned thoroughly should not be reused but should be discarded after
use.
Summary of Cleaning
• Surgical instruments should be disassembled to allow for effective cleaning.
• Physical cleaning reduces the bioburden or the microbial load sufficiently to allow the
process of sterilization or HLD to be effective.
• Dirt protects microorganisms from contact with the disinfectants, steam, and other
chemicals, thereby rendering the process ineffective.
• Some chemicals used for reprocessing devices are inactivated in the presence of organic
matter.
• Some chemicals used for reprocessing are inactivated when mixed with other chemicals
(incompatible).
• The life of the instruments is prolonged if soil and debris are removed regularly.

Cleaning Products
There is no single cleaning agent that removes all types of bioburden. Bioburden is made up of a
variety of matter, which may be soluble or insoluble in water and can be organic or inorganic.
Properties Associated with Ideal Cleaning Agents
• Emulsification
• Surfactation
• Dispersion and suspension
• Water softening
• Free rinsing
• Non-toxic
• Have a neutral PH
• Have a long life
• Be cost effective
Selection of Cleaning Agents
Deposits of dust, soil, and microbial residue on equipment can contribute to HAIs. Cleaning agents
remove organic, inorganic, and microbial contaminants. No single compound has all the properties
that are required to remove all soil deposits. The first step in cleaning is the use of surfactants or
surface-active agents to reduce tension, which assists in soil being held in the cleaning solution.
Enzymatic (proteolytic) cleaners
Gross soil should first be removed by rinsing with detergent and water. If blood has dried or hardened,
soaking in a warm solution of an enzymatic cleaner is required. Cleaning agents containing enzymes
to break down proteinaceous matter may be used for sensitive equipment if the equipment
manufacturer approves their use.
Remember: Enzymatic cleaners are not disinfectants; they only remove protein from surfaces. Rubber or
nitrile gloves are recommended when handling enzymatic solutions. Enzymatic cleaners will degrade latex
gloves.
Summary of Recommendations
• Disposable sharps shall be disposed of in an appropriate, puncture-resistant, sharps
container at the point of use prior to transportation.
• Soiled medical devices shall be handled in a manner that reduces the risk of exposure
and/or injury to staff/visitors/patients/residents or contamination of environmental
surfaces.

• Contaminated devices shall not be transported through areas designated for the storage of
clean or sterile supplies, visit/patient/resident care areas, or high-traffic areas.
• Sterile and soiled devices should not be transported together.
• Reusable medical devices must be thoroughly cleaned before disinfection or sterilization.
• If cleaning cannot be done immediately, the medical device should be pretreated to
prevent organic matter from drying on it.
• The process for cleaning (decontamination) should include written protocols for
disassembly, sorting, pretreatment, physical removal of organic material, rinsing, and
drying.
• It is strongly recommended that catheters, tubing, and other medical devices with small
lumens that are very difficult to clean be designated as single-use material and not be
reprocessed and reused.
Preparation and Packaging for Reprocessing
The inspection, assembly, and packaging of reusable surgical instruments and medical devices are a
crucial part of the reprocessing cycle.
All instruments and other items should be thoroughly cleaned and dried before being disinfected or
prepared for sterilization. In some cases, it is not necessary to completely dry the items (needles or
the like that have small openings) being sterilized for the small amount of water left inside these
openings help in the steam sterilization process. For such items, flushing them with distilled or boiled
water just before packaging for steam sterilization should be done after cleaning. Finally, all
jointed instruments should be open (or be unlocked) and disassembled. Reusable cloth items
should be laundered and dried after use or before sterilization to:
• Remove organic matter.
• Prolong the life of the cloth by restoring the fabric’s normal moisture (water) content.
Inspection and Function Testing (Post-Cleaning)
• Each set should be inspected separately.
• Box joints, serrations, and crevices should be critically inspected for cleanliness.
• Hinges on devices, such as artery forceps and clamps, should be checked for ease of
movement.
• Jaws and teeth should be checked for alignment.
• Ratchets should be checked for security.
• Multi-part instruments should be assembled to ensure that all parts are complete and
working.

• Multi-part instruments should be assembled or disassembled for sterilization per the
manufacturer’s instructions.
• Any damaged, incomplete, or malfunctioning devices should be reported immediately to
the supervisor.
• Cutting edges on devices, such as scissors, rongeurs, chisels, and curettes, should be
checked for sharpness.
• Hinges on devices, such as artery forceps and clamps, should be checked for ease of
movement.
• Each device should be checked after each cleaning cycle to ensure that all screws on
jointed devices are tight and have not become loose during the cleaning process.
Placing Items in Surgical Trays or Sets
Devices should be prepared for sterilization in the following way:
• Clean and dry
• Jointed instruments in the open or unlocked position
• Multi-part or sliding pieces disassembled, unless otherwise indicated by the device
manufacturer
• Devices with concave surfaces that will retain water must be placed in such a manner that
condensate does not collect
• Heavy items arranged so as to not damage lighter more delicate items
• Sharp instruments with tips protected without being too tight
Assembly
The purpose of assembly and checking is to ensure that:
• All devices are present in accordance with the surgical tray list.
• All devices are assembled correctly in accordance with the manufacturer’s instructions.
• All devices are placed in the correct tray in a manner that ensures ease of use by the user.
The area where assembly and checking takes place should be a designated and controlled area to
optimize the effect of the sterilization process and minimize the contamination of the sets.
Packing and Wrapping for Steam Sterilization
Wrapping items to be sterilized permits sterile items to be handled and stored without being
contaminated. (Figure 7.2 shows the typical wrapping techniques.) Materials used for wrappers
should:
• Allow air removal and steam penetration.

• Act as a barrier to microorganisms and fluids.
• Capable of withstanding high temperatures.
• Resist tears and punctures and be free of holes.
• Be nontoxic and low-lint.
• Not be costly.
Types of materials that can be used as wrappers include:
• Muslin cloth (140 thread count): Use two double thickness wraps (four layers in all)
because this is the least effective of all materials used for wrapping. Use for both steam
and dry heat sterilization.
• Paper: Double wrapping (two layers) is recommended. Use it for steam sterilization only
and avoid reuse.
Tips for Wrapping
• At least two layers of wrapping should always be used to reduce the possibility of
contaminating the contents during unwrapping.
• Do not wrap packages too tightly. If they are wrapped too tightly, air can become trapped
at the center of the packages preventing the temperature from getting high enough to kill
all microorganisms. Wrapping with strings or rubber bands or tying linen too tightly can
also prevent steam from reaching all surfaces.
• The outer wrapper of the pack can be loosely secured using linen ties. Packs can be
secured with linen ties made from the same cloth. Hemmed strips of about one-half inch
wide and of varied lengths. One or two of such strips can be used for each package.
Because they can fit to almost any size of package, they eliminate the need for an
expensive and hard-to-remove indicator tape.
• Do not wrap items in any waterproof material, such as plastic or canvas for steam
sterilization because the steam cannot penetrate the material and leaves the item
unsterilized.
• Wrappers should not be reused if they are torn, stained with oils, or have hard or gummy
deposits.

Figure 7.2. Typical wrapping techniques
Packing and Wrapping for Dry Heat Sterilization
Packaging materials for dry heat sterilization should allow easy heat penetration, provide an adequate
barrier to microorganisms after sterilization, resist tearing or puncturing before and after sterilization,
have proven seal integrity, allow for ease of aseptic presentation, be free of toxic ingredients, be low-
linting or lint-free, and be cost-effective and readily available. The material should have been
approved for use with dry heat sterilization.

Packaging Materials for Dry Heat Sterilizer
• Medical-grade paper, bleached crepe paper, cellulose, and synthetic fibers
• Aluminum foil (thicker than domestic use foil)
• Glass bottles, vials, and ampoules for liquids
• Non-perforated glass or metal containers
• Transparent peel pouches approved by the manufacturer for use in dry heat sterilizers
High-Level Disinfection
Sterilization is the safest and most effective method for the reprocessing of surgical instruments
because it kills all vegetative microorganisms and microbial spores. However, sterilization is not
always suitable because some materials cannot withstand the high temperatures used during the
sterilization process and sterilization may not be consistently available in some low-resource settings.
There are three levels of disinfection: low-level, intermediate-level, and high-level. The level of
disinfection needed is based on how the item will be used. Per the Spaulding classification, devices
that come in contact with intact skin are classified as non-critical items and should be processed by
intermediate- or low-level disinfection. Surgical instruments and medical devices that come in
contact with non-intact skin or mucous membranes (classified as semi-critical devices) must, at a
minimum, be high-level disinfected, although sterilization is always preferable, when possible.
High-level disinfection can be achieved by:
• Pasteurization/ boiling in water
• Steaming
• Soaking instruments in chemical disinfectants (chemical disinfection)
To be effective, all steps in performing each method must be monitored carefully.
The highest temperature that boiling water or low-pressure steam will reach is 100 °C (212 °F) at sea
level. Because the boiling point of water is 1.1 °C lower for each 1,000 feet in altitude, it is best to
boil or steam items to be high-level disinfected for a minimum of 20 minutes. This provides a margin
of safety for variations in altitudes up to 5,500 meters (18,000 ft) and at the same time eliminates the
risk of infection from some, but not all endospores.
Boiling Versus Steaming
In both boiling and steaming, moist heat is used to kill microorganisms. Steaming has several distinct
advantages over boiling for the final processing of surgical gloves and other items, such as plastic
cannula and syringes. It is less destructive but more cost-effective because it uses much less fuel than
boiling. For example, only about one liter of water is needed to steam gloves or instruments, whereas
four to five liters are required for boiling. Besides, it is free from discoloration of instruments
resulting from calcium or other heavy metals contained in some tap water because the steam contains
only pure water molecules. Last, although boiling and steaming gloves are equally easy to do, drying

boiled gloves is not practical because it is difficult to prevent contamination while they are being
dried in the open air. If steaming is instead opted for, they remain in the closed steamer pan, which
results in little or no contamination of the gloves.
The major limitation of steaming is that if the steamers available locally are small, they can
practically be used only for a small number of items (e.g., one set of instruments or 15 to 20 pairs of
surgical gloves) per tray or pan. For steaming to be effective, the bottom pan must contain enough
water to continue boiling throughout the steaming process. By contrast, large boiling pots are
easier to use for metal instruments and do not need to be monitored the entire time to be sure that the
process is being done correctly.
Both boiling and steaming share some advantages and limitations over chemical HLD, which is the
only other method of HLD.
Advantages
• Inexpensive procedures
• Easily taught to HCWs
• Requires no special chemicals or dilutions and leaves no chemical residue
• Heat sources (boilers or rice cookers) are commonly available
Limitations
• Length of processing time must be carefully measured (i.e., start timing only after
the steam begins to escape or water has reached a rolling boil). Once timing starts, no
additional items or water can be added.
• Objects cannot be packaged before HLD; therefore, there is a greater chance of
contamination if the items are to be stored.
• Requires a fuel source that may be unreliable.
High-Level Disinfection by Boiling
Pasteurization can be used to achieve HLD of instruments and medical devices. It is carried out by
heating at 77 °C (170.6 °F) for 30 minutes or boiling at 100 °C (212 °F) for 20 minutes.
Boiling has been a common practice for HLD of instruments and equipment used for semi-critical
and sometimes critical procedures because it was the only available option in some low-income
countries.
Pasteurization/boiling in water is an effective and practical way to high-level disinfect instruments
and other items. Although boiling instruments in water for 20 minutes will kill all vegetative forms
of bacteria, viruses (including HBV, HCV, and HIV), yeasts and fungi, it will not kill all endospores
reliably.

Instructions for HLD by Boiling
STEP 1 Clean all instruments along with other items to be high-level disinfected.
STEP 2 If possible, completely immerse items in the water. Adjust the water level so that there
is at least 2.5 cm (1 inch) of water above the instruments. Moreover, make sure that all
bowls and containers to be boiled are full of water. For example, one needs to empty
bowls that turned bottom side up and float on the surface containing air pockets.
Note:
A study documented that the interior temperature of a plastic cannula floating on the surface of
boiling water reaches a temperature of 96 °C to 98 °C in less than a minute. Therefore, for items
that float (e.g., syringes, plastic manual vacuum aspiration [MVA] cannula, or rubber items), it
is not necessary that they be fully covered by the water to achieve HLD if the pot is
covered with a lid Greenslade et al. 1993).
STEP 3 Close the lid over the pan and bring the water to a gentle rolling boil. Boiling too
vigorously wastes fuel, rapidly evaporates the water, and may damage delicate (or sharp)
instruments or other items. A gentle rolling boil is sufficient and will prevent instruments
or other items from being bounced around and possibly damaged by striking other
instruments or the side walls of the pot.
STEP 4 Start timer. In the HLD log, note the time on the clock and record the time when the rolling
boil begins.
STEP 5 Boil all items for the required time: 30 minutes at 77 °C (170.6 °F) or 20 minutes at 100
°C (212 °F).
Tips on Boiling
• Always boil for the required time period in a container with a lid.
• Start timing when the water begins to boil.
• Metal instruments should be completely covered with water during boiling.
• Do not add anything to the pot after timing begins.
STEP 6 Remove all items after the recommended time with a high-level disinfected forceps.
Never leave boiled instruments in the water that has stopped boiling. As the water cools
and the steam condenses, air and dust particles are drawn down into the container and
may contaminate the instruments (Perkins 1983).
STEP 7 Use instruments and other items immediately, or pick them up with high-level disinfected
forceps or gloves and place the objects in a high-level disinfected container with a
tight-fitting cover. If any pooled water remains in the bottom of the container, remove the
already dried items, and place them in another high-level disinfected container that is dry
and can be tightly covered.

Protecting the Life of Instruments that Are Frequently Boiled
Lime deposits may form on metal instruments that are frequently boiled. This scale formation caused
by lime salts in the water is difficult to avoid. However, following the steps below can minimize the
problem of lime deposits. The steps are:
STEP 1 Boil the water for 10 minutes at the beginning of each day before use. (This precipitates
much of the lime salt in the water on to the walls of the boiling pot before objects are
added.)
STEP 2 Use the same water throughout the day, adding enough water only to keep the surface at
least one inch above the instruments to be high-level disinfected. (Frequently draining
and replacing the water, and boiling too vigorously increase the risk of lime deposits on
instruments.)
STEP 3 Drain and clean the boiler or pot at the end of each day to remove lime deposits.
High-Level Disinfection by Steaming
Steaming surgical gloves has been used as the final step in processing gloves for many years in
Indonesia and other parts of Southeast Asia. A study conducted on the practice confirmed the
effectiveness of this process of making gloves ready for reuse (McIntosh, et al. 1994).
The steamer used in the study (figure 7.3) consists of:
• A bottom pan (approximately 31cm in diameter) for boiling water
• One, two, or three circular pans with multiple 0.5cm (diameter) holes in their bottoms
to permit the passage of steam through them and water back down to the bottom pan
• A lid that fits on the top pan
HLD by steaming is an option for plastic items used for patient care.
Figure 7.3. Steamer used for HLD

Two types of tests were conducted to determine whether surgical gloves and other items could be
high-level disinfected using this process. In the first set of experiments, a thermocouple was placed
inside a glove in each of the three pans and the rate and extent of the temperature change was
recorded. When 5 to 15 pairs of surgical gloves were placed in each of the three pans, the
temperature reached 96 °C to 98 °C in less than four minutes in the bottom and middle pans, and
within six minutes in the upper pan. Thereafter, the temperature remained constant throughout the
remaining 20 minutes. In the second set of experiments, batches of new surgical gloves were
contaminated with Staphylococcus epidermidis, Staphylococcus aureus, Pseudomonas aeruginosa,
Candida albicans, and Bacillus subtilis (heat-sensitive) and Bacillus stearothermophilus (heat-
resistant) endospores. Next, the gloves were placed in each of the three pans and steamed for 20
minutes. After this, the gloves were removed from the pans and incubated for 24 hours in sterile
media and then were placed on blood agar. In all cases (6, 15, and 30 gloves per pan), there was no
growth of any microorganisms or B. subtilis endospores within 24 hours. As was expected, only
a reduction in the number of B. stearothermophilus (heat-resistant) endospores occurred, nothing
more than that.
Materials Needed for HLD by Steaming
• Steamer pan without holes to hold water (such as momo steamer)
• Two to three additional pans with holes to allow steam to move to the upper pan. The
pans should be deep enough to fit the largest item being steamed.
• A tight-fitting lid to cover the upper pan
• An additional bottom pan for drying the processed items
Instructions for HLD by Steaming
After instruments and other items have been thoroughly cleaned, they are ready for HLD by steaming.
STEP 1 Perform hand hygiene.
STEP 2 Fill the bottom pan of the steamer with approximately one liter of clean water, about half
the volume of the pan.
STEP 3 Place instruments, plastic MVA cannula, and other items in one of the steamer pans with
holes in its bottom (figure 7.3). To make removal from the pan easier, do not overfill the
pan.
Repeat this process until the three steamer pans have been filled. Stack the filled steamer
pans on top of a bottom pan containing water for boiling. A second empty pan without
holes should be placed on the counter next to the heat source (Step 7).
STEP 4 Place a lid on the top pan and bring the water to a full rolling boil.
It should be noted that when water only simmers, very little steam is formed and the
temperature may not get high enough to kill microorganisms.

STEP 5 When steam begins to come out between the pans and the lid, start the timer or note the
time on a clock and record the time in the HLD log.
STEP 6 Steam items for 20 minutes.
STEP 7 Remove the top steamer pan and put the lid on the pan that was below it (the pan now
on top). Gently shake excess water from the pan just removed.
STEP 8 Put the pan just removed onto the empty pan (Step 3). Repeat until all pans are restacked
on this empty pan and cover the top pan with the lid. This step allows the items to cool
and dry without becoming contaminated.
STEP 9 Allow items to dry in the air while in the steamer pans (1 to 2 hours) before using.
STEP 10 Using high-level disinfected forceps, transfer the dry items to dry, high-level disinfected
containers with a tight-fitting cover. Instruments and other items can also be stored in
the stacked and covered steamer pans as long as a bottom pan (with no holes) is used.
High-Level Disinfection Using Chemicals
Although several disinfectants are commercially available in most countries, four disinfectants —
OPA, glutaraldehydes, formaldehyde, and peroxide—are routinely used as high-level disinfectants.
(Table 7.3 provides guidelines for preparing and using these disinfectants.) These chemicals can
achieve HLD if the items being disinfected are thoroughly cleaned before immersion. A HLD should
be selected for use based on the characteristics of the items to be disinfected, the physical area (i.e.,
whether it is well ventilated), and the skills of personnel available to do the procedure.
Key Steps in Chemical High-Level Disinfection
• Thoroughly clean instruments and other items that may have been contaminated with
blood and body fluids, and thoroughly clean and dry them before placing them in the
disinfectant solution.
• Completely immerse all items in the HLD.
• Soak them for 20 minutes.
• Remove items using high-level disinfected or sterile forceps or gloves.
• Rinse well with boiled and filtered (if necessary) water three times and air dry.
• Use promptly or store in a dry, high-level disinfected and covered container.
Adapted from: Tietjen and McIntosh 1989
How to Prepare an HLD Container
• For small containers, boil water in the covered container for 20 minutes, then pour out the
water, which can be used for other purposes. Replace the cover and allow the container to
dry.

• For large containers, fill a plastic container with 0.5% chlorine solution and immerse the
cover in chlorine solution as well. Then soak them for 20 minutes. Thereafter, rinse the
cover and the inside of the container three times with boiled water and allow them to dry
in the air. Note that large metal containers cannot be high-level disinfected using
chemicals.
Factors That Affect the Disinfection Process
• Quantity and location of the microorganisms: As the quantity of microorganisms
increases, longer exposure times and higher concentrations of chemical disinfectants are
needed to effectively disinfect instruments and devices. Therefore, it is essential that
HCWs thoroughly clean items before disinfection.
• Quantity and location of organic matter: The presence of organic matter, such as tissue
particles, blood, and other body fluids, can inactivate some disinfectants and compromise
their effectiveness. In addition, biofilm formation makes it more difficult to adequately
clean items. Thorough cleaning of instruments and devices is essential to reduce organic
materials and biofilms before the disinfection process (Acosta-Gnass, Stempliuk 2009).
• Concentration of the disinfectant: The concentration of the disinfectant should be such
that it effectively kills microorganisms and, at the same time, does not harm the
instruments and devices being disinfected.
• Physical and chemical factors: Some disinfectants require a specific temperature or pH
level to be effective. Always follow the manufacturer’s instructions for use.
• Duration of exposure: Each disinfection method and disinfectant is associated with a
specific amount of time that is necessary for achieving the desired results.
• Resistance of microorganism to the chemical agent: Resistance of microorganisms to
various disinfectants can occur. Therefore, it is important to periodically review for
documented or potential resistance of microorganisms to the disinfectant being used.
Sterilization
Sterilization is a process in which the destruction of all microorganisms, including bacterial
endospores, takes place. This can be achieved by either physical or chemical methods and is
especially necessary for medical devices penetrating sterile body sites or having direct contact with
the blood (Spaulding 1939).
The proper sterilization of medical devices, surgical instruments, supplies, and equipment used in
direct patient care and/or surgery is very critical in the modern healthcare delivery system and has
great impact on patients’ safety. Sterilization in health facilities can be achieved by high-pressure
steam (autoclaves), dry heat (oven), chemical sterilants (glutaraldehyde or formaldehyde solutions),
or physical agents (radiation).
Note: Rinsing an item with alcohol and then igniting it with a match (flaming) is not an effective method of
disinfection or sterilization.

Essentials of Sterilization Process:
1. The sterilants and sterilizing equipment must be validated and appropriate in design and
operation to correctly integrate key yardsticks like: time, temperature, contact, pressure (for
steam sterilization), and the right sterilants (for chemical sterilization) to be as effective as
they should be.
2. Instruments must be thoroughly cleaned to reduce dirt to guarantee effectiveness of the
sterilization process. The more dirt, the greater the challenge to the sterilization process.
Therefore, it could be said that the effective sterilization is entwined with an effective
removal of dirt before making the instrument ready for sterilization.
3. There must be close and adequate contact between the chemical sterilant and all surfaces
and crevices of the device to be sterilized.
The Effectiveness of Any Sterilization Method is Also Dependent on Four Other Factors
1. The type of microorganism present
2. The number of microorganisms present
3. The amount and type of organic material that protects the microorganisms. Blood or
tissue remaining on poorly cleaned instruments acts as a shield to microorganisms during the
sterilization process.
4. The number of cracks and scratches on an instrument that might harbor microorganisms.
Important Reminder: Sterilization is a process, not a single event; therefore, all phases and steps in
the process must be carried out correctly.
Method of Sterilization
• High-pressure steam sterilization (autoclaves)
• Dry heat sterilization (oven)
• Chemical sterilization
• Other methods
Standard Conditions for Steam Sterilization
Steam sterilization (Gravity): In the usual practice, the temperature in the steaming process should
be 121 °C (250 °F) and its pressure, 106 kPa (15 lbs/in2
), the time being 20 minutes for unwrapped
items and 30 minutes for wrapped items. As an alternative, it could be set at a higher temperature of
132 °C (270 °F) with the pressure of 30lbs/in2
, and the duration being 15 minutes for wrapped items.
Whatever the case may be, one should allow all items to dry before removing them from the sterilizer.
Note: Pressure settings (kPa or lbs/in2
) may vary slightly depending on the sterilizer used.
When possible, follow the manufacturer’s recommendations.

Remember:
• Exposure time begins only after the sterilizer has reached the target temperature.
• Do not overload the sterilizer (leave at least 7.5 cm [3 inches] between the items and walls of
sterilizer). Overloading alters heat convection and increases the time required to sterilize.
Source: Perkins 1983
High-Pressure Steam Sterilization (Autoclaves)
Steam sterilization is generally considered the method of choice for sterilizing instruments and other
items used in healthcare facilities. In settings where electricity is a problem, instruments can be
sterilized in a non-electric steam sterilizer using kerosene or another fuel as a heat source.
Rationale of Steam Sterilization
• Saturated steam is an extremely effective carrier of thermal energy that makes it many
times more effective in conveying the necessary energy to the items to be sterilized than
dry air.
• Steam is an effective sterilant in that it can soften any resistant and protective outer
layer of the microorganisms allowing coagulation of the inner sensitive portion of the
microorganisms.
Advantages
• Most commonly used effective method of sterilization.
• Sterilization cycle time is shorter in steam sterilization than in any other type of
sterilization.
Limitations
• Requires a continuous source of heat (wood fuel, kerosene, or electricity).
• Requires a trained biomedical technician to perform preventative maintenance.
• Requires strict adherence to time, temperature, and pressure settings.
• Difficult to produce dry packs because breaks in procedure are common (e.g., not
allowing items to dry before removing, especially in hot, humid climates).
• Repeated sterilization cycles can cause pitting and dulling of cutting edges of instruments
(i.e., scissors).
• Plastic items cannot withstand high temperatures.
There are three types of high-pressure steam sterilizers:
• Gravity displacement

• Prevacuum
• Flash or immediate use sterilizers
Gravity Displacement Sterilizers
Tabletop models are relatively simple to operate. They are essentially horizontal pressure cookers
(figure 7.4). A pool of water in the bottom of the sterilizer is heated until it turns into steam using a
power source of electricity or kerosene. The steam then rises to the top of the chamber because it is
lighter than the cool air in the chamber. As more and more steam is produced, the cool air is forced
out of the chamber through the drain near the bottom of the chamber. When the steam pushes all the
cool air out, steam enters the drain, triggering the thermally (heat) regulated valve to close. Once the
valve is closed, the steam continues to build up pressure until the operating temperature (normally
121 °C/250 °F) is reached. The timer can now be activated and be counted down. At the end of the
cycle (normally 20 minutes for unwrapped items and 30 minutes for wrapped items), the relief valve
opens to allow the steam to escape. Usually the steam passes through the water reservoir where it
condenses back to water and thus does not enter the room. After the pressure on the gauge reads zero,
the door can be opened 12cm to 14cm (5 to 6 inches). Items inside it should be left to cool for 30
minutes. If steam is still present (and the chamber is quite warm), condensation of the moist air may
cause wetness of the items or packs if they are placed on a cool or cold surface.
Figure 7.4. Simplified diagram of a gravity displacement steam sterilizer
Adapted from: Tietjen et al. 1992
Prevacuum Sterilizers
These sterilizers are similar to the gravity displacement sterilizers except that they have a vacuum
pump system to remove the air in the chamber before the steam is let in. This step reduces the
total cycle time. Most prevacuum sterilizers are operated at the same temperature (121 °C/250 °F)
as gravity displacement sterilizers. However, a special type of vacuum sterilizer, called a high-
speed vacuum sterilizer is operated at a higher temperature (134 °C/275 °F). The vacuum system not
only shortens the cycle time, but also reduces the chance of creation of air pockets. Because a
prevacuum sterilizer is more complex to operate, it is necessary to monitor its functioning closely
and maintain it on regular basis.

Flash Sterilizers
These are small tabletop prevacuum sterilizers, usually located in operating rooms or adjacent to
them. They operate at a higher temperature (134 °C/275 °F) and thus have a shorter cycle time.
Due to their small size, their use is normally limited to the sterilization of unwrapped surgical
instruments for emergency purposes (e.g., dropped instruments).
Most healthcare facilities often use gravity displacement sterilizers. In most countries, high-speed
vacuum and flash sterilizers are usually found only in large referral hospitals (Webb 1986).
Operation
Instructions for operating the steam sterilizers (autoclaves) and their routine maintenance should be
included in the basic training of healthcare staff. A steam sterilizer will reliably sterilize items only
when kept in good working condition and operated correctly. Sterilization by steam requires four
conditions: adequate contact, sufficient temperature, proper time, and sufficient moisture. Even if
these conditions are all necessary for sterilization to take place, sterilization failures in clinics and
hospitals are most often caused by the lack of steam contact or failure to attain the adequate
temperature (Webb 1986).
Contact
The most frequent reason for sterilization failure is the lack of contact between the steam and the
microorganisms. This failure may be related to human error or mechanical malfunction. Frequent
causes of steam contact failure include:
• Failure to clean the object being sterilized adequately.
• Instruments that are closed locked or stacked.
• Packages wrapped too tightly.
• Packs that are overstuffed.
• Wrong position of the container
• Clogged strainer
• Other mechanical problems
Temperature
The next most important factor in steam sterilization is temperature. The most commonly used
temperature for steam sterilization is 121 °C (250 °F). When an object at room temperature is placed
in a sterilizer, the steam transmits thermal energy to the object until the object reaches the same
temperature as the steam. Under normal circumstances, this equilibrium occurs in a few minutes.
If the steam is unsaturated (too dry) or if the steam is prevented from reaching all parts of the object,
the temperature may never reach the level required for sterilization. The only way to be certain that
the sterilizer is working correctly is to make sure that the temperature at all points inside the load
has reached the full operating temperature of 121 °C (250 °F).

Timing
Just as it takes a certain amount of time to cook food, sterilization/killing microorganisms does need
time to do the work. In both cases, the hotter the temperature, the less time is required. Sterilization
time is measured in D-values. A D-value is the amount of time required to kill 90% of the
microorganisms present. Different microorganisms are killed in different scales/measures of time.
In other words, each kind of microorganism has a different set of D-values corresponding with certain
measure/level of temperature.
Moisture
Last, but surely not least, is the moisture requirement. Adequate moisture content of the sterilizer
atmosphere is mandatory for effective sterilization by steam.
Adequate moisture content implies that the steam must be “saturated,” having a relative humidity of
100%. When any cool object is placed in the sterilizer, the steam at the surface of the object cools
and becomes supersaturated. Water begins to condense on the surface of the object. This
condensation produces two immediate effects:
• The volume of gas in the sterilizer chamber decreases as the steam (water vapor) changes
to liquid state and more steam is drawn into the chamber and, hence, comes into
increased contact with the articles being sterilized.
• A very large amount of thermal energy is transferred to the object, raising the
temperature of the article significantly. The amount of heat released is best explained
by comparing the calories required to change the temperature of steam against the
calories absorbed when water is converted to water vapor (steam).
If the steam is not saturated (less than 100% relative humidity), two problems will soon develop that
individually or together interfere with the adequacy of the sterilization process:
• Articles in the sterilizer will remain dry and the microorganisms present cannot be killed
as readily as under wet conditions. (Water vapor softens the capsules of microorganisms
making them more vulnerable to destruction by heat.)
• Articles in the sterilizer will remain “cool” much longer, especially if they are wrapped.
Again, using the home kitchen as an example, if a kettle of beans is placed in an oven
(dry heat), it may take hours for them to cook. On the other hand, if they are placed in a
pressure cooker (saturated steam), they will cook much more quickly. Saturated steam is
a much better “carrier” of thermal energy than dry air.
In summary, saturation of the steam is vital to sterilizer operation because water vapor is the best
carrier of thermal energy, which at times makes the microorganisms more vulnerable to destruction
by heat (Webb 1986).
Effective Sterilization Depends on Correctly Following Procedures of the Process
The procedures include:
• Routine maintenance

• Preparing items to be sterilized
• Packaging and wrapping
• Loading
• Operating
• Unloading the sterilizer
It is only when all these procedures are strictly undertaken that items would certainly be sterilized.
Routine Maintenance
Although there are many brands of steam sterilizers, routine maintenance practices are generally the
same regardless of the make or type. For routine maintenance:
• The outlet screen (or pin-trap) should be removed daily and cleaned using a mild soap
and brush under running water.
• The chamber should be cleaned daily using a soft cloth, or for large sterilizers, a long-
handled mop that is used only for this purpose. Do not use abrasives or steel wool
because they may scratch the stainless steel surface and increase the occurrence of
corrosion.
• All door gaskets should be cleaned daily with a lint-free cloth and checked for defects.
Defective rubber gaskets should be replaced.
• The carriage (loading cart used to hold the packs placed in a sterilizer) should be cleaned
daily using a mild soap and lint-free cloth. (The wheels of the loading cart should also be
cleaned at this time, removing any string or other debris.)
• The exhaust line (or chamber drain) should be flushed weekly. This will keep the drain
free of substances that might hinder air or steam removal from the chamber. Before
flushing the exhaust line, check the maintenance instructions because trisodium
phosphate solution (a special type of soap) is often recommended (Department of
Health, Education and Welfare 1975; Webb 1986).
This solution can be prepared by adding one ounce of trisodium phosphate to one liter (one
quart) of hot water. If this chemical is not available, the exhaust line can be flushed with hot water
containing a mild soap solution. To do this, one should first remove the screen. Then pour one liter
(one quart) of the solution down the drain using a funnel. Complete the process by pouring a liter of
hot water to rinse out the soap and replace the screen. Usually, high-pressure steam sterilizers
(autoclaves) also have specific instructions on their operation and routine maintenance. Managers
should make copies of these instructions to make available to service staff. If replacement copies are
needed, they can be obtained by writing to the individual manufacturer (normally the address can be
found on the autoclave) or the donor agency providing with the equipment.
Note: To aid the prevention of dulling of the sharp points and cutting edges, wrap the sharp edges and needle
points in gauze before sterilizing. Repair (sharpen) or replace instruments, as needed.

Loading and Unloading
Objectives
• To load items into the autoclave in such a way that it allows passage of the most steam
through the load.
• To unload the steam autoclave so as to maintain the sterility of the items processed
through a sterilizing cycle.
General Principles
• The total weight of an individual pack should not exceed 11 kg (24 pounds).
• When loading, leave sufficient space for steam to circulate freely and avoid overloading.
Always leave three inches between the top-most pack and the top of the chamber. Items
should not touch the chamber wall. Never overload the sterilization chamber.
• Do not place packages on the floor of the chamber.
• Place all packs (linen, gloves, etc.) on edge and place canisters, utensils, and treatment
trays on their sides.
• Place instrument sets in trays having mesh or perforated bottoms flat on the shelves.
• In combination loads of cloth (or paper) packs and instruments trays, place linens on top
shelves and trays on lower shelves. This prevents any condensation (moisture), which
forms on cool metal when steam initially contacts with the item from dripping onto linen
packs (Department of Health, Education and Welfare 1975).
• Load packages containing similar types of items in one load, when possible. For example,
all textile packs should be sterilized in one cycle.
• Surgical gloves should be sterilized by themselves or placed on the top shelves.
• Nested packs should be positioned in the same direction to help prevent air pockets so
that the condensation can drain and the steam can circulate freely. Shelves (metal wire) or
a loading cart must be used to ensure proper loading. It is preferable to use the cart that
comes with the sterilizer (figure 7.5).
Note: If an item goes in wet, it will come out wet. All items (instruments, basins, and glassware) must be dry
before being loaded into the sterilizer. This helps prevent “wet packs.” The sterilizer is capable of drying items
that have become moist during a properly loaded and operated sterilization process, but it still cannot remove
excess moisture.
Metals and Glassware
• Instrument sets should not exceed 8 kg (18 lbs.). Basin sets should not exceed 3 kg (7 lbs.).
• This is done for reasons of limiting the amount of condensation that forms when steam
contacts cool metal. Using these limits ensures that the items will dry during the
sterilization cycle.

• Solid containers should be placed on their sides to allow airflow out of them. If air is
trapped in a solid container, it will prevent the steam from contacting the inner surface
and prevent sterilization.
Linens
• Linen packs should not be too large and heavy (not more than 5 kg or 12 lbs.) to secure
better steam penetration of the pack in 30 minutes (the time allowed for sterilizing
wrapped items).
• Packs containing sheets, table covers, and towels are most impenetrable, and it is difficult
for the steam to reach each fiber. Such packs must be placed on the edge of the shelf to
insure better steam penetration.
Figure 7.5. Loading the steam sterilizer
Liquids
• Sterilize liquid and solution bottles separately from all other items.
• Liquids must be sterilized by themselves. The amount of liquid in the bottle, not the
size of the container, determines the time required for sterilization.
• Use only borosilicate heat-resistant glass (Pyrex®).

• Use only automatic self-sealing caps for closure.
Combination Loads
• In loads that combine linens (fabrics) and metal items, place linens on top shelves and
metal items below. This prevents condensation from dripping onto the linen packs,
causing them to absorb the excess moisture.
• When a load is made up of wrapped and unwrapped items requiring different times to
ensure sterilization, the longest required time (i.e., 30 minutes) must be used.
• The fundamental rule in loading the sterilizer is to prepare all items and arrange the load
in such a manner as to encounter the least possible resistance to the passage of steam
through the load (i.e., from the top of the chamber toward the bottom).
Unloading Tips
• Open the sterilizer door slightly 12‒14 cm (5‒6 inches) at the end of the cycle (when the
chamber gauge reaches “0”) and allow items to remain inside to reduce the potential for
condensation (formation of water drops on the packages).
• Allow instrument packs to dry completely before removal (usually takes 30 minutes).
Cooling time could be as long as two hours, based on room temperature and humidity.
• Do not handle the packs during the cooling time.
• Place sterile trays and packs on surfaces padded with paper or fabric (avoid placing warm
packs on cold metal surfaces so as to prevent condensation).
• Store when packs reach room temperature (usually takes about one hour).
• Sterilized packs and articles should be handled gently and used as reasonably as possible.
• Return any pack that drops on the floor for reprocessing (remove items from the package
and repackage before reprocessing).
(Acosta-Gnass, Stempliuk 2009; Tietjen, Bossemeyer, McIntosh 2003)
If a pack is dropped, turns out to be moist, or comes into contact with moisture, it must be
considered contaminated.
Steam Sterilizing Liquids
Sterile water can be prepared only by steam sterilization.
Instructions
• All liquids should be in heat-resistant glass (Pyrex) closed with automatic self-sealing caps.
• Load steam sterilizer with liquids only.
• Wait until the thermometer indicator shows 121 °C (250 °F) and 106 kPa (15lbs/in2).

• Time the sterilization using a clock. The amount (volume) of solution in the bottle
determines the sterilization time, not the size of the bottle:
75 to 200 ml 20 minutes
Note: If bottles of solutions with different volumes are sterilized in the same load, use the sterilization
time recommended for the bottle containing the largest volume of liquid.
• When the sterilization cycle has ended, release the pressure slowly, taking not less than
15 minutes, until the chamber pressure is at “0.” Turn the operating valve off and open
the door only 1 cm (½ inch). (Suddenly opening the door all the way after a sterilization
cycle could cause liquids to boil over or bottles to burst.) Wait an additional 30 minutes
for the chamber to cool before removing the load.
Instructions for Operating a Steam Sterilizer
STEP 1 Thoroughly clean and dry all instruments and other items to be sterilized.
STEP 2 All jointed instruments should be in an open or unlocked position, whereas instruments
composed of more than one part or sliding parts should be disassembled.
STEP 3 Instruments should not be held tightly together by rubber bands or by any other means
that will prevent steam contact with all surfaces.
STEP 4 Arrange packs in the chamber to allow the free circulation and penetration of steam to all
surfaces.
STEP 5 When using a steam sterilizer, it is best to wrap clean instruments or other clean items in
a double thickness of muslin or newsprint. (Unwrapped instruments must be used
immediately after removal from the sterilizer, unless they are kept in a covered, sterile
container.)
STEP 6 Sterilize at 121 °C (250 °F) for 30 minutes for wrapped items and 20 minutes for
unwrapped items; set time of the clock.
STEP 7 Wait 20 to 30 minutes (or until the pressure gauge reads zero) to permit the sterilizer to
cool sufficiently. Then open the lid or door to allow steam to escape. Allow the instrument
packs to dry completely before removal, which may take up to 30 minutes. (Wet packs
act like a wick drawing in bacteria, viruses, and fungi from the environment.) Wrapped
instrument packs are considered unacceptable if there are water droplets or visible
moisture on the package exterior when they are removed from the steam sterilizer
chamber. If using rigid containers (e.g., drums), close the gaskets.
STEP 8 To prevent condensation when removing the packs from the chamber, place sterile trays
and packs on a surface padded with paper or fabric.

STEP 9 After sterilizing, items wrapped in cloth or papers are considered sterile as long as the
pack remains clean, dry (including no water stains), and intact. Unwrapped items must
be used immediately or stored in covered sterile containers.
• Maintain a steam sterilizer log including heat begun, correct temperature, and
pressure achieved, heat turned down, and heat turned off.
• Each load should be monitored with mechanical (time, temperature, and
pressure) and chemical (internal and external chemical test strips) indicators.
• Autoclave should be tested daily with an air-removal test to ensure the
proper removal of air.
• If steam escapes from the safety valve or under the lid, the autoclave is not
working correctly. Rather, it is merely steaming items at low-pressure (which
may be equivalent to HLD, not sterilization).
• If steam escapes from the safety valve instead of the pressure valve, the
pressure valve must be cleaned and inspected.
• If steam escapes from under the lid, the gasket (rubber ring) must be cleaned and
dried or replaced.
Non-Electric Gravity Displacement Steam Sterilizer
To operate a non-electric gravity displacement steam sterilizer (figure 7.6):
Figure 7.6. Non-electric gravity displacement steam sterilizer
• Clean and dry all instruments to be sterilized.
• Put all jointed instruments in the opened or unlocked position. Disassemble instruments
composed of more than one part or sliding parts.

• Wrap clean instruments or other objects, as described earlier in this chapter. Instruments
should not be held tightly together by rubber bands or by any other means that will
prevent steam contact with all surfaces. (See the Packaging Medical Devices and Surgical
Instruments for Steam Sterilization section in this chapter.)
• Arrange packs loosely in the chamber to allow for the free circulation and penetration of
steam to all surfaces. Follow the manufacturer’s instructions for load size.
• Bring water to a boil until steam escapes from the pressure valve; turn down the heat but
keep steam coming out of the pressure valve. Do not allow the sterilizer to boil dry.
Steam should always be escaping from the pressure valve.
• Sterilize for 30 minutes for wrapped objects, 20 minutes for unwrapped objects. Time
with a clock. Start timing only after the temperature and pressure have reached the
required parameters.
• After the appropriate time, turn off the heat and wait about 30 minutes (or until the
pressure gauge reads zero) to permit the sterilizer to cool sufficiently before opening the
lid to allow steam to escape.
• Allow instrument packs to dry completely before removal; this may take an additional 30
minutes.
• Damp packs act like a wick, drawing in microorganisms from the environment. Wrapped
instrument packs are considered unacceptable if there are water droplets or visible
moisture on the outside of the package when removed from the sterilizer chamber.
• To prevent contamination by condensation, place sterile trays and packs on a surface
padded with paper or fabric after removing them from the chamber. (Do not store trays or
packs in a plastic dust cover until they reach room temperature; this usually takes about
one hour.)
Dry Heat Sterilization Method
Dry heat sterilization is caused by hot air that destroys microorganisms through oxidation that causes
slow destruction of the microorganism’s protein. Dry heat sterilization methods have limited value
because it is difficult to maintain the same temperature throughout the process. Moreover, dry heat
sterilization takes longer than steam sterilization because the moisture in the steam sterilization
process significantly speeds up the penetration of heat and shortens the time needed to kill
microorganisms. When available, dry heat is a practical means by which needles and other sharp
instruments are sterilized. Dry heat sterilization can be achieved with a simple oven as long as a
thermometer is used to verify the temperature inside the oven. Dry heat sterilization is accomplished
by thermal (heat) conduction. Initially, heat is absorbed by the exterior surface of an item and then
passed to the next layer. Eventually, the entire object reaches the temperature needed for
sterilization.

Note:
Just as with steam sterilization, thorough cleaning of the object before dry heat sterilization is critical. If an
instrument is not properly cleaned, effective sterilization cannot be ensured regardless of how long the
instrument is heated.
Advantages
• An effective method as dry heat reaches all surfaces of instruments by conduction, even
for instruments that cannot be disassembled.
• Protective of sharps or instruments with a cutting edge (fewer problems with dulling of
cutting edges).
• Leaves no chemical residue.
• Eliminates “wet pack” problems in humid climates.
Limitations
• Plastic and rubber items cannot be dry heat sterilized because temperatures used (160 to
170 °C) are too high for these materials.
• Dry heat penetrates materials slowly and unevenly.
• Requires oven and continuous source of electricity
Conditions for Effective Use of Dry Heat Sterilizers
• Adherence to specific instructions: Instructions about the load, volume, and thermal
resistance of the material must be considered at all times.
• Airflow rate and distribution: Irrespective of how airflow and air distribution are
managed, they affect heat energy transfer efficiency. The heated air must be distributed
uniformly within the load. Optimum air speed reduces microbial resistance by
dehydrating cells and thus reduces sterilization time.
• Load configuration and distribution: The size and density of the load and the number
and shape of the instruments affect airflow and air distribution.
• Temperature: The higher the temperature, the shorter the exposure time. The range is
from 121–180 °C (250–356 °F), but 160–170 °C (320–338 °F) is the optimum.
• Time: The time depends on the temperature chosen.
Instructions for Operating a Dry Heat Oven
To ensure correct operation, consult specific operating instructions supplied by the oven’s
manufacturer.
STEP 1 Decontaminate, clean, and dry all instruments and other items to be sterilized.

STEP 2 If desired, wrap instruments in aluminum foil or place in a metal container with a tight-
fitting closed lid. Wrapping helps prevent recontamination before use. Hypodermic or
suture needles should be placed in glass tubes with cotton stoppers.
STEP 3 Place loose (unwrapped) instruments in metal containers or on trays in the oven and heat
them to the desired temperature.
STEP 4 After the desired temperature is reached, begin timing. The following temperature/time
ratios are recommended (APIC 2002):
170 °C (340 °F) 60 minutes
160 °C (320 °F) 120 minutes
150 °C (300 °F) 150 minutes
140 °C (285 °F) 180 minutes
121 °C (250 °F) overnight
Note: Use dry heat only for items that can withstand a temperature of 170 °C (340 °F) (Perkins 1983).
Needles and other instruments with cutting edges should be sterilized at lower temperatures (160 °C [320
°F]) because higher temperatures can destroy the sharpness of cutting edges (Perkins 1983).
Depending on the temperature selected, the total cycle time (preheating, sterilization
time, and cool down) will range from about 2.5 hours at 170 °C to more than 8 hours at
121 °C.
STEP 5 After cooling, remove packs and/or metal containers and store.
Loose items should be removed with sterile forceps/pickups and used immediately or
placed in a sterile container with a tight-fitting lid until the time of use.
Dry heat:
• Heat treatment in 170 °C (340 °F) for an hour (total cycle time—placing instruments in
the oven for one hour, and then cooling for 2 to 2.5 hours), or
• Heat treatment in 160 °C (320 °F) for 2 hours (total cycle time is from 3 to 3.5 hours).
Preventing Errors
• Sterilization equipment should be calibrated and processes should be validated.
• The coldest point should have a minimum temperature of 170 °C (338 °F) for sterilization
to be effective.
• Instruments should be wrapped in materials that can withstand high temperatures
(aluminum foils, stainless steel containers, peel pouches).
• Do not stack the packages tightly; leave enough room between surfaces.
• Carry out chemical and biological controls on a regular basis as per the manufacturer’s
instructions.

Chemical Sterilization
Chemical sterilization is an alternative to high-pressure steam or dry heat sterilization; it is often
called “cold sterilization.” If objects need to be sterilized, and when the available methods such as
high-pressure steam or dry-heat sterilization would damage them or equipment are not available (or
operational), they can be chemically sterilized.
Many chemicals, both in liquid and gas form, are available for processing instruments. Chemicals that
are approved as sterilants can also be used as HLDs, but those approved only for HLD cannot be used
as sterilants. Formaldehyde is no longer included as a sterilant or a HLD due to its toxicity (table 7.3).
Table 7.3. Liquid chemicals used for sterilization
Chemical Sterilan
t
Soak time for
sterilization
HLD
?
Soak time for
HLD
Effectiv
e life
Glutaraldehyde
2%–4%
Yes 10 hrs at 20–25 °C
(68–77 °F)
or
7 hrs, 40 min at 35
°C (95 °F)
Yes 20–90 min at 20–
25 °C (68–77 °F)
14 days
Glutaraldehyde
3.4% and
isopropanol 20.1%
Yes 8 hrs at 20 °C (68
°F)
Yes 10 min at 20 °C (68
°F)
14 days
Hydrogen peroxide
7.5%
°F)
Yes 30 min at 20 °C (68
°F)
21 days
Peracetic acid
0.31%–0.38%
°F)
Yes 5 min at 25 °C (77
°F)
5 days
Hydrogen peroxide
8.3% and paracetic
acid 7%
°F)
Yes 5 min at 25 °C (77
°F)
5 days
Hydrogen peroxide
1.0% and paracetic
acid 0.08%
°F)
Yes 25 min at 20 °C (68
°F)
14 days
Adapted from: FDA 2015; Rutala, Weber, Healthcare Infection Control Practices Advisory Committee 2008
Instructions for the Use of Chemical Sterilization
STEP 1 Thoroughly clean and dry all instruments and other items to be sterilized.
STEP 2 Check the expiry date on the container and prepare the chemical sterilant solution
following the manufacture’s instruction.
STEP 3 Completely submerge items in a clean container filled with the chemical solution and
place the lid on the container for the recommended period of time.
STEP 4 Remove objects from the solution with sterile forceps; rinse all surfaces three times in
sterile water; and air dry them. Ideally, three separate (sequential) rinse containers
should be used.
STEP 5 Store objects in a sterile container with a tight-fitting lid if they will not be used
immediately.

Monitoring Sterilization Procedures
Sterilization procedures can be monitored routinely using a combination of biological, chemical, and
mechanical indicators as parameters. Different sterilization processes have different monitoring
requirement.
Biological Indicators
Monitoring the sterilization process with reliable biological indicators at regular intervals is strongly
recommended. Measurements should be performed with a biological indicator that employs spores
of established resistance in a known population. The biological indicator types and minimum
recommended intervals should be:
• Steam Sterilizers: A highly resistant but relatively harmless (nonpathogenic)
microorganism called Geobacillus stearothermophilus is used to test steam sterilizers. As
used in hospitals and clinics to test sterilizers, this microorganism has a D-value of about
two minutes at 121 °C (250 °F). In other words, it would take two minutes at 121 °C (250
°F) to kill 90% of the test microorganisms present. Through research, mathematical
calculation and intelligent “guesses,” authorities have generally agreed that for normal
hospital sterilization, about six Geobacillus stearothermophilus D-values (or about 12
minutes) should be sufficient to kill essentially all pathogenic microorganisms and give a
large margin of safety. For reasons of the absence of internal temperature sensing devices,
such as temperature-specific chemical indicators in many countries, extra time is
recommended as an added safety margin. Therefore, twenty minutes for unwrapped and
30 minutes for wrapped packs are considered sufficient to kill most microorganisms. This
biological indicator should be done weekly, and as deemed necessary.
• Dry-Heat Sterilizers: Bacillus subtilis is used as an indicator on a weekly basis, and
as deemed necessary. Similar to Geobacillus stearothermophilus, the recommended time
and temperature are found to be effective in the sterilization of the instruments.
Chemical Indicators
Chemical indicators include indicator tape or labels that monitor time, temperature, and pressure for
steam sterilization and for dry heat sterilization. These indicators should be used on the inside and
outside of each package or container.
• External i ndicators are used to verify whether the items have been exposed to the
correct conditions of the sterilization process and the specific pack has been sterilized.
• Internal indicators are placed inside a pack or container in the area most difficult for
the sterilization agent to reach (i.e., the middle of a linen pack). This is the indicator that
tells whether the item has been sterilized.
Chemical indicators, such as heat sensitive tape or glass vials containing pellets that melt at certain
temperatures and duration, do not imply achieved/successful sterilization. However, they do indicate
whether mechanical or procedural problems have occurred in the sterilization process.
Mechanical Indicators

Mechanical indicators for sterilizers provide a visible record of the time, temperature, and pressure
for the sterilization cycle. This is usually a printout or graph from the sterilizer or it can be a log of
time, temperature, and pressure kept by the person responsible for the sterilization process that day.
Storage
All sterile items should be stored appropriately to protect them from dust, dirt, moisture, animals,
and insects. The storage area should be located next to the place of sterilization or connected to it in
a separately enclosed area with limited access that is used just to store sterile and clean patient care
supplies. In smaller clinics, this area may be just a room close to the Central Supplies Department or
in the operating room.
Instructions for Storing Sterile Items
1. Keep the storage area clean, dry, dust-free, and lint-free.
2. Control the temperature and humidity (approximate temperature 24o
C and relative
humidity <70%) when possible.
3. Packs and containers with sterile (or high-level disinfected) items should be stored 20cm to
25 cm off the floor, 45cm to 50cm from the ceiling, and 15cm to 20cm from an outside wall.
4. Do not use cardboard boxes for storage because cardboard boxes shed dust and debris
and may harbor insects.
5. Date and rotate the supplies (first in/first out). This process serves as a reminder, but does not
guarantee sterility of the packs.
6. Distribute sterile and high-level disinfected items from this area.
Shelf Life
• The shelf life of an item (how long items can be considered sterile) after sterilization is
event-related. An item remains sterile until something causes the package or container to
become contaminated as time goes on since sterilization is not the determining factor.
• To make sure that items remain sterile until you need them, prevent events that can
contaminate sterile packs and protect them by placing them in plastic covers (thick
polyethylene bags). An event can be a tear or worn-out area in the wrapping, the package
becoming wet or anything else that will enable a microorganism to enter the package or
container.
• Before using any sterile item, look at the package to make sure that the wrapping is intact
and the seal is unbroken, clean, and dry (and having no water stains).
• If the quality of the wrapping clothes is poor and plastic bags are not available,
limiting the shelf life is a reasonable option to resort to and to secure the sterility of the
instruments.
The Shelf Life of Sterilization Depends on the Following Factors
• Quality of the wrapper or container.

• Number of times a package is handled before use.
• Number of people who have handled the package.
• Whether the package is stored on open or closed shelves.
• Condition of storage area (e.g., humidity and cleanliness).
• Frequent or improper handling or storage.
• Use of plastic dust cover and method of sealing (AORN 1992).
Note: To make sure that items remain sterile until you need them, prevent events that can contaminate sterile
packs, and protect them by placing them in plastic covers (bags).
In some healthcare facilities, where replacement of supplies is limited and the cloth used for wrapping
is of poor quality, time as a limiting factor also serves as a safety margin. If plastic covers
(bags) are unavailable for the sterilized items, limiting the shelf life to a specific length of time (e.g.,
one month) may be a reasonable decision as long as the pack remains dry and intact.
Other Sterilization Methods
Gas Sterilization: One of the first uses of formaldehyde gas was to fumigate rooms, a practice that
has long been proven to be ineffective and unnecessary (Schmidt 1899). Due to the irritating nature
of its vapor on the skin, eyes, and respiratory tract, and its carcinogenic effects, the use of
formaldehyde in this form should be limited.
Ethylene oxide (ETO) is the other gas that is most frequently used in the United States and several
other countries for sterilization of heat- and moisture-sensitive surgical instruments, such as plastic
devices and delicate instruments. However, sterilization using ETO is a more complicated (requires
a two-hour exposure time and a long aeration period) and costly process than either steam or dry
heat sterilization because items that are sterilized by ETO need to be aerated (exposed to the
outside) so that the residual ETO gas can diffuse out of the packages and items. This can take longer,
leading to complete cycle times of 24 hours or more (Steelman 1992). Moreover, it requires
sophisticated equipment and skilled staff specially trained for its safe use, making it impractical
for use in many countries (Gruendemann, Mangum 2001). ETO is also hazardous to HCWs, patients,
and the environment.
Because ETO is moderately toxic when inhaled, regular exposure to low levels (greater than one part
per million) may produce harmful effects in humans. Moreover, the gas is irritating to the eyes and
mucous membranes. Likewise, the residual ETO on instruments can cause skin injuries and
inflammatory reactions in patients. Above all, because of the toxicity of this gas and category as a
potential carcinogen and mutagen, the disposal of it is difficult (Gruendemann, Mangum 2001).
Ultraviolet Light Sterilization
Ultraviolet (UV) light has been used to help disinfect the air for more than 50 years (Morris
1972). However, UV irradiation has limited energy; UV light does not penetrate dust, mucous, or
water. Therefore, despite the manufacturer’s claims, it cannot be used to sterilize water.

Theoretically, an intense UV light can be both bactericidal and veridical; however, practically, it was
found that only limited disinfection of instruments can be achieved. For surfaces that cannot be
reached by the UV rays (e.g., inside the barrel of a needle or laparoscope), any microorganisms
present will not be killed (Morris 1972). For these and other issues, UV radiation is neither practical
nor effective method in most situations (Riley, Nardell 1989).
Sterilization for Prion Disease
Prion diseases, such as Creutzfeldt-Jakob disease (CJD), are a group of degenerative brain diseases
that have received much attention during the past few years. They occur in animals (dogs, cows,
and primates) and in humans, and are rapidly fatal once symptoms develop. In humans, CJD remains
rare, with an incidence of less than one per million in the general population (Holman, et al. 1996).
CJD poses a unique IP problem because prions that are protein-containing infectious agents can
survive recommended heat or high-pressure steam sterilization processes. In addition, chemical
disinfectants, including such sterilants as gluteraldehyde and formaldehyde, are not strong enough
to eliminate the infectivity of prions on contaminated instruments and other items. Therefore, surgical
instruments and other critical devices contaminated with high-risk tissue (i.e., brain, spinal cord, and
eye tissue) from patients with known or suspected CJD require special treatment (Weber, Rutala
2001).
For handling and processing of prion-contaminated instruments, please refer to Jhpiego’s Infection
Prevention and Control: Reference Manual for Health Care Facilities with Limited Resources (2018)
or WHO and PAHO’s Decontamination and Reprocessing of Medical Devices for Heath Care
Facilities (2016).
SUMMARY
Applying Spaulding’s classification of non-critical, semi-critical, or critical items determines the
method that should be used to process instruments. Cleaning is the most important step in instrument
processing because it makes instruments safer for additional processing, prevents bioburden from
drying on instruments, and ensures that there are no residual bioburden or cleaning chemicals on the
instruments that may interfere with the subsequent HLD or sterilization process. Policies should be
in place and all HCWs who perform instrument cleaning throughout the facility should be trained
and competent in the appropriate way to clean surgical instruments and other equipment. All semi-
critical instruments and devices that come into contact with mucous membranes and non-intact skin
should be, at a minimum, high-level disinfected. HLD can be carried out by soaking in a high-level
disinfectant, steaming, or by boiling. Sterilization of medical devices and surgical instruments plays
a vital role in reducing surgical site infections and infection as a result of other invasive procedures.
Monitoring the quality of the sterilization process and appropriately following recommendations will
assist healthcare facilities to optimize the safety of sterile medical devices and surgical instruments
used for patient care.

Table 7.4. Preparing and using chemical disinfectants

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CHAPTER 7: DECONTAMINATION AND REPROCESSING OF MEDICAL DEVICES (INSTRUMENT
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Chapter 8: Processing Reusable Textiles and Laundry Services 188
CHAPTER 8: PROCESSING REUSABLE TEXTILES AND
LAUNDRY SERVICES
Key Topics
• Minimum requirements for standard laundry
• Periodic monitoring and routine maintenance issues
• Key steps in processing textiles
• The use of PPE
• Collecting, transporting, and sorting used textiles
• Washing and drying (laundering) used textiles
• Storing, transporting, and distributing hygienically clean textiles
BACKGROUND
Although soiled textiles may contain large numbers of microorganisms, there is little risk to health
workers during textile processing. If work-related infections occur, it often happens because HCWs
are not using gloves or other PPE, or are not washing their hands during or after collecting,
transporting, and sorting soiled items. Therefore, no special precautions are necessary, regardless
of a patient’s diagnosis, if standard precautions are taken in all situations.
Minimum Requirements for Standard Laundry
• Maintain the receiving area for contaminated textiles at negative pressure compared
with the clean areas of the laundry in accordance with the FMOH Infrastructure
Directorate construction standards for healthcare facilities in effect during the time of
facility construction.
• Ensure that laundry areas have handwashing facilities and products, and appropriate
PPE available for workers.
• Use and maintain laundry equipment according to the manufacturer’s instructions.
• Do not leave damp textiles or fabrics in machines overnight.
• Disinfection of washing and drying machines in residential care is not needed as long
as gross soil is removed from items before washing. Therefore, proper washing and
drying procedures are sufficient.
Periodic Monitoring
• Monitoring/inspection of the laundry unit on a weekly basis (cleanness, functionality,
availability of all necessary detergent, PPE, and water, and all activities, including
collection, storage, and recording/information [to assess work efficiency] of the unit).
Facility should develop a monitoring checklist that includes the above requirements.
• Include the laundry activity in weekly, monthly, quarterly, and yearly plans and
report accordingly.

• Use microbiologic sampling during outbreak investigations if epidemiologic
evidence indicates a role for healthcare textiles and clothing in disease transmission.
Maintenance of the Laundry
• Use and maintain laundry equipment according to the manufacturer’s instructions.
• Make sure that spare parts are available for parts that can be easily damaged and needing
replacement on a regular basis.
• Train laundry staff on user’s maintenance and assign a focal person for managing the
machine and reporting.
Types of Personal Protective Equipment to Use in the Laundry
Utility gloves, plastic or rubber apron, protective eyewear, and closed shoes that protect the feet from
dropped items and spilled blood and body fluids should always be used when collecting and handling,
transporting, sorting, and handwashing soiled textiles or loading them in automatic washers.
Note: If utility gloves are not available, putting on two pairs of examination or reprocessed surgical
gloves (double gloving) provide some protection for staff responsible for collecting, transporting, and
sorting soiled textiles and other items.
Processing Textiles
Processing textiles consists of all steps required to collect, transport, and sort soiled textiles
and to launder (wash, dry, and fold or pack), store, and distribute them. Safely processing textiles
from multiple sources is a complex process. To reduce the risk of contamination, procedures should
be in place to safely handle, process, and store textiles.
Staff handling the textiles should be properly trained on the processing procedures and should
protect themselves by applying standard precautions while collecting, transporting, and sorting
soiled textiles. They should wear thick utility or heavy-duty household gloves to minimize the risk
of accidental injury from a needle stick or other sharp object, including broken glass. Staff
responsible for washing soiled items should wear utility gloves, protective eyewear, and plastic or
rubber aprons and rubber boots.
Table 8.1. Recommended PPE for processing textiles
Activity Type of PPE
Collecting soiled textiles Thick utility or heavy-duty household gloves
Transporting soiled textiles Closed-toe shoes to minimize the risk of accidental injury
from sharp objects or contact with blood or body fluids
Sorting soiled textiles Thick utility or heavy-duty household gloves
Handwashing soiled textiles Protective eyewear and mask or face shield
Loading washers Fluid-resistant gowns or plastic or rubber aprons
Handling disinfectant cleaning solutions Closed-toe shoes
Source: OSHA n.d.; Sehulster, Chinn, Arduino, et al. 2015

Principles and Key Steps in Processing Textiles
• Wear heavy-duty utility gloves and other PPE when collecting, handling, transporting,
sorting, and washing soiled textiles (see the section on PPE).
• Use PPE for standard precautions, carefully scrape off solid body fluids (e.g., stool or
vomit) using a firm, flat object, and dispose in the toilet or sluice before the item is
placed in the collection container.
• Use leak-proof containers for all textiles, or at least those grossly contaminated with
blood or body fluids, to protect staff from exposure to blood and body fluids.
• Do not sort textiles in patient care areas.
• Confine the soiled textiles to designated areas until transported to the laundry. Using the
principles of standard precautions, handle all discarded textiles as soiled, including items
on which there is no visible contamination.
• All textiles present during procedures, regardless of whether they are visibly dirty or
were used in the procedure, such as sterile towel drapes contained in an opened surgical
pack that were not used during the procedure, must be laundered before they can be
sterilized and reused.
• Transport textiles in covered containers or closed bags.
• Handle soiled textiles with minimum agitation to avoid contamination of the air,
surfaces, and individuals.
• Handle soiled textiles as little as possible and with minimum contact to avoid accidents,
injuries, and the spread of microorganisms.
• Sort textiles in the laundry area carefully before washing.
• Follow special guidelines for textiles used in isolation areas for patients with highly
infectious diseases (e.g., VHF). Consult the FMOH or WHO IPC guidelines.
Collecting, Transporting, and Sorting Used Textiles
Design, Ventilation, and Space Requirements for Processing Textiles
• Processing areas for textiles should be physically separated from the patient care and
food preparation areas.
• Laundry areas should have hand hygiene facilities.
• Processing areas for soiled textiles must be physically separated (e.g., divided by walls)
from areas used for folding and storing clean textiles. If separate rooms are not possible,
a physical barrier between the clean and soiled textile areas should be constructed.
• Processing areas considered “soiled areas” should be adequately ventilated.
• For facilities with natural ventilation, airflow should be away from other areas and the
air should be exhausted out of the building.

Collecting, Handling, and Transporting Used Textiles
After invasive medical or surgical procedures or when changing textiles in patient rooms, the
following precautions and procedures should be applied in each situation (CDC 2011; Sehulster,
Chinn, Arduino, et al. 2015). There are special guidelines for textiles used in isolation areas for
patients with highly infectious diseases (e.g., VHF).
Collecting
• Collect and remove soiled textiles from patient rooms after each procedure daily, or as
needed.
• Use standard precautions, including PPE (see above), when collecting used textiles.
• Do not sort textiles in patient care areas.
• Collect used textiles at the point of use. Use leak-proof containers for all textiles; cloth
bags are adequate for patient care textiles not soaked with blood or body fluids.
• Roll items that are heavily contaminated with blood or body fluids carefully into the
center of the item and place in a leak-proof bag or a container with a lid if leak-proof
bags are not available.
• Do not sort or rinse textiles heavily contaminated with blood and body fluids in patient
care areas.
• Label clearly or use color coded containers for collecting and transporting used textiles.
• Wash and dry containers routinely before subsequent use. (See the Environmental
Cleaning chapter in this volume for guidance on disinfectants.)
Note: If utility gloves are not available, put on two pairs of non-sterile gloves (double gloving). This provides
some protection for HCWs responsible for collecting, transporting, and sorting soiled textiles and other
items.
Handling
• Handle soiled textiles as little as possible. To avoid the spread of microorganisms in the
environment and among HCWs and patients, do not shake soiled textiles.
• It is not necessary to routinely double bag or use additional precautions for textiles used
by patients in isolation. Two bags may be indicated if the textile cannot be placed in the
bag without contaminating the outside of the bag.
Transporting
• Transport collected soiled textiles to the processing area in closed bags, containers with
lids, or covered carts.
• Transport soiled textiles and clean textiles separately. If there are separate carts, trolleys,
or containers available for soiled and clean textiles, they should be labeled accordingly.
If soiled and clean textiles are transported in the same cart or container:

o Clean the containers and trolleys or carts thoroughly after transporting soiled textiles
using disinfectant cleaning solution. (For detailed information, see Volume 1,
Chapter 9: Environmental Cleaning.)
o Keep soiled textiles in separate areas of the same cart from where clean textiles are
located and cover both.
Sorting Soiled Textiles
Careful sorting of textiles is extremely important for the safety of HCWs. Sorting must be carefully
performed because soiled textiles (e.g., large drapes and towel drapes) from the operating theater
and other procedure areas may contain sharps (e.g., scalpels, sharp-tipped scissors, hypodermic and
suture needles, and sharp-tipped towel clips). In addition, bedding from patients’ rooms may contain
soiled dressings (e.g., blood-stained or wet with other body fluids).
Sorting textiles allows for customization of washing processes for various categories of textiles or
soil level. It also increases efficiency during inspection, folding, ironing, etc. Soiled textiles may
also contain non-infectious items (e.g., coins and keys). These items pose no risk and should be
returned directly to the patient. Please note that:
• The processing area for soiled textiles must be separate from other areas used for folding
and storing clean textiles, patient care, and food preparation.
• Maintain adequate ventilation and physical barriers between the clean and soiled textile
areas.
• Do not sort or prerinse soiled textiles in patient care areas; they should be sorted in the
laundry area.
• Sort soiled textiles into appropriate wash loads by classification, such as color, type of
fabric, soil type or soil load, and/or type of item (e.g., white items, cloth nappies/diapers,
cotton/wool items, mop heads, surgical drapes).
• Always wear protective eyewear, utility gloves, appropriate footwear, and plastic or
rubber apron when handling soiled textiles.
• Wash hands after removing the gloves. Although infrequent infection is related to
sorting, they have been attributed to the failure of handwashing and proper use of PPE
(McDonald 2002).
Washing (Laundering) and Drying Textiles
All textiles (e.g., bed sheets, surgical drapes, and gowns) used in the direct care of a patient must be
thoroughly washed and dried before reuse. Laundering removes pathogens from textiles, making
them hygienically clean and ready for use. Laundered textiles are not sterile and are not required to
be, including for neonatal ICUs (Sehulster, Chinn, Arduino, et al. 2015).
Laundering standards in hospitals should address key, specific standards, for example, water quality
and temperature, amount of agitation needed, and chemical properties needed to properly clean
surgical attire. Effective laundering is dependent on the factors listed below, which, when used
together, have a greater effect than when used separately.

• Duration of cleaning
• Mechanical action (i.e., agitation)
• Chemicals used in the process
• Temperature of water and air in the dryer machine
If one of these factors is decreased (e.g., temperature), then other factors (e.g., chemicals,
mechanical action, or time) must be increased to result in the same level of cleanliness.
Laundering cycles consist of flush, main wash, disinfecting (bleaching), rinsing, and souring
(addition of a mild acid agent).
Decontamination of textiles by presoaking with soap, water, and chlorine solution before washing
is not necessary unless the item is heavily soiled or will be hand washed. Repeated soaking of
textiles in chlorine solution, even dilute solution, can cause the fabric to deteriorate more quickly.
Note: The storage time for soiled textiles before washing is a practical issue related to available storage
space and aesthetics, not an IP concern.
Handwashing Textiles
Using Cold Water
Using cold water saves energy. Cool water cycles rely heavily on the action of bleach to kill
microbes. Temperatures of 22–25o
C (71–77o
F) for washing textiles is satisfactory for removing
microbes if the water cycle, type of soap or detergent, strength of chlorine solution, and other
additives are used in proper concentrations. WHO recommends soaking textiles in 0.05%–0.5%
chlorine solution for 15–30 minutes and then washing with soap and water to remove the bleach
(AORN 2012; Fijan and Turk 2012; Sehulster, Chinn, Arduino, et al. 2015; South East Asia
Regional Office [SEARO]/WHO 2004).
Washing Textiles By Hand
The steps to properly hand wash textiles are:
STEP 1 Wear PPE while washing textiles by hand.
STEP 2 Separate heavily soiled textiles from non-soiled textiles and wash separately.
STEP 3 Wash the entire item in water with soap to remove all dirt and debris, even if not visible.
STEP 4 Soak in clean water with chlorine solution (0.05%–0.5%) for 30 minutes. Add sour (a
mild acid agent) to prevent yellowing of the textile.
STEP 5 Wash again with soap and water to remove bleach.
STEP 6 Check the item for cleanliness. Rewash if it is still dirty or stained.
STEP 7 Rinse the item with clean water.
(Sehulster, Chinn, Arduino, et al. 2015; SEARO/WHO 2004)

Machine Washing Textiles
Heavy-duty washers or dryers are recommended for larger healthcare facilities (e.g., hospitals). To
properly machine wash textiles:
STEP 1 Wear PPE while handling and loading machines.
STEP 2 Separate heavily soiled textiles from non-soiled textiles and wash separately.
STEP 3 Follow the manufacturer’s instructions to adjust the temperature settings, cycle time,
type of soap, and other washing agents to be added.
STEP 4 For hot-water washing at 70–80o
C (158–176o
F), use soap for ≥ 25 minutes to aid in
loosening soil. Add bleach and souring agent if stain removal is required. If not using
hot water, soak the textiles in 0.05%–0.5% chlorine solution for 15–30 minutes and
then wash with soap and water to remove the bleach.
STEP 5 When the wash cycle is complete, check the item for cleanliness. Rewash if it is dirty
or stained. (Heavily soiled textiles may require two wash cycles.)
(CDC 2011; SEARO/WHO 2004)
When using a machine for washing textile:
• Do not overload the machine.
• A prewash rinse cycle of 15 minutes will remove remaining gross spillage.
• In cold water washes, chemicals, such as bleach, must be added (2 ml of household
bleach for every liter of water) with detergent to facilitate disinfection.
• During the rinse cycle, souring agent should be added to the rinse cycle to reduce
alkalinity and prevent yellowing. This decreases the likelihood of skin irritation and
further reduces the number of bacteria present.
• Air dry or machine dry before further processing. Textiles should be dried as
soon as possible after washing to prevent the regrowth of any bacteria not killed by the
washing procedure.
Please note that: Lower temperature or cold water washing are satisfactory if the cleaning
products (type of soap or detergent, amount of bleach and other additive) are appropriate and
used in proper concentrations. Using cold water also saves energy.
Drying, Inspecting, and Folding Textiles
Steps to dry, inspect, and fold hand- and machine-washed textiles:
STEP 1 Completely air or machine-dry cleaned textiles before further processing. A cycle in
the dryer has been associated with elimination of pathogenic bacteria. For air-drying,
direct sunlight is preferred. Keep the fabric off the ground, away from dust and
moisture.

STEP 2 After textiles are totally dry, check for holes and threadbare (worn) areas. If these are
present, the item must be discarded or repaired before reuse or storage.
For holes, punctures, or tears or large areas to be repaired, the item should be patched
with the same quality material by stitching or heat sealing; otherwise, the item should
not be used for direct patient care or surgical procedures. Worn textiles can be cut into
pieces and used as cleaning cloths.
For surgical drapes, the percentage of exposed surface allowed to be patched depends
on the sterilization method used to process the item and the number of layers of fabric
from which the drape is made. For example, a drape should have no more than five
patches per area 30 centimeters (12 inches) square, or no more than 20% of the drape
covered with patches. Patches should be avoided, if possible, because they increase the
thickness of the item and decrease steam penetrability when sterilization is required.
STEP 3 Air-dried textiles should be ironed. Ironing has been associated with the elimination of
pathogenic bacteria and is essential to prevent parasites in some regions.
STEP 4 Clean, dry textiles should be folded. If sterile textiles are required (e.g., in the operating
theater), prepare and sterilize wrapped packs. In neonatal ICUs, hygienically laundered
textiles can be safely used; it is not necessary to use sterilized textiles (AORN 2012;
Bearman, Bryant, Leekha, et al. 2014; Sehulster, Chinn, Arduino, et al. 2015;
SEARO/WHO 2004; Tietjen, Bossemeyer, McIntosh 2003).
Storing, Transporting, and Distributing Hygienically Clean Textiles
Storing Hygienically Clean Textiles
Procedures for proper storing of hygienically clean textiles:
• Store clean textiles in clean, closed storage areas.
• Store clean textiles in an area free of pests, dust, and lint and at room temperatures of
20–25.6 °C (68–78 °F).
• Use physical barriers to separate folding and storage rooms from soiled areas.
• Ensure that storage shelves are 2.5 to 5 cm (1 to 2 inches) from the wall.
• Bottom shelf: 15 to 20 cm (6 to 8 inches) from the floor
• Top shelf: 30 to 45 cm (12 to 18 inches) below the ceiling
• Keep shelves clean and textiles covered, which can be achieved by covering clean
textiles on a clean cart.
• Wrap bundles of clean textiles in plastic or other suitable material and close securely.
• Restrict access to the laundry storage room to authorized staff.
• Store hygienically clean surgical attire as close to the point of use as possible to avoid
any microbial contamination.

• Handle stored textiles as little as possible.
(APIC 2014; Sehulster, Chinn, Arduino, et al. 2015)
Transporting Clean Textiles
Procedures for proper transporting of clean textiles:
• Hygienically clean and soiled textiles should be transported separately. If separate
trolleys or containers are used for clean and soiled textiles, they should be labeled
accordingly.
• If clean and soiled textiles must be transported in the same cart, the following are
options in order of preference:
o Thoroughly clean the containers and trolley with disinfectant cleaning solution (e.g.,
0.5% hypochlorite solution) before transporting hygienically clean textiles.
o Keep hygienically clean textiles in separate areas of the same trolley where soiled
textiles are located and cover both.
o Wrap or cover hygienically clean textiles during transport to avoid contamination.
Distributing Hygienically Clean Textiles
It is important to protect hygienically clean textiles from environmental contaminants (e.g., dust
and dirt) until they are distributed for use. Outbreaks associated with textiles have resulted from
contamination of clean textiles; several outbreaks of Bacillus cereus in hospital settings were linked
to contaminated textiles (Balm, Jureen, Teo, et al. 2012; Duffy, Harris, Gade, et al. 2014; Hosein,
Hoffman, Ellam, et al. 2013).
To avoid contamination of textiles in healthcare facilities:
• Do not leave extra textiles in patients’ rooms.
• Handle clean textiles as little as possible.
• Avoid shaking clean textiles where dust and lint can be released into the room.
• Do not conduct routine microbiologic sampling of clean textiles.
• Clean soiled mattresses and pillows using the following guidelines before putting clean
textiles on them:
o Clean plastic-covered mattresses and pillows by wiping them down with detergent.
Mattresses without plastic covers that have any blood or body fluids should have the
stains removed by either steam cleaning or manual washing. HCWs should wear
PPE during this cleaning process (Sehulster, Chinn, Arduino, et al. 2015;
SEARO/WHO 2004).

Key Notes:
• Do not presort or wash textiles at the point of use.
• Workers should not carry wet and soiled textiles close to their bodies even though they
are wearing a plastic or rubber apron.
• Presoaking in soap, water, and bleach is necessary only for heavily soiled textiles.
• Ironing, especially using a steam iron, will destroy pathogens.
• Handle stored textiles as little as possible.
• Sterilization is the preferred end process for surgical gowns, textile drapes, and
wrappers.
SUMMARY
Facility staff are often responsible for handling and processing reusable textiles at the facility.
Although soiled textiles may contain large numbers of microorganisms, the overall risk of disease
transmission is low if textiles are handled, transported, and laundered in a manner that avoids the
transfer of microorganisms to patients, HCWs, and the environment. Healthcare-related outbreaks
can occur because of contaminated textiles and HCWs can experience injuries and exposure if these
recommendations are not followed. Guidelines for processing textiles and PPE are provided in table
8.2.

Table 8.2. Guidelines for processing textiles and PPE
Source: Tietjen et al., 2003

BIBLIOGRAPHY
CHAPTER 8: PROCESSING REUSABLE TEXTILES AND LAUNDRY SERVICES
Association for Professionals in Infection Control and Epidemiology (APIC). 2014. Laundry, patient linens,
textiles and uniforms (Chapter 111). In APIC text of infection control and epidemiology, 4th ed.
Washington, DC: APIC.
Association of periOperative Registered Nurses (AORN). 2012. Recommended practices for sterile
technique. In Perioperative standards and recommended practices: For inpatient and ambulatory settings.
Denver, CO: AORN.
Association of periOperative Registered Nurses (AORN). 1999. Recommended practices for sterilization in
perioperative practice settings. AORN Journal, 70(2), 283–293. https://doi.org/10.1016/s0001-
2092(06)62242-4
Balm, MN, Jureen, R, Teo, C, et al. 2012. Hot and steamy: Outbreak of Bacillus cereus in Singapore
associated with construction work and laundry practices. The Journal of Hospital Infection, 81(4):224–230.
Bearman, G, Bryant, K. Leekha, S, et al. 2014. Healthcare personnel attire in non-operating-room settings.
Centers for Disease Control and Prevention (CDC). 2011. Basic infection control and prevention plan for
outpatient oncology settings. https://www.cdc.gov/hai/settings/outpatient/basic-infection-control-prevention-
plan-2011/index.
Duffy, J, Harris, J, Gade, L, et al. 2014. Mucormycosis outbreak associated with hospital linens. The
Pediatric Infectious Disease Journal, 33(5):472–476. https://pubmed.ncbi.nlm.nih.gov/24667485/.
Fijan, S, Turk, SS. 2012. Hospital textiles, are they a possible vehicle for healthcare-associated infections?
International Journal of Environmental Research and Public Health, 9(9):3330–3343.
Healthcare Laundry Accreditation Council (HLAC). 2016. Accreditation standards for processing reusable
textiles for use in healthcare facilities.
https://www.hlacnet.org/_files/ugd/076879_f1469c4510464048999c64c1149c6799.pdf.
Hosein, IK, Hoffman, PN, Ellam, S, et al. 2013. Summertime Bacillus cereus colonization of hospital
newborns traced to contaminated, laundered linen. The Journal of Hospital Infection, 85(2):149–154.
McDonald, LL. 2002. Textile services. In APIC text of infection control and epidemiology. Washington DC:
APIC.
Occupational Safety & Health Administration (OSHA), United States Department of Labor. n.d. Laundry.
https://www.osha.gov/SLTC/etools/hospital/laundry/laundry.html#ContaminatedLaundry.
Sehulster L,M, Chinn, RY, Arduino, MJ, et al. 2004 (Last update: 2015). Environmental infection control
guidelines. Chicago, IL: American Society for Healthcare Engineering/American Hospital Association.
https://www.cdc.gov/infectioncontrol/guidelines/environmental/background/laundry.html.
South East Asia Regional Office (SEARO), World Health Organization (WHO). 2004. Practical guidelines
for infection control in healthcare facilities. New Delhi, India: SEARO. http://www.mtpinnacle.com/pdfs/who-
practical-guide-infection-cont.pdf.

Chapter 9: Environmental Cleaning in Healthcare Setting 200
CHAPTER 9: ENVIRONMENTAL CLEANING IN HEALTHCARE
SETTING
Key Topics
• General principles of cleaning
• Ways of preparing disinfectant cleaning solutions
• When and how to clean low and high-risk areas
• Cleaning spills of blood or other body fluids
• Cleaning the housekeeping equipment
BACKGROUND
The accumulation of dust, soil, and microbial contaminants on environmental surfaces is both
unsightly and a potential source of HAIs. Effective and efficient cleaning methods and schedules
are, therefore, necessary to maintain a clean and healthy environment in healthcare settings (Chou
2002).
Housekeeping practices in healthcare facilities address the general cleaning of health facilities,
including the compound, the floors, walls, various types of equipment, tables, and other surfaces.
Housekeeping activities are not expensive or technology intensive in most cases. The purpose of
general housekeeping is to:
• Reduce the number of microorganisms that may encounter patients, visitors, staff, and
the community.
• Provide a clean and pleasant atmosphere for patients and staff.
Most areas in health facilities, such as waiting rooms and administrative offices, are normally of
low risk because they can be cleaned using only soap and water. In high-risk areas, where heavy
contamination is expected, sources of contaminations, such as toilets and latrines, and blood or body
fluid spills, can be handled by such disinfectants as 0.5% chlorine or 1% phenol, which should be
added to the cleaning solution (SEARO 1988). Using a disinfectant in addition to soap and water is
also recommended in other high-risk areas, such as operating rooms, pre- and postoperative
recovery areas, dressing areas, and ICUs.
Patient rooms, especially those items that might be touched with bare hands by patients and staff,
should be cleaned using a disinfectant solution to minimize the risk of infection. A study in this area
(McFarland, et al. 1989) found that when patients who did not have Clostridium difficile were
admitted to a room previously occupied by a patient with these bacteria, the risk of infection from
the bacteria for these new patients was known to increase many fold, even in the context of the
correct use of precautions to prevent cross contamination.
If the purpose of housekeeping, as stated above, is to be achieved, it is important that housekeeping
staff be trained to perform their assigned tasks and are supervised on a regular basis. As part of their
training, it is important that the housekeeping staff:

• Understand the risk of exposure to contaminated items and surfaces when performing
environmental cleaning procedures.
• Follow recommended policies and guidelines, including the use of appropriate PPE.
General Principles for Cleaning
• Scrubbing (frictional cleaning) is the best way to physically remove dirt, debris,
and microorganisms.
• Cleaning is required before any disinfection process because dirt, debris, and
other materials can decrease the effectiveness of many chemical disinfectants.
• Cleaning products should be selected based on their use, efficacy, safety, and cost.
• Cleaning should always progress from the least soiled areas to the most soiled areas, and
from high to low areas so that the dirtiest areas and debris falling on the floor will be
cleaned up last.
• Dry sweeping, mopping, and dusting should be avoided to prevent dust, debris, and
microorganisms from getting into the air and landing on clean surfaces. Airborne fungal
spores are especially important because they can cause fatal infections in immune-
suppressed patients.
• Instructions for mixing (dilution) should be strictly followed when using disinfectants.
(Too much or too little water may reduce the effectiveness of disinfectants.)
• Cleaning methods and written cleaning schedules should be based on the type of
surface, the amount and the extent of the soil present, and the purpose of the area.
• Routine cleaning is necessary to maintain the standards of cleanliness. Also, schedules
and procedures should be consistent and posted.
How to Select Cleaning Products
There are different types of cleaning products that are used for different purposes. The
housekeeping staff, in particular, and health facility staff, in general, have to get a clear idea on
how to select a cleaning product and for what purpose. There are some basic facts that should be
remembered before selecting products. An ideal cleaning product should accomplish the following:
• Suspending fats in water (suspended fat in water).
• Saponification of fat (make fats water-soluble)
• Surfaction (decreasing surface tension of water and allowing greater penetration of
the agent into the dirt or soil).
• Dispersion (break up of soil into small particles).
• Protein destruction (break up proteins).
• Softening the water by removing calcium and magnesium from it.

The Main Guiding Principles for Resource Limited Areas
• Unnecessarily expensive products should not be selected.
• What is selected and bought should be based on evidence (not be left to chance).
• The right product should be for the right purpose.
In conclusion, it is believed that the selection of disinfectants and other cleaning products should
be based on the following factors:
• Intended use of the product/s
• Efficacy of the product/s
• Acceptability of the product/s
• Environment friendly
• Safety of the product/s
• Cost-effectiveness of the product/s
Personal Protective Equipment for Housekeeping
The housekeeping staff in health facilities deal with dirt, soils, and other materials that expose them
to risks of infections and other health hazards. To avoid hazardous exposure, they must be equipped
with the relevant PPE.
Some of PPE for housekeeping purposes are:
• Gloves, preferably utility or heavy-duty gloves
• Protective shoes
• Plastic or rubber apron
• Masks
• Protective eye wears
• Housekeeping staff should use the above-mentioned PPEs for:
o Handling disinfectant cleaning solutions
o Cleaning patient care areas
o Cleaning heavily contaminated areas
o Handling soiled linens
o Handling soiled items and instruments
o Handling or disposing of waste
o When spills or splashes are expected

How to Prepare a Disinfectant Solution
Disinfectants
Disinfectants are only for disinfecting after cleaning and are not substitutes for cleaning unless they
are a combined detergent-disinfectant product. Before disinfecting, use a cleaning product to
remove all organic material and soil. Low-level disinfection is generally adequate for environmental
cleaning procedures, but there are specific cases where intermediate-level disinfection with
sporicidal properties (e.g., C. difficile) is required.
Combined detergent-disinfectants
Combined (one-step) detergent-disinfectant products can generally be used in place of a two-step
(separate detergent and disinfectant product) process when disinfection is indicated for specific
environmental cleaning procedures.
The disinfectant cleaning solutions contain both disinfectants for decontamination and detergents
(soap) for cleaning. When we use chlorine solution, we should be cautious. Although chlorine-
containing solutions (sodium hypochlorite) are excellent and inexpensive disinfectants, they should
not be mixed with cleaning solutions containing an acid (e.g., phosphoric acid) like ammonia or
ammonium chloride. Doing so will release chlorine gas and other by-products that can result in
temporary illness (nausea, tearing, headache, or shortness of breath) of the staff inhaling fumes in
a poorly ventilated area (CDC 1991). To find out if a cleaning solution contains ammonia,
first check the label. If it is not mentioned among the ingredients, you may still be able to detect
ammonia when opening the product by its pungent and burning smell. If one is exposed to chlorine
gas or ammonium chloride or other unpleasant (noxious) gases with strong odors, the subject should
immediately leave the room or the area until it becomes completely ventilated.
STEP 1 Prepare a 0.5% chlorine solution from liquid concentrates or from chlorine powder
compounds (Equation 9.0-1). Alternative disinfectants that can be used are 1% to 2%
phenols or 5% carbolic acid.
STEP 2 Add enough detergent to the 0.5% chlorine solution or another disinfectant to make a
mild and soapy cleaning solution.
How to Prepare Chlorine Solution
Formula for making a dilute solution from a concentrated solution
• Check concentration (% concentrate) of the chlorine solution.
• Determine total parts of water using the formula in Equation 9.0-1.
• Mix one part concentrated bleach with the total parts water required.

Equation 9.0-1. Formula for making a dilute solution from a concentrated solution
𝑇𝑜𝑡𝑎𝑙 𝑃𝑎𝑟𝑡𝑠 (𝑇𝑃)𝑜𝑓 𝑤𝑎𝑡𝑒𝑟 = ⌈
% 𝐶𝑜𝑛𝑐𝑒𝑛𝑡𝑟𝑎𝑡𝑒
% 𝐷𝑖𝑙𝑢𝑡𝑒
⌉ − 1
Example: Make a dilute solution (0.5%) from 5% concentrated solution
STEP 1: Calculate totals parts water
𝑇𝑜𝑡𝑎𝑙 𝑃𝑎𝑟𝑡𝑠 (𝑇𝑃)𝑜𝑓 𝑤𝑎𝑡𝑒𝑟 = ⌈
5 %
0.5 %
⌉ − 1
= 9
STEP 2: Take one-part concentrated solution and add to nine parts of water.
Formula for making a dilute solution from a dry powder
• Check concentration (% concentrate) of the powder you are using.
• Determine the amount of chlorine (gm) to be add in a liter of water using the formula
below.
• Mix the calculated amount of dry powdered with one liter of water.
Equation 9.0-2: Formula for making a dilute solution from a dry powder
𝐺𝑚/𝐿𝑖𝑡 = ⌈
% 𝐷𝑖𝑙𝑢𝑡𝑒
% 𝐶𝑜𝑛𝑐𝑒𝑛𝑡𝑟𝑎𝑡𝑒
⌉ ∗ 1000
Example: Make a dilute chlorine solution (0.5%) from a concentrated powder (35%)
STEP 1: Calculate grams/liter:
𝐺𝑚/𝐿𝑖𝑡 = ⌈
0.5 %
35 %
⌉ ∗ 1,000
= 14.2 𝑔𝑚/𝑙𝑖𝑡
STEP 2: Add 14.2 grams to 1 liter of water

Cleaning Methods
Cleaning should start with the least soiled area and extend to the most soiled area and from high
to low surfaces. Common methods of cleaning are briefly described.
Figure 9.1: Frequently touched surfaces at health facilities (Examination room)
Source: Curless et al. 2018
Wet Mopping Method (Preferable for Floor Cleaning)
Double-bucket technique: Two different buckets are used here, one containing a cleaning solution
and the other containing water for rinsing. The mop is always rinsed and wrung out before it is
dipped into the cleaning solution. The double-bucket technique extends the life of the cleaning
solution (fewer changes are required), saving both labor and material costs.
Triple-bucket technique: The third bucket is used for wringing out the mop before rinsing, which
extends the life of the rinse water.
Flooding Followed by Wet Vacuuming Method
• It is preferable for surgical suits.
• It eliminates mopping and minimizes the spread of microorganisms.
• It increases the contact time of the disinfectant and the area to be cleaned.
• Preferably, it should be done at night when the traffic flow of the facility is low.

Wet Dusting
• Should be used for cleaning walls, ceilings, doors, windows, furniture, and other
environmental surfaces.
• Clean clothes or mops are made wet with cleaning solution contained in a basin
or bucket. The double-bucket system minimizes the contamination of the cleaning
solution.
• Dry dusting should be avoided, and dust cloths should not be shaken for fear of
spreading microorganisms.
• Should be performed in a systematic way using a starting point as a reference to ensure
that all surfaces have been reached.
• Check for a stain that may indicate possible leaks when doing high dusting (ceiling
tiles and walls). Leaking holes or cracks should be repaired as soon as possible because
moist structure provides a reservoir for fungal growth.
Dry Vacuuming
• This is recommended only for cleaning carpets.
Risk-Based Environmental Cleaning Frequency Principles
Probability of contamination: Heavily contaminated surfaces and items require more frequent and
thorough environmental cleaning than moderately contaminated surfaces, which in turn require
more frequent and rigorous environmental cleaning than lightly or non-contaminated surfaces and
items.
Vulnerability of patients to infection: Surfaces and items in care areas containing vulnerable patients
(e.g., immunosuppressed) require more frequent and rigorous environmental cleaning than surface
and items in areas with less vulnerable patients.
Potential for exposure to pathogens: High-touch surfaces (e.g., bed rails) require more frequent and
rigorous environmental cleaning than low-touch surfaces (e.g., walls). Every facility should develop
cleaning schedules, including:
• Identifying the person responsible
• The frequency
• The method (product, process)
• Detailed SOPs for environmental cleaning of surfaces and noncritical equipment in
every type of patient care area (CDC 2021).
Risk based area categorization & cleaning schedule: In health facilities, housekeeping activities
should be scheduled. The housekeeping schedule should be planned, written, and closely followed.
Cleaning schedules should be developed according to the need of each area.

Walls, windows, ceilings, and doors, including door handles: These areas should be cleaned
when visibly dirty with a damp cloth, detergent, and water. In general, routine damp dusting is
adequate for these areas (disinfection is unnecessary). These surfaces are seldom heavily
contaminated with microorganisms as long as the surfaces remain dry and intact (Russell, Hugo,
Ayliffe 1982).
Chairs, lamps, tables, tabletops, beds, handrails, grab bars, lights, tops of doors, and counters:
These items should be wiped daily, and whenever visibly soiled, with a damp cloth containing
disinfectant cleaning solution. A disinfectant should be used when contamination from blood or
other body fluid spills are present.
Non-critical equipment (e.g., stethoscopes and blood pressure cuffs): These items can be wiped
daily, and whenever visibly soiled, with a damp cloth with detergent and water. However, if the
equipment is visibly soiled with blood or other body fluids, or when the patient is under contact
precautions, it should be cleaned and disinfected before it is reused.
Floors are usually cleaned (daily and as needed) with a wet mop, detergent, and water. A
disinfectant should be used during an actual or potential contamination from such sources as
blood or other body fluid spills, as described below.
Sinks are scrubbed frequently (daily or more often, as needed) with a separate mop, cloth, or brush
using a disinfectant cleaning solution. Following this, it needs to be rinsed with water.
Toilets and latrines are scrubbed frequently (daily and more often, as needed) with a separate mop,
cloth, or brush and a disinfectant cleaning solution.
Patient rooms should be cleaned daily and right after a patient is discharged, using the processes
described above. The same cleaning process applies to rooms of patients who are under
isolation precautions. Any cleaning equipment used in the rooms of patients under isolation
precautions should be cleaned and disinfected before being used in another room.
Procedure rooms: Wipe horizontal surfaces, equipment, and furniture used for procedures with a
disinfectant cleaning solution after each procedure and whenever visibly soiled. Clean blood or
other body fluid spills, as described below.
Examination rooms: Wipe horizontal surfaces with a disinfectant cleaning solution whenever
visibly soiled. Linen or paper on the examination table should be changed and laid out for each
patient. Clean blood or other body fluid spills, as described below.
Laboratory: Wipe countertops with a disinfectant cleaning solution after each shift and whenever
visibly soiled. Clean blood or other body fluid spills, as described below.
Curtains: Change and clean curtains according to the routine schedule and when visibly soiled.
Carpets: Vacuum carpets daily in patient rooms or weekly in offices or conference rooms.
Soiled linen: Collect soiled linen daily (or more often, as needed); put them in closed and leak-
proof containers.

Waste: Collect waste from all areas at least daily (or more frequently, as needed) and avoid
overflowing.
Waste containers: Clean contaminated waste containers each time following emptying. Clean
non-contaminated waste containers when visibly soiled and at least once a week. Use a disinfectant
cleaning solution and scrub to remove soil and organic material.
Schedule and Procedures for the Operating Room
• At the beginning of each day, all flat (horizontal) surfaces (table, chairs, etc.) should
be wiped with a clean, lint-free, and moist cloth to remove dust and lint that may have
collected overnight.
• Total cleaning is not necessary between each case for surgical procedures.
• Total cleaning or terminal cleaning (mopping floors and scrubbing all surfaces from
top to bottom) of the operating room should be done at the end of each day.
Note: Do not dry mop or sweep the operating room. (This causes dust, debris, and microorganisms to
become airborne and contaminate clean surfaces.)
Total Cleaning
STEP 1 Remove covered contaminated waste container and replace it with a clean container.
Arrange for burning (incineration) or burial as soon as possible.
STEP 2 Close and remove sharps containers when three-quarters full.
STEP 3 Remove soiled linen in closed leak-proof containers.
STEP 4 Soak a cloth in disinfectant cleaning solution and wipe down all surfaces, including
counters, tabletops, sinks, lights, etc. Wash from top to bottom so that any debris that
falls on the floor will be cleaned up last.
Note: All areas of the surgical suite, scrub sinks, scrub or utility areas, hallways, and equipment should be
totally cleaned regardless of their being used during the 24-hour surgery period.
Walls and ceilings: Wipe them with a damp cloth with detergent and water as needed for visible
soil.
Note: If walls and ceilings are deteriorating or damp, cover them up with clean plastic sheets during
procedures.
Chairs, lamps, sink tabletops, and counters: Wipe them with a damp cloth with disinfectant
cleaning solution.
Operating room lamps: Wipe them with a damp cloth with disinfectant cleaning solution.

Note: The double- or triple-bucket method is recommended for cleaning the operating room and other
areas of the surgical suite.
Operating room table: Wipe it with a 0.5% chlorine solution (or other approved disinfectant) to
decontaminate. Then clean the top, sides, base, legs, and any accessories (e.g., leg stirrups) with a
damp cloth and disinfectant cleaning solution.
Floors: Clean with a wet mop using a disinfectant cleaning solution.
Vents (heating or air conditioning): Wipe them with a damp cloth with soap and water.
Spills: Clean spills with a 0.5% chlorine solution or other locally available and approved
disinfectants (see below).
Operating room bed: Wipe all surfaces and mattress pads with a disinfectant cleaning solution.
Instrument tables (trolley and mayo stand) and other flat surfaces: Wipe all flat surfaces
that have come into immediate contact with a patient or body fluids with a disinfectant cleaning
solution.
Center of operating room surrounding the operating room bed: Mop it with a disinfectant
cleaning solution (if visibly soiled).
Waste: Collect and remove all waste from the operating room in closed leak-proof containers.
Sharps containers: Close and remove containers from the operating room when they are three-
quarters full.
Soiled linen: Remove soiled linen in leak-proof covered waste containers.
Note:
• Cleaning the filters in air conditioners regularly will help them run more efficiently and decrease the
growth of molds.
• Because all patients are considered potentially susceptible and at times infectious, standard
precautions are to be used and no additional measures are necessary even if a client is known to
have an infection.
How to Clean Spills of Blood and Other Body Fluids
Regardless of the risk-level of an area, spills or contamination from blood or body fluid (e.g.,
vomitus), must be cleaned and disinfected immediately using a two-step process (clean and
disinfect). Do not use combined detergent-disinfectant product; use intermediate-level disinfectant.
This is the general process for cleaning of spills of blood or body fluids:
1. Wear appropriate PPE.
2. Confine the spill and wipe it up immediately with absorbent (paper) towels, cloths, or
absorbent granules (if available) that are spread over the spill to solidify the blood or body
fluid (all should then be disposed as infectious waste).

3. Clean thoroughly using neutral detergent and warm water solution.
4. Disinfect by using a facility-approved intermediate-level disinfectant.
5. Immediately send all reusable supplies and equipment (e.g., cleaning cloths, mops) for
reprocessing (i.e., cleaning and disinfection) after the spill is cleaned up (CDC 2021).
How to Manage Spills of Mercury from Broken Thermometer and Blood Pressure
Equipment:
• Put examination gloves on both hands.
• Collect all droplets of mercury with a spoon.
• Place in a small, closed container for disposal (possibly encapsulation and burial of the
waste away from water resource area) or reuse.
• Wash or clean the area with a chlorine solution.
• Remove used gloves carefully and wash hands properly.
How to Clean Soiled and Contaminated Cleaning Equipment
STEP 1 Decontaminate cleaning equipment that has been contaminated with blood or body
fluids by soaking it for 10 minutes in a 0.5% chlorine solution or other locally approved
and available disinfectants.
STEP 2 Wash cleaning buckets, cloths, brushes, mops, and the like with detergent and water
daily or right away if visibly dirty.
STEP 3 Rinse them in clean water.
STEP 4 Dry them completely before reuse. (Wet clothes and mop heads are heavily
contaminated with microorganisms.)
SUMMARY
• Housekeeping practices in the healthcare facilities include the compound, the floors,
walls, various type of equipment, tables, and other surfaces.
• Dust, soil, and microbial contaminants on environmental surfaces are potential source of
HAIs.
• Effective and efficient cleaning methods and schedules are necessary to maintain a clean
and healthy environment in healthcare settings.
• Cleaning should start with the least soiled area and extend to the most soiled area, and
from high to low surfaces.
• It is important that housekeeping staff be trained to perform their assigned tasks and are
supervised on a regular basis.

• Total cleaning or terminal cleaning (mopping floors and scrubbing all surfaces from top
to bottom) of the operating room should be done at the end of each day.
• Do not dry mop or sweep the operating room.
BIBLIOGRAPHY
CHAPTER 9: ENVIRONMENTAL CLEANING IN HEALTHCARE SETTING
Association of Operating Room Nurses (AORN). 1992. Recommended practices: Disinfection.
AORN Journal, 56(4): 715-720. https://pubmed.ncbi.nlm.nih.gov/1416927/
Belkin, NL. 1994. Gowns: selection on a procedure-driven basis. Infection Control and Hospital
Epidemiology, 15(11), 713-716. https://pubmed.ncbi.nlm.nih.gov/7852728/
Centers for Disease Control and Prevention (CDC). 1991. Chlorine gas toxicity from mixture of bleach with
other cleaning products--California. MMWR. Morbidity and Mortality Weekly Report, 40(36), 619–629.
CDC. Last updated 2021. Environmental cleaning procedures. https://www.cdc.gov/hai/prevent/resource-
limited/cleaning-procedures.html#
CDC and ICAN. 2019. Best practices for environmental cleaning in healthcare facilities in resource-limited
settings. Atlanta, GA: US Department of Health and Human Services, CDC; Cape Town, South Africa:
Infection Control Africa Network. https://www.cdc.gov/hai/prevent/resource-limited/index.html.
Chou, T. 2002. Environmental services. In: APIC text of infection control and epidemiology. Washington,
DC: APIC.
Curless, MS, Givan, M, & Trexler, PA. 2018. Infection prevention and control. Module 5. Facility
management. Baltimore, MD: Jhpiego Corporation. https://www.jhpiego.org/wp-
content/uploads/2020/03/IPC_M5_FacilityManagement.pdf
Fraise, AP, Lambert, PA, & Maillard, JY. (Eds.) 2008. Russell, Hugo and Ayliffe's principles and practice of
disinfection, preservation and sterilization: Fourth Edition. Hoboken, NJ: Wiley-Blackwell.
Klevens RM, Edwards JR, Richards CL Jr, Horan TC, Gaynes RP, Pollock DA, Cardo DM. 2007.
Estimating health care-associated infections and deaths in U.S. hospitals, 2002. Public Health Reports,
122(2):160-6. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1820440/
McFarland, LV, Mulligan, ME, Kwok, RY, Stamm, WE. 1989. Nosocomial acquisition of Clostridium difficile
infection. The New England Journal of Medicine, 320(4), 204–210.
Spaulding, EH. 1968. Chemical disinfection of medical and surgical materials. In Lawrence, C, Block, SS,
eds. Disinfection, sterilization, and preservation. Philadelphia, PA: Lea & Febiger.

Chapter 10: Healthcare Waste Management 212
CHAPTER 10: HEALTHCARE WASTE MANAGEMENT
Key Topics
• Categories of healthcare waste
• Reduction of healthcare waste
• Segregation of waste at point of generation
• Management of the healthcare waste process
• Waste treatment and disposal methods
BACKGROUND
Healthcare waste, produced in the course of delivering healthcare, is potentially hazardous, and
effective management is critical to IPC in healthcare. A healthcare facility is responsible for
managing public health and protecting the environment with regard to the waste produced.
However, the waste management process (generation, collection, transport, storage, and disposal)
entails considerable complexity, involving clinical and non-clinical staff across a facility, and often
depends on outside agencies.
Managing waste remains particularly challenging for facilities in limited-resource settings. Lack of
organization, financial resources, training, segregation, equipment, locations for storage, access to
PPE, municipal support, and safe disposal locations have been identified as among the challenges
(Awodele, Adewoye, Oparah 2016; Caniato, Tudor, Vaccari 2016). WHO (2017), in reporting a
WHO/UNICEF joint assessment, found that just over half (58%) of sampled facilities from 24
countries had adequate systems in place for the safe disposal of health-care waste. Public interest in
waste management practices of healthcare facilities and the impact on climate and the environment
continues to grow. Knowledge of the potential for harm from healthcare waste continues to be
relevant to governments and communities. (WHO 2014).
Risks from healthcare waste include exposure to pathogenic organisms, harmful chemicals, toxins,
or radioactive substances, and injury from sharp items. Anyone who comes into contact with waste,
both in the community and in the facility (HCWs, patients, visitors, laundry workers, cleaners,
porters, etc.) may be at risk. Exposure to toxic agents contained in healthcare waste can cause skin,
respiratory tract, and neurological conditions. Recommendations for reducing the risk from injury
and infection are described in this chapter.
Infectious healthcare waste includes waste that has the potential for causing infection. HCWs can
be infected when they are exposed to waste through a skin puncture, broken skin, splashes into the
mouth or eyes, inhalation, or ingestion. Infectious conditions potentially transmitted from healthcare
waste include gastrointestinal conditions (i.e., diarrhea and vomiting), respiratory conditions, skin
and eye infections, meningitis, bloodborne virus infections (e.g., HIV, HBV, and HCV), and
hemorrhagic fever, including EVD.
Standard precautions protect HCWs from the risks of handling infectious waste at each point
throughout the waste management process. All waste should be handled using Standard Precautions
and Transmission-Based Precautions, and waste that includes any items potentially contaminated
with blood and body fluids should be managed as infectious waste.

Applying IPC recommendations to all aspects of waste handling (generation, collection, transport,
storage, and disposal) minimizes the risks to human health and the environment.
Categories of Healthcare Waste
Categorizing the waste produced in healthcare facilities is a useful method to understand the
handling and disposal requirements for each type of waste.
Approximately 75%–90% of the general waste produced by healthcare facilities is non-
contaminated and poses no risk of infection to those who handle it. Similar in nature to municipal
waste, all or most general waste can be discarded in dumps or landfills or burned in incinerators
(WHO 2014).
Infectious waste from healthcare facilities must be handled and disposed of properly because it may
carry microorganisms that have the potential to infect individuals who come in contact with it.
There are other types of waste generated in healthcare facilities that do not contain infectious agents
but are considered hazardous because of the potential harm they can cause to the environment. Table
10.1 provides details on the various categories of waste generated by healthcare facilities, as defined
by WHO.
Table 10.1. Categories of waste generated by healthcare facilities
Waste category Descriptions and examples
Non-hazardous healthcare waste
General waste Waste that does not pose any particular biological, chemical, radioactive, or
physical hazard (e.g., paper boxes, newspapers, magazines, polyethylene
bottles, polyester bags, wood, other papers, metals [e.g., aluminum cans and
containers], high-density polyethylene [e.g., milk containers, saline bottles],
glass, and construction/demolition materials).
Hazardous healthcare waste
Sharps waste Used or unused sharps (e.g., hypodermic, intravenous, or other needles, auto-
disable syringes, syringes with attached needles, infusion sets, scalpels,
pipettes, knives, blades, and broken glass).
Infectious waste Infectious waste is waste that is potentially contaminated with blood, body fluids,
or pathogenic organisms, including but not limited to laboratory cultures,
microbiological stocks, excreta, and items soiled with blood or body fluids.
Pathological waste Waste that contains human tissues or fluids, organs, body parts, fetuses, and
unused blood products.
Pharmaceutical
waste
Pharmaceuticals that are expired or no longer needed and items contaminated
by or containing pharmaceuticals.
Cytotoxic waste Cytotoxic waste contains by-products of drugs that kill dividing cells, which are
used for treatment of certain cancers. It also includes waste materials that can
damage human genes (e.g., DNA) and may cause cancers or congenital
deformities in babies. This waste can include sharps, PPE, and body fluid
exposed to the drugs.

Waste category Descriptions and examples
Chemical waste Waste containing chemical substances (e.g., laboratory reagents, film
developer); disinfectants that are expired or no longer needed; solvents; and
waste with a high content of heavy metals (e.g., batteries, broken thermometers,
and blood pressure gauges).
Radioactive waste Waste containing radioactive substances (e.g., unused liquids from radiotherapy
or laboratory research; contaminated glassware, packages, or absorbent paper;
urine and excreta from patients treated or tested with unsealed radionuclides;
and sealed sources—containers in which radioactive substances are stored and
sealed).
Adapted from: WHO 2014.
Sources of Healthcare Waste
The types and amount of healthcare waste generated in a healthcare facility depend on the size of
the facility and the range of services provided. The larger the facility (e.g., university hospital,
regional hospital) and the more services provided (e.g., tertiary healthcare facility with a trauma
center, cancer treatment department), the more waste is produced and the greater the variety of
waste generated. Table 10.2 provides examples of healthcare waste from different sources in
healthcare facilities.

Table 10.2. Healthcare waste from different sources in a healthcare facility
Location Sharps Infectious and
pathological waste
Chemical,
pharmaceutical, and
cytotoxic waste
Non-hazardous
or general waste
Major sources

pathological waste
Chemical,
pharmaceutical, and
cytotoxic waste
Non-hazardous
or general waste
Medical ward Hypodermic
needles, IV
set needles,
broken vials,
and ampoules
Dressings, bandages,
gauze, and cotton
contaminated with
blood or body fluids;
gloves and masks
contaminated with
blood or body fluids
Broken
thermometers, blood
pressure gauges,
spilled drugs, and
spent disinfectants
Packaging, food
scraps, paper,
flowers, empty
saline bottles, non-
bloody diapers,
non-bloody
intravenous tubing,
and bags
Operating
theater
Needles,
intravenous
sets, scalpels,
blades, and
saws
Blood and other body
fluids, suction canisters,
gowns, gloves, masks,
gauze, and other waste
contaminated with
blood and body fluids,
tissues, organs,
fetuses, body parts
Used disinfectants
and waste anesthetic
gases
Packaging,
uncontaminated
gowns, gloves,
masks, hats, and
shoe covers

pathological waste
Chemical,
pharmaceutical, and
cytotoxic waste
Non-hazardous
or general waste
Laboratory Needles,
broken glass,
petri dishes,
slides and
cover slips,
and broken
pipettes
Blood and body fluids,
microbiological cultures
and stocks, tissue,
infected animal
carcasses, tubes and
containers
contaminated with
blood or body fluids
Fixatives, formalin,
xylene, toluene,
methanol, methylene
chloride and other
solvents, and broken
lab thermometers
Packaging, paper,
and plastic
containers
Pharmacy
store
Expired drugs, spilled
drugs
Packaging
materials and
empty containers
Radiology Silver, fixing and
developing solutions,
acetic acid, and
glutaraldehyde
Packaging
materials
Chemotherapy Needles and
syringes
Bulk
chemotherapeutic
waste, vials, gloves,
and other material
contaminated with
cytotoxic agents, and
contaminated excreta
and urine
Packaging
materials
Vaccination
campaigns
Needles and
syringes
Bulk vaccine waste,
vials, and gloves
Packaging
materials
Environmental
services
Broken glass Disinfectants,
cleaners, spilled
mercury, and
pesticides
Packaging,
flowers,
newspapers,
magazines,
cardboard, plastic,
glass containers,
yard, and plant
waste
Engineering Cleaning solvents,
oils, lubricants,
thinners, asbestos,
broken mercury
devices, and
batteries
Packaging,
construction or
demolition waste,
wood, and metal
Food services Leftovers, food
scraps, plastic and
paper packaging,
and containers

pathological waste
Chemical,
pharmaceutical, and
cytotoxic waste
Non-hazardous
or general waste
Minor sources
Physician’s
office
(Outpatient
department)
Needles and
syringes,
broken
ampoules, and
vials
Cotton, gauze,
dressings, gloves,
masks, and other
materials contaminated
with blood and other
body fluids
Broken thermometers
and blood pressure
gauges, expired
drugs, and used
disinfectants
Packaging,
papers,
newspapers,
magazines,
uncontaminated
gloves, and masks
Source: WHO 2014
Management of Healthcare Waste
Reduction of Healthcare Waste
The preferred strategies for reducing healthcare waste are to minimize waste generation by
preventing waste production, reducing waste production, reusing and recycling waste, and
recovering useful substances from waste. The least preferable strategy is treating and disposing of
healthcare waste.
Healthcare facilities can take several steps to minimize waste, including monitoring the
consumption of hazardous substances and chemicals. Purchasing supplies with minimal packaging
and using reusable medical devices, where feasible, are other ways to minimize healthcare waste.
In addition, recycling waste when technologies are available will help minimize waste.
Chemical waste minimization options include:
• Using less toxic, environmentally friendly chemicals
• Using minimum concentrations when possible
• Ensuring good inventory control
• Designing proper storage areas
• Developing spill prevention and clean-up procedures (WHO 2014)
Segregation of Waste at Point of Generation
Although general waste is the least expensive and easiest to dispose of, infectious and hazardous
waste, which makes up 15% of waste, is more expensive and risky to handle. When general waste
is mixed with infectious or hazardous waste, the cross‐contamination is introduced and all the
resulting waste must be treated as infectious and hazardous.
Mixed waste occurs when wastes are not properly separated at the point of generation or are mixed
during any part of the waste management process. Segregation at the point of waste generation will
reduce the amount of waste that the facility must treat as infectious or hazardous and is a key strategy
for improving waste management at healthcare facilities.

Note: Training HCWs and having conveniently placed sharps containers close to where sharps are used
will help eliminate problems with improper disposal.
Use the following guidelines when disposing of infectious and general waste at the point of
generation in all types of healthcare facilities:
• The HCW who generates the waste should segregate it where it is generated (e.g., before
leaving a patient’s room, examination room, operating theater, or laboratory).
• The waste should be separated into the local or WHO categories (based on its potential
hazard and final disposal method).
• Separating wastes by hand after generation puts HCWs at risk and should not be
allowed.
• Deposit infectious waste in a labeled or color-coded, leak-proof, puncture-resistant
container.
• Use leak-proof (plastic or galvanized metal) containers with tight-fitting covers for
contaminated and hazardous wastes to protect patients and HCWs.
• Where available and feasible, use sturdy plastic bags/bin liners inside the waste
collection containers to assist with waste collection and transport. Do not reuse plastic
bags or bin liners.
• Use puncture-resistant sharps containers for all disposable sharps (e.g., sharps that will
not be reused).
Methods to encourage waste segregation include:
• Employ a “three-bin system” to segregate waste into separate bins for general, non-
hazardous wastes, infectious waste, and sharps.
• Use standardized, colored plastic bags (if available) or colored waste containers or
standardized, clearly labeled containers to alert HCWs to the contents of the containers.
• Place waste containers and sharps containers at or close to the point of waste generation
so that waste and sharps can be placed directly in the container.
Note: The sharps container should be placed at the point of use so that HCWs do not have to carry sharp
items.
• Use tools, such as a kidney dish or bowl, to separate waste and transport it safely from
the point of waste generation to waste containers when waste containers and sharps
containers cannot be placed close to the point of waste generation.
• Train HCWs on the importance, categories, and methods of waste segregation.
Note: It is important to train all HCWs, including clinicians and cleaning staff, and to educate patients to
keep infectious and non-infectious waste separate.
• Use workplace reminders (posters, signs) to remind staff how to segregate waste.

• Talk to HCWs in each area of the facility about the barriers to segregation in their
departments because they will vary widely according to the types of tasks performed and the
workflow. WHO’s recommendations for waste segregation are described in table 10.3.
Table 10.3. WHO’s recommendations for waste segregation
Type of waste Color of container and
markings
Type of container
Highly infectious waste Yellow, marked “highly
infectious” with biohazard
symbol
Strong, leak-proof plastic bag or
container capable of being
autoclaved
Other infectious waste (includes
all pathological waste)
Yellow with biohazard symbol Leak-proof plastic bag or
container
Sharps Yellow, marked “SHARPS” with
biohazard symbol
Puncture-proof container
Chemical and pharmaceutical
waste
Brown, labeled with appropriate
hazard symbol
Plastic bag or rigid container
Radioactive waste Labeled with radiation symbol Lead box
General healthcare waste Black Plastic bag or container
Source: WHO 2014
After segregation in patient care areas, separation during collection, transport, and storage of waste
must be maintained to obtain any benefit. All HCWs, including cleaners, porters, and those
collecting, transporting, storing, and disposing of the waste, must be educated about the importance
of segregation.
In addition, use symbols to indicate the different categories of infectious and hazardous waste
(figure 10.1).
Figure 10.1. Hazardous waste symbols for healthcare facilities
Biohazard Radiation Chemical Corrosive
Highly Flammable Chemical Toxic Chemical Explosive Chemical

Collection and Transportation of Waste in Healthcare Facilities
To manage waste in healthcare facilities and to ensure timely and safe disposal, waste collection
and transportation systems should be developed using the following criteria:
• Waste collection routes should be carefully planned and drawn out, taking into
consideration the principle of collecting from least to most infectious waste (e.g., the
laboratory would be last on a collection route).
Note: Waste bags and sharps containers should NOT be filled more than three-quarters full.
• Waste collection timetables for each route should be carefully planned according to the
waste generation patterns of the various departments. For example, operating theaters,
labor and delivery areas, laboratories, and outpatient clinics may generate more waste at
different times than other areas and require more frequent collection schedules.
Note:
• Never use hands to compress waste into containers.
• Hold plastic bags at the top.
• Keep bags from touching or brushing against the body while lifting or during transport.
• Collect waste on a regular basis, such as daily or sooner, if needed, according to the rate
it is generated and the size of the waste containers. Waste bags and sharps containers
should NOT be filled more than three-quarters full.
• Staff should be trained to understand the risks and safety procedures for handling waste:
o Do not mix infectious/hazardous and general waste during collection or transport.
o Collect and transport infectious waste to disposal sites in leak-proof, covered,
contaminated-waste containers.
o Do not use equipment (e.g., wheelbarrow, trolley/cart) that is used to hold and
transport waste for any other purpose in the healthcare facility.
o Use PPE when handling wastes.
Steps for the Collection and Transport of Solid Infectious Wastes
STEP 1 Wear heavy-duty or utility gloves and closed-toe shoes when handling and transporting
all waste.
STEP 2 Collect waste containers and transport to the storage area or treatment area for final
disposal.
STEP 3 Clean infectious-waste containers each time they are emptied using soap/detergent and
water, disinfect with a low- to intermediate-level disinfectant, and allow to dry before
reuse. Clean non-contaminated-waste containers at least once a week or when visibly
soiled.
STEP 4 Remove utility gloves and perform hand hygiene after handling wastes.

STEP 5 Wash and dry gloves (Volume 1, Chapter 9: Environmental Cleaning).
When using plastic bags/bin liners:
• Tie bags securely to provide a barrier between the waste and the HCW.
• Label bags with the date and type of waste in them.
• Do not shake or squeeze bags in an attempt to reduce volume when sealing them.
• Carry sealed bags at the top (i.e., by their necks) to the transportation trolley/cart/bin.
• Do not lift or hold bags by the bottoms or sides.
• Carry bags away from the body.
• Ensure that bags are not broken, opened, or dropped.
• Do not throw bags.
When bags/bin liners are not available:
• Use waste containers with lids.
• Clearly identify the containers by appropriate color/labeling, for example, “pathological
waste,” “infectious waste,” and “general municipal waste.”
(WHO 2014)
Steps for the Collection and Transport of Sharps Containers
STEP 1 Wear heavy-duty utility gloves and closed-toe shoes.
STEP 2 Pick up the sharps container from the clinical area. Ensure that the container is closed
tightly so that no sharps are spilled during transport.
STEP 3 Place the container in the designated part of the storage area when it is ready for
disposal.
STEP 4 Remove utility gloves and perform hand hygiene after handling waste.
STEP 5 Wash and dry gloves (Volume 1, Chapter 9: Environmental Cleaning).
Storage of Waste in Healthcare Facilities
Waste storage areas in the healthcare facility should be kept clean, organized, protected from pests
and the public (children or scavengers), and well-shaded to reduce heat buildup. Recommendations
for waste storage areas include:
• An easy-to-clean hard floor with good drainage
• Separate areas for infectious and general waste
• Separate cabinets to store pharmaceutical and other toxic wastes

• A good water supply with a sink for hand hygiene
• Regular cleaning
• Identification (signs) as a “waste storage area”
• Lockable door/gate
Disposal of Healthcare Waste
Recommended Waste Disposal Methods
Countries committed to minimizing the level of dangerous, cancer-causing chemicals (e.g., dioxin
and furans) in groundwater can adopt recommended approaches for waste treatment/dips. However,
meeting current guidelines may be challenging for facilities in resource-limited settings. Waste
minimization to limit the volume of hazardous waste produced and waste segregation to minimize
the proportion of the total waste that is infectious/hazardous are key waste management measures
in all settings. Choosing the best currently available waste disposal method and working toward
safer waste disposal to protect the community and the environment is essential. Table 10.4
summarizes options for waste treatment that healthcare facilities can choose, based on available
resources and the volume and types of waste generated. (WHO 2014).
Table 10.4. Methods for treating healthcare waste
Method Brief description
Non-burn methods
Non-infectious waste
Thermal processes Use of heat to destroy microorganisms in the waste
Chemical processes Disinfectants (e.g., chlorine dioxide, sodium hypochlorite, peracetic acid, lime
solution, ozone gas, dry inorganic compounds) used to treat waste
Irradiation technologies Irradiation from electron beams, cobalt-60, or ultraviolet sources to destroy
microorganisms
Biological processes Use of natural living organisms to degrade organic matter (e.g., composting of
kitchen wastes)
Mechanical processes Grinding, mixing, and compacting to reduce waste volume and to supplement
other healthcare waste processes (e.g., after waste disinfection)
Infectious waste
Autoclaving Use of high-pressure steam to kill microorganisms in infectious waste and
sterilize medical instruments
Integrated, steam-based
treatment
A continuous flow system that uses mechanical processes before, during,
and/or after steam-based processes (similar to autoclaving) that transfers heat
to the waste, making the waste unrecognizable
Microwave technologies Steam-based system that uses moist heat and steam generated by microwave
energy
Dry-heat treatment Dry-heat system that heats waste by conduction, natural or forced convection,
or thermal radiation
Chemical treatment Chemical disinfection for treating liquid waste (e.g., blood and body fluids); solid
waste should be shredded or mixed before it is chemically disinfected

Method Brief description
Burn technologies
Incineration High-temperature, dry oxidation (1,200 °C [2,192 °F]) process that reduces
organic and combustible waste to inorganic and incombustible material using
combustion, pyrolysis, or gasification
Other methods
Encapsulation Filling containers (e.g., high-density polyethylene or metallic drums) with three-
quarters waste and then one-quarter medium substance (e.g., plastic foam,
bituminous sand, cement mortar, or clay material) and sealing container to be
disposed of in landfill site
Inertization Mixing of waste (e.g., pharmaceutical and high-metal content ashes) with
cement and other substances before disposal to reduce the risk of toxic
substances leaching into surface and groundwater
Land disposal Removal of healthcare waste materials after minimization or treatment to land
sites (e.g., controlled landfills) for final disposal
Municipal and other external
disposal sites
Landfill or waste site operated in a controlled manner for municipal waste,
whether treated or untreated waste, based on municipal guidelines
Adapted from: WHO 2014
The following waste treatment methods are not recommended and should be avoided:
• Open piles of waste because they:
o Are a risk to those who scavenge and unknowingly reuse contaminated items.
o Allow people to accidentally step on sharp items and injure themselves.
o Produce foul odors.
o Attract insects and animals.
o Can scatter in the wind and rain.
• Open burning because:
o It is dangerous.
o Temperatures reached are not adequate to treat healthcare waste.
o It is unsightly.
o The smoke is a pollutant.
o The wind can scatter the waste.
Specific steps are required for disposing of different categories of waste. Infectious and hazardous
waste should be treated before final disposal. Figure 10.2 shows the acceptable methods of waste
disposal.

Figure 10.2. Practical classification of hospital wastes and methods of disposal
Source: WHO 2004

Disposal of Solid Infectious Waste
Solid infectious waste consists of those items defined in national guidelines. Items, such as surgical
specimens and those soaked with blood or body fluids, are included. The method of disposal for
these items depends on the type of material from which they are constructed. See the sections on
incineration, autoclaving, or burying in the section titled
Autoclaves
Autoclaves use low-heat, high-pressure steam to treat infectious wastes. They can treat a wide range
of healthcare wastes. They consist of a metal vessel designed to withstand high pressures, with a
sealed door and pipes and valves through which steam is brought in and removed (figure 10.3).
Removal of air from the vessel is essential to ensure the penetration of steam into the waste. Because
they must withstand repeated buildup and release of steam pressures, their construction materials,
engineering design, fabrication, accuracy of pressure and temperature sensors, and testing must
meet requirements to operate safely.
Autoclaves generate significantly fewer air pollutants than incinerators and other high-heat thermal
processes. However, waste must be properly segregated to prevent hazardous chemicals from being
autoclaved. Poorly segregated waste may emit low levels of alcohols, phenols, formaldehyde, and
other organic compounds in the air and pose health risks to the autoclave operators and waste
workers. Volatile and semi-volatile organic compounds, cytotoxic waste, mercury, other hazardous
chemical waste, and radioactive waste should not be treated in an autoclave. Odors can also be a
problem if ventilation is insufficient. The air that is removed must be treated to prevent the release
of pathogenic aerosols; this is usually done with a high-efficiency particulate air filter or steam.
Treated waste from an autoclave will retain its physical appearance; shredders (though prone to
breakdowns) may reduce the volume 60%–80%. Glass, plastic, and metal waste can be recycled
after it is sterilized.
The three common types of autoclaves are:
• Gravity-displacement autoclaves
• Prevacuum or high-vacuum autoclaves
• Pressure pulse autoclaves

Figure 10.3. Diagram of an autoclave
Source: United Nations Development Programme, Global Environment Facility n.d.
Incineration of Waste
Incinerators can range from extremely sophisticated, high-temperature models to basic units that
operate at much lower temperatures. Properly maintained and operated incinerators eliminate
microorganisms from waste and reduce the waste completely to ashes. When selecting an
incinerator, first analyze the needs of the healthcare facility and municipal or regional disposal
requirements. Factors to consider include infrastructure of the area, local resources to support
construction and operation, cost estimates, and environmental policies (PATH 2010).
This section focuses on the selection, operation, and management of small-scale incinerators.
Design and Types of Incinerators
When performed properly, incineration is efficient and affordable. Important factors in an
incinerator design with regard to oxygen supplies are:
• Air inlets must be the right size and in the correct location to allow for a good mixture of
air (oxygen) with the waste gases.
• The chimney diameter and length (minimum of 4 meters [13.1 feet]) must be carefully
designed (not too short and not too long) to control the air draft.
• The incinerator should be located away from objects, such as buildings and trees.
• Ashes and other residues that build up and block the free passage of air (oxygen) must
be removed routinely (PATH 2010).
Vacuum
Air
Filter
Pressure Gauge
Safety
Valve
Release
Valve
Jacket
Autoclave Chamber
Charging
Door
Steam
Steam
Trap
Steam
Trap
Drain
Thermocouple

There are four basic types of incinerators that are commonly used for treating waste:
• Double-chamber, high-temperature incinerators designed to burn infectious waste.
• Single-chamber, high-temperature incinerators that are less expensive and are used when
double-chamber incinerators are not affordable.
• Rotary kilns that operate at high temperatures and are used for destroying toxic, organic
constituents of hazardous waste and heat-resistant chemicals.
• Drum or brick (clay) incinerators that operate at lower temperatures and are less
effective but can be made locally out of readily available materials.
Note: Incinerators that meet specifications and are properly maintained and operated eliminate
microorganisms from waste and reduce the waste to ash.
Precautions
If resources are limited, the following precautions should be taken when considering incineration:
• Provide an effective system for waste reduction and segregation (separate by type of waste).
• Use an engineer-designed incinerator with sufficient residence time and temperatures to
minimize incomplete combustion of products and premature failures.
• Place incinerators away from healthcare buildings, residential areas, or where food is grown.
• Describe methods of operation clearly to achieve the desired combustion conditions and
emissions.
• Plan periodic maintenance to replace or repair defective components.
Certain chemicals and waste products are highly combustible and should not be incinerated (box
10.1).
Box 10.1. Types of wastes that should not be incinerated
• Plastics at low temperatures
• Large amounts of reactive chemical waste
• Pressurized gas containers (e.g., aerosol cans)
• Silver salts and photographic or radiographic wastes
• Plastics containing polyvinyl chloride (e.g., blood bags, IV tubing, or disposable syringes)
• Waste with high mercury or cadmium content (e.g., broken thermometers, used batteries,
and lead-lined wooden panels)
• Radioactive materials
• Pharmaceuticals thermally stable in conditions below 1,200 °C (2,192 °F) (e.g., 5
fluorouracil)

Source: WHO 2014
Small-Scale Incinerator for Waste Disposal
Ideally, a small-scale incinerator (figure 10.4) should have the following characteristics:
• Has a minimum of two chambers.
• Operates within a temperature range of 650–1,000 °C (1,202–1,832 °F).
• Has a minimum of 1-second smoke-residence time (i.e., amount of time that the gases
take to travel through the incinerator).
• Is corrosion-resistant.
Figure 10.4. Standard components of a small-scale incinerator
Source: PATH 2010
Encapsulation of Waste
Encapsulation is the process of mixing waste with cement or other substances before disposal. This
process is used to reduce the risk of injury to people, reduce access to scavengers, and minimize the
risk of toxic waste migrating into surface water or groundwater. Encapsulation is primarily designed
for the safe disposal of sharps, but can also be used for disposal of solid residues from wastewater
treatment, incinerator ash, or small quantities of heavy metals (e.g., mercury), chemicals, and
cytotoxic pharmaceuticals when they cannot be returned to the manufacturer. Hard plastic boxes or

metallic drums can be filled to three-quarters full and then topped with wet cement or clay. After
hardening, the containers can be sealed and disposed of safely in a landfill. For waste containing
small quantities of heavy metal, create a mixture of 65% waste material, 15% lime, 15% cement,
and 5% water. This mixture is then poured into a container (e.g., plastic or metal) and allowed to
settle. Once it has completely dried, the container can be disposed of in a landfill (WHO 2014).
Burying of Waste in Sanitary Landfills
In healthcare facilities with limited resources, short-term safe burial of wastes on or near the facility
may be the only option available for waste disposal. Safe onsite burial is practical for only limited
periods of time (one to two years) and for relatively small quantities of waste. Burial can be used as
a method of waste disposal only where the water table is more than four meters (13.1 feet) below
the surface. During this interval, the healthcare facility should continue to look for better, permanent
methods for waste disposal.
Note: Large quantities (over 1 kg [2.2 pounds]) of chemical (liquid) wastes should not be buried at the same
time, and burning of chemical waste should be spread over several days.
Limit health risks and environmental pollution from burying healthcare waste by:
• Restricting access to the disposal site: build a fence around the site to keep animals and
children away.
• Lining the burial site with a material of low permeability (e.g., clay), if available.
• Selecting a site at least 50 meters (164 feet) away from any water source to prevent
contamination of the water table.
The site should:
• Have proper drainage
• Be located downhill from any wells
• Be free of standing water
• Not be in an area prone to flooding
How to Make and Use a Small Burial Site for Waste Disposal
STEP 1 Find an appropriate location.
STEP 2 Dig a pit 1 meter (3.2 feet) square and 2 meters (6.5 feet) deep. The bottom of the pit
should be 2 meters (6.5 feet) above the water table. Line the pit with clay or other low-
permeable material.
STEP 3 Dispose of the infectious waste in the pit and cover the waste with 10–15 cm (4–6
inches) of dirt each day. The final layer of dirt should be 50–60 cm (20–24 inches) and
compacted to prevent odors and attraction of insects, and to keep animals from digging

up the buried waste. Depending on the volume of waste, this pit should last 30 to 60
days (figure 10.5) (WHO 2014).
Figure 10.5. Plan for a small burial pit
Source: WHO 2014
Disposable Sharps
Sharps (e.g., hypodermic needles, suture needles, razors, and scalpel blades) require special
handling because they are the items most likely to injure the HCWs who use them and people in the
community if these items go to the municipal landfill without proper treatment methods.
Treatment and disposal methods for sharps include:
• By autoclave, followed by shredding (mechanical), and then disposal in a landfill or
sharps pit.
• By incineration (sharp objects may not be completely destroyed by incineration, but it
does make them less likely to be reused or repurposed and less risky to handle) and
disposal in an ash pit.
• By shredding (mechanical) and disposal in a sharps pit. (There is a risk of exposure to
staff handling non-decontaminated sharps.)
• If other treatment options are not available, small quantities of sharps waste can be
encapsulated and disposed of in a landfill.
Disposal of Liquid Infectious Waste
Liquid infectious waste includes liquid culture media, blood, body fluids, and human excreta.
Products that can be added to liquid waste to solidify it for safer handling may be available.
Steps for the proper handling of liquid infectious waste in volumes greater than 20 mL:

STEP 1 Put on PPE (utility gloves, face protection, long-sleeved, fluid-resistant gown, and
plastic apron, protective shoes) when handling liquid wastes. (See Volume 1, Chapter
5, Personal Protective Equipment.)
STEP 2 Determine if the wastes require pretreatment before disposal. Blood and other
infectious agents from laboratory work should be sterilized by steam sterilization at the
earliest stage (i.e., inside the healthcare facility) before disposal, if possible.
STEP 3 Carefully pour liquid wastes down a utility sink drain or into a flushable toilet and
thoroughly rinse with water to remove residual wastes. Clean and disinfect the surfaces
(e.g., toilet or sink) to remove residual wastes using 1.0% chlorine solution and avoid
splashing the chlorine solution. If a sewerage system does not exist, dispose of liquids
using incineration or burial and not into open drains.
STEP 4 Wash the container that held the waste with detergent and water, disinfect using
intermediate- or low-level disinfectant, and dry completely before storing and using.
(See Volume 1, Chapter 9 Environmental Cleaning; Volume 2, Section 3, Chapter 3:
Clinical Laboratory Biosafety.)
STEP 5 Remove PPE.
STEP 6 Perform hand hygiene.
(WHO 2014)
Disposal of Liquid Waste from Highly Infectious Diseases
During outbreaks of cholera and VHF, such as EVD, healthcare facility sewage must be treated and
disinfected. Vibrio cholerae, the causative agent of cholera, and Ebola are easily killed and do not
require the use of strong disinfectants. Chlorine solutions are not effective in disinfecting liquids
with high organic content, such as blood and stool. Therefore, in situations such as a cholera and
outbreaks of VHF, feces and vomit should be mixed with lime milk (calcium oxide) dry powder in
a ratio of 1:2 for a minimum of six hours of contact before disposing. Urine can be mixed with a
1:1 ratio with two hours of minimum contact before disposing (WHO 2014).
Disposal of Pathological Waste
Pathological waste consists of tissues, organs, body parts, placentas, blood, body fluids, and other
waste from surgery and autopsy. It also includes human fetuses. It is sometimes referred to as
anatomical waste. Containers with pathological waste should be appropriately labeled using
recommended labeling for infectious waste.
In many cultures, burying placentas is an important custom. In low-resource settings, a placenta pit
is an effective option for safe disposal. The site for a placenta pit should minimize public
accessibility and the size will depend on the number of daily childbirths in a facility. On average,
one placenta and associated fluids require 5 liters (1.5 gallons) of pit capacity. Natural degradation
and draining of liquid into the subsoil greatly reduce the volume of waste in the pit and facilitate
the inactivation of pathogens. Small quantities of anatomical waste (e.g., body parts) may also be

disposed of in placenta pits, if other treatment options are not available or if sociocultural or
religious norms prohibit other forms of treatment.
The pit should be designed to prevent the contents from contaminating the groundwater (figure
10.6). The bottom of the pit should be at least 1.5 meters (5 feet) above the level of the groundwater.
Placenta pits are not recommended for sites where the water table is near the surface or in flood-
prone areas (WHO 2014).
Placenta pit
Figure 10.6. Placenta pit plan
Source: Ali and Ahmed 2016
Traditional options for disposal of pathological wastes:
• Burying in cemeteries or special burial sites
• Burning in crematoria or specially designed incinerators
• Placenta pit

Steps for Using a Placenta Pit
Construct a placenta pit and dispose of placentas in the pit. (See figure 10.6 in the section titled
placenta pit plan.)
• Open the cover of the pit and dispose of placentas and other organic waste into the pit as
soon as possible without adding any disinfection to allow appropriate biodegradation to
kill microorganisms and other cells.
• Keep the opening of the pit covered with a heavy lid or a concrete slab.
• Close the pit once it is filled up to 0.5 meter below the underneath slab. Keep it closed
for two years.
The contents of the pit can be safely removed and disposed of in a sanitary landfill and the pit can
be used again.
If a placenta pit is not available, for example, in areas with high water table, the option is to incinerate
or bury the pathological waste in a burial pit. Never leave pathological waste out in the open.
Other Hazardous Wastes
Chemical Waste
Chemical waste includes residues of chemicals in their packaging, outdated or decomposed chemicals,
or chemicals that are no longer required. Small quantities of chemical waste are generally collected in
containers with infectious waste and can be incinerated, encapsulated, or buried. Large quantities of
chemical waste should not be collected with infectious waste. Because there is no safe and inexpensive
method for the disposal of chemical waste, the following options are recommended:
• Return the chemical waste to the original supplier. This is the best option for the
disposal of specific chemical waste.
• Incinerate at a high temperature.
Because these chemical waste disposal methods can be expensive and may be impractical, it is
important to keep chemical waste to a minimum. (See the Reduction of Healthcare Waste section
above in this chapter.)
Note: Different types of chemical waste should never be mixed. Chemical waste should not be disposed of
in a sewer system.
Chemical Containers
For plastic containers that held toxic substances, such as glutaraldehyde (e.g., Cidex) or
formaldehyde, rinse three times (dispose of the rinse water as chemical waste) with water and
dispose of by burning, encapsulating, or burying. Do not reuse these containers for other purposes.
Wear proper PPE to protect the eyes and skin from splashes, and rinse glass containers thoroughly
with water. Glass containers may be washed with soap, rinsed, and reused.

Pharmaceutical Waste
Small quantities of non-hazardous pharmaceutical (drugs or medicines) waste are usually
incinerated, encapsulated, or safely buried. Examples of non-hazardous pharmaceutical waste
include vitamins, salts, and amino acids (ampoules and fluids), solid or semi-solid tablets, granules,
powders, creams, gels, lotions and suppositories, and aerosols (e.g., sprays and inhalers). All
controlled substances, cytotoxic/genotoxic drugs, anti-infective/antibiotic drugs, and disinfectants
and antiseptics are considered hazardous waste (WHO 2014). It should be noted that temperatures
reached in a single-chamber drum or brick incinerator may be insufficient to totally destroy
pharmaceuticals and they can therefore remain hazardous.
Options for disposal of small quantities of pharmaceutical waste, such as outdated drugs (except
cytotoxic drugs and antibiotics), include the following:
• Return of expired pharmaceuticals to the donor or manufacturer
• Encapsulation and burial in a sanitary landfill
• Chemical decomposition as per the manufacturer’s recommendations
For moderate quantities of relatively mild liquid (e.g., vitamin solutions, cough syrups, intravenous
solutions, eye drops), dilute in large amounts of water and discharge into a sewer. Antibiotics or
cytotoxic drugs should not be discharged into municipal sewers or watercourses.
Large quantities of pharmaceutical waste may be disposed of by the following methods:
• Water-soluble, relatively mild pharmaceutical mixtures (e.g., vitamin solutions, cough
syrups, intravenous solutions, eye drops) may be diluted in large amounts of water and
then discharged into sanitation systems.
• Pharmaceutical waste can be returned to the original supplier, if possible.
• Cytotoxic drugs and antibiotics may be incinerated; the residues (i.e., what is left over
after the wastes have been incinerated) can go into a landfill. An incinerator that is
capable of reaching a combustion temperature of at least 1,200 °C (2,192 °F) should be
used. Temperatures below 1,200 °C may release cytotoxic vapors.
• Residues from cytotoxic drugs or other cytotoxic waste should never be mixed with
other pharmaceutical waste.
• Cytotoxic waste should never be discharged into natural water sources (rivers, lakes,
etc.) or landfills.
• If the above options are not available, cytotoxic substances may be encapsulated.
Waste with a High Content of Heavy Metals
Examples of wastes with heavy metal content include batteries that contain cadmium,
thermometers, and blood pressure machines containing mercury. Mercury is a potent neurotoxin,
especially during fetal and infant development. When released into water or air, mercury will enter
the environment and contaminate lakes, rivers, and streams. To minimize the risk of mercury

pollution, mercury-containing products (e.g., thermometers and blood pressure equipment) should
be replaced with those that do not contain mercury.
Waste with high content of heavy metals should not be incinerated because of the toxic metallic
vapors released into the air nor should it be buried without encapsulation (i.e., placed in a closed,
tight container) because it may pollute groundwater. Usually, healthcare facilities have small
amounts of this type of waste. Disposal options include:
• Recycling—the best disposal solution, if available.
• Encapsulation, if recycling is not feasible—encapsulated waste may be disposed of in a
landfill.
Note: Do not touch mercury droplets with your hands unless wearing non-sterile or utility gloves.
Steps for disposal of mercury:
STEP 1 Put non-sterile gloves on both hands.
STEP 2 Collect all droplets of mercury with a spoon.
STEP 3 Place mercury in a small, plastic container with a tight-fitting lid and send it to the
manufacturer. If this is not possible, encapsulate mercury before final disposal in a landfill.
The procedure for final disposal of mercury is complex and requires expertise. Stabilization of
mercury into an insoluble substance and use of an encapsulation approach are currently being
recommended for disposal of mercury.
Non-Recyclable Aerosol Containers
Pressurized containers should never be burned or incinerated because of the risk of explosion.
Before aerosol containers are buried, any residual pressure should be released.
In summary, avoid buying or using chemical products that create difficult or expensive disposal
challenges, whenever possible. The ability of the healthcare facility to safely dispose of the product
after it is finished should be one of the considerations during product selection.
SUMMARY
Healthcare waste is potentially hazardous. Healthcare facilities are responsible for managing the
waste they produce and appropriate management requires the collective efforts of various HCWs.
However, waste management is complex and managing waste is challenging for facilities in
resource-limited settings. Guidelines for disposal of waste from healthcare facilities set out by WHO
in 2014 may not be immediately attainable by many facilities. Waste minimization to limit the
volume of hazardous waste produced and waste segregation to minimize the proportion of the total
waste that is infectious or hazardous are key waste management measures in all settings. Choosing
the best available waste disposal method and working toward safer waste disposal to protect the
community and the environment is essential. Effective waste management will save resources,
reduce costs, and prevent injuries and exposure to infectious disease.

BIBLIOGRAPHY
CHAPTER 10: HEALTHCARE WASTE MANAGEMENT
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Doumtsop, JG. 2014. Health care waste management: A multi speed development in the sub-Sahara
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and maintaining small-scale incinerators in low-resource settings.
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Non-incineration treatment and disposal of healthcare waste.
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control in health care facilities. Manila: WHO Regional Office for the Western Pacific.
https://apps.who.int/iris/handle/10665/206946

Chapter 11: Food and Water Safety 238
CHAPTER 11: FOOD AND WATER SAFETY
Key Topics
• Managing water and food services
• Water safety
• Water quality monitoring and surveillance
• Prevention of food and waterborne diseases occurrence among patients hospitalized in healthcare
settings
BACKGROUND
Healthcare-associated diarrhea is a common problem in hospitals, children’s care facilities, and
nursing homes (Lynch et al. 2007). Outbreaks in healthcare facilities among hospitalized patients
have mostly been associated with unsafe food and water. A variety of organisms, including
Salmonella, Shigella, C. difficile, V. Cholera, C. albicans, Staph. aureus, cryptosporidium,
rotavirus, and other enteroviruses are responsible for contamination of food and water. Factors that
increase the risk of water- and foodborne diseases in healthcare facilities include the fact that
they serve food for more hours, serve food for ill and immune-compromised patients, transport and
distribute food at a greater distance, and prepare nasogastric feeding and special diets. In general,
the staff are often transient, poorly trained in food handling, and engage in unsafe practices
involving the storage, preparation, and handling of raw meat, chicken, fish, fresh eggs, and some
vegetables. Moreover, the quality of drinking water in countries with limited resources is often
poor and unsafe, again contributing to the poor quality of food services hygiene (scabies and
trachoma).
Managing Food and Water Services
Planning, implementing, and monitoring food and water service in healthcare facilities are of
great value in preventing food and water contamination, which at times leads to infection or
outbreaks among the hospitalized patients from such causes.
Principles of Food Safety
All activities in the food service department should be monitored regularly to be sure that safety
standards are being followed. They include:
• Temperature should be kept above 60oC/140oF or below 7oC/45oF. The
temperature pertinent for the right storage of food should be maintained and checked
periodically. Warm and perishable foods should be cooled while stored.
• Cooking should be complete and standardized. Frozen food items should be thawed
before cooking to avoid the presence of cold spots in the interior.
• Personal health and hygiene of food service staff is of great importance and staff
engaging in food service should be supervised by a knowledgeable person. Hand
hygiene plays a crucial role in preventing healthcare-associated diarrhea and other

related health problems. The staff should report any gastrointestinal problems or skin
lesions, especially on the hands. They need to know how to inspect properly; prepare
and store the foods they handle; how to clean and operate equipment they use, such as
slicers, blenders, and dishwashers, if they are available, and also the management of
waste.
Food utensils should be washed using a three-compartment washing system. These are washing,
cleansing, and sanitizing compartments.
Food Contamination
Food can be contaminated by the following three main hazard types:
• Physical hazards (foreign objects): metal, wood, glass, plastic, etc.
• Chemical hazards: bleach, caustic soda, detergents, pesticides, etc.
• Microbiological: bacteria, viruses, molds, and parasites
Food that is contaminated with any of these hazards is unsafe and unsuitable to eat.
Bacterial Food Poisoning
Bacteria are single-celled living microorganisms. The most common form of food poisoning is
bacterial food poisoning. To survive and multiply, bacteria need water, food, correct temperatures,
and time. Most, but not all, need oxygen. Under these conditions, bacteria will multiply by dividing
into two every 10 to 20 minutes. After six hours, one bacterium can multiply into 262,144 bacteria,
more than enough to cause food poisoning.
How Do Bacteria Enter a Food Premises?
• Food handlers (especially their hands)
• Raw foods, such as meat, poultry, shellfish, and vegetables
• Pests and animals
• Air and dust
• Dirt and food waste
Potentially Hazardous Foods
• Potentially hazardous foods support the growth of bacteria. They need to be kept at
temperatures either below 5 °C or above 60 °C to prevent the growth of any food
poisoning bacteria that may be present in the food.
• Examples of potentially hazardous foods include meat, poultry, seafood, eggs, dairy
foods, gravies, and cooked rice.

Causes of Food Poisoning
1. Food at incorrect temperatures
Under ideal conditions, bacteria multiply rapidly between 5 °C and 60 °C (the danger zone for food).
Below 5 °C, bacteria multiply slower. At freezing temperatures, bacteria stop multiplying and
become dormant. Freezing does not kill bacteria; most bacteria are killed at temperatures above 60
°C.
2. Cross-contamination
Cross-contamination occurs when food becomes contaminated with bacteria from another sources.
Bacteria can be transported by hands, utensils, surfaces, equipment, tea towels, raw food, and pests.
Common examples of cross contamination include unclean hands; dirty knives; utensils; equipment
and food contact surfaces (e.g., chopping boards); blood dripping from raw foods; storing raw food
with cooked foods; storing food uncovered; and using dirty cleaning cloths and tea towels.
3. Poor personal hygiene
Examples of poor personal hygiene include: Dirty hands and clothing; uncovered cuts and
wounds; long dirty fingernails; excess jewelry on hands and wrists; coughing and sneezing over
food; handling food while ill; and not washing hands after going to the toilet.
4. Unclean food premises
Dirty kitchens increase the risk of cross-contamination from pests and particles of food, grease, and
dirt.
5. Poor pest control. Common pests found in food premises include:
Flies, cockroaches, rats, and mice. These pests can carry food poisoning bacteria and may also cause
physical contamination of food with their droppings, eggs, fur, and dead bodies.
Actions for the Prevention of Food Poisoning
1. Temperature control
Minimize the time that potentially hazardous foods spend in the danger zone; always remember to
keep cold food cold at 5 °C or colder and hot food hot at 60 °C or hotter.
All food services at health facilities are required to obtain and use a probe thermometer, accurate to
±1 °C to monitor the temperature of potentially hazardous foods.
2. Avoid cross-contamination: To avoid cross-contamination do the following:
Keep food covered until used. Practice correct personal hygiene. Separate raw and cooked, and old
and new food at all times. Use separate equipment and utensils when preparing raw meats, poultry,
and seafood. Clean and sanitize all equipment, utensils, and food contact surfaces. Store chemicals
separate from food.

3. Personal hygiene: the following should be considered:
Clean hands and clothing; minimize jewelry on hands and wrists; tie back or cover hair; clean and
short fingernails; avoid unnecessary contact with food; cover all cuts and sores with a brightly
colored waterproof dressing; do not eat over food or food surfaces; do not prepare food when you
are ill; avoid touching your face and hair; do not cough or sneeze over food; do not taste food with
your fingers or “double dip” with a spoon and if wearing gloves, change frequently.
Proper Handwashing
When should you wash your hands? Before starting or resuming work; after using the toilet;
after smoking; after handling rubbish; after using a handkerchief or tissue; after touching your
hair or face; before and after handling raw food; before handling cooked food; and after any
cleaning task.
Handwashing facilities must be accessible to all food handlers, to be used only for the washing
of hands, and should provide soap and warm portable water. Provide disposable towels for
drying hands. Provide a bin for the disposable towels.
4. Cleaning
Must be continuous and ongoing; thoroughly clean and sanitize all food surfaces, equipment and
utensils with hot water and detergent and chemicals (sanitizers). Remember that most detergents do
not kill bacteria, but hot water and sanitizers do! Implement a cleaning schedule to ensure that
cleaning is conducted on a regular basis (including hard-to-reach places).
Cleaning and Sanitizing With/Without a Dishwasher
• Wear rubber gloves to protect your hands from the hot water and chemicals.
• Remove food particles by scraping or soaking.
• Wash using hot water and detergent; change the water if it becomes cool or greasy.
• Rinse in hot water with chemical sanitizer or in very hot water (above 80 °C - only if
sink has heating element and rinsing baskets) and leave to soak for 30 seconds.
• Either drip-dry or use a clean tea towel to reduce the risk of cross-contamination.
5. Pest Control
• Keep them out: seal the food premises.
• Starve them out: keep the food premises clean.
• Throw them out: conduct regular pest inspections or services.
• Don’t give them a home: remove all unnecessary equipment and items.
• Report all pest sightings or evidence of pest activity to your supervisor.
6. Waste Management
• Place waste in plastic lined bins.

• Remove all waste from the premises as required.
• Empty and clean waste bins regularly.
• Ensure that all external bins are covered.
• Protect the external waste bin area from pests and birds.
Water Safety
The quality and quantity of drinking water is a major determinant of health. The most predominant
waterborne disease—diarrhea—kills around 525,000 children under five each year. A significant
proportion of diarrheal disease can be prevented through safe drinking water and adequate sanitation
and hygiene. Diarrhea is a leading cause of malnutrition in children under five years old (WHO 2017).
There are several variants of the fecal-oral pathway of waterborne disease transmission. There are
four categories of infectious diseases transmission pathways through the water supply:
• Waterborne diseases
• Water-washed diseases
• Water-based diseases
• Water-related diseases
Drinking Water Quality and Safety
Drinking water should be suitable for human consumption and for all usual domestic purposes.
Drinking water contamination and chemical introduction can occur across the water supply chain.
These include contamination at the catchment areas and water sources (by human and animal feces).
Transmission can also result from contamination in the distribution system (through “leaking”
pipes, obsolete infrastructure, and inadequate treatment and storage) and unhygienic handling of
stored household water. Climate change can also affect the quality of drinking water.
Water Quality Parameters
There are three categories of parameters for drinking water: physical, chemical, and bacteriological. A
national standard for drinking water quality was adapted from WHO recommendations (table 11.1).
Table 11.1. National standard for drinking water
Source: Ethiopian Standards Agency 2013

Water Quality Monitoring and Surveillance
Drinking-water supply surveillance refers to “continuous and vigilant public health assessment and
review of the safety and acceptability of drinking water supplies” (WHO 2011). It is the careful
watching and protecting of drinking water from possible contamination risks.
Four Components of Drinking Water Quality Supply
• Sanitary inspection/survey: identify hazards
• Water quality monitoring/testing
• Data analysis, interpretation, and reporting
• Remedial action
It includes institutional inspection, sanitary survey, continuous monitoring of physicochemical and
microbiological parameters (laboratory or spot testing of water samples collected at different
locations, [i.e., at source, pipeline, reservoirs, and delivery points]) and time, data processing, and
evaluation followed by remedial action and preventive measures.
Water Quality Monitoring
Improving and monitoring water quality require strong and consistent monitoring mechanisms to
measure progress, and to direct efforts where the needs are greatest. Monitoring water quality at the
facility level is important to detect contaminants early. Water containers and tankers should be
cleaned and disinfected regularly, and the water should be tested regularly.
Water Sampling Methods
Basically, there are two types of sampling methods:
• Probability
• Non-probability
1. Probability Sampling Methods
Every unit of the population has an equal chance (probability) of being selected in the sample.
Methods include:
• Simple random sampling: A subset of a statistical population in which each member of
the subset has an equal probability of being chosen.
• Systematic random sampling: Systematic sampling is a statistical method involving
the selection of elements from an ordered sampling frame.
• Cluster sampling is a sampling technique used when "natural" but relatively
homogeneous groupings are evident in a statistical population.
• Stratified random sampling is the process of dividing members of the population into
homogeneous subgroups before sampling.

2. Non-probability sampling does not use random selection. The generalization of the findings is
not possible because the sample is not representative of the population.
• Convenience sampling: a sample population is selected because it is readily available
and convenient.
• Quota sampling: a population is first segmented into mutually exclusive subgroups.
• Snowball sampling: The first respondent refers a friend. The friend also refers a friend,
and so on. Table 11.2 shows sample volume and transportation conditions.
Table 11.2. Sample volume and transportation conditions
Sample type Amount required Transport and storage Stability
Chlorinated
water sample
100 ml Water should be collected to a sterile container
with lid and transported in an insulated cold
box as soon as possible to the laboratory
6 hours
Unchlorinated
water sample
105 ml Water should be placed in an insulated cold
box for transport to a water testing site
Sample Dechlorination
• When samples of chlorinated effluents are to be collected and tested, the sample must be
dechlorinated.
• Chlorine remaining in the sample can further disinfect the sample during any holding
time after sample collection.
• Because sterile sampling procedures must be followed for a valid bacteriological test,
the dechlorination steps cannot be performed after the sample is collected.
• Procedure for dechlorination of bacteriological samples is as follows:
o When the water to be examined is likely to contain chlorine or chloramines,
sufficient sodium thiosulphate (Na2SO3*5H20) to neutralize this substance must be
added to each bottle as follows:
o Add 2-3 drops of sodium thiosulphate to sample collection bottle.
o Grams of chemicals required to neutralize residual chlorine concentrations
in 378,500 L of water. Table 11.3. shows sample dechlorination.
Table 11.3. Sample dechlorination
Residual chlorine concentration (mg/L) Sodium thiosulfate pentahydrate (Na2S2O3.5H2O)
0.3 181.44g
0.6 317.51g
0.9 498.95g
1 544.31g
1.3 725.75g

How to Collect Water Samples
• Samples should be collected in a non-reactive borosilicate glass plastic bottle or plastic
bag that has been cleaned, rinsed, and sterilized.
• 105 ml for unchlorinated and 100 ml for chlorinated water sample are the minimum
volumes that should be taken as a sample to obtain reliable results, especially for
microbiological testing. More water should be collected than needed (i.e., 200–1000 ml)
if multiple tests are required.
Labeling of Water Sampling
Every sample container should have a label. The sample label has information about:
• Sample location
• Sample description (e.g., inlet water, storage bucket water)
• ID number
• Date and time
• Name of the person collecting the sample
• Test to be performed (optional)
Sampling Tap Water
• Remove any external fitting from the tap; carefully clean and disinfect the inside and
outside of the tap.
• Carefully cleaning the outside nozzle of the tap ensures that any deposits in the pipes are
washed out.
• Turn the tap on full for one minute.
• Sterilize the tap using the flame of a blow lamp or by igniting a piece of cotton wool
soaked in alcohol.
• Allow the tap to cool by running the water to flow for few seconds.
• Fill the sample bottle from the gentle flow of water, and replace the cap of bottle.
 Using a waterproof marker, number the bottle with a sample code.
How to Transport Water Samples
• Bacteria do not generally survive well in water due to a variety of factors. It is well
known that the number of bacteria in a water sample rapidly decline 24 hours after it has
been collected. Temperature can also affect the die off in the water sample, with higher
temperatures leading to greater die offs.

• Samples should be collected and placed on ice in an insulated container if they cannot be
tested immediately; preferably held at <10 °C during transit. Samples should be tested
the same day and refrigerated overnight, if necessary.
• If the time between collection and test exceeds six hours, the final report should include
information on the conditions and duration of sample transport. Samples exceeding 30
hours holding time (from collection to testing) should not be tested. The minimum
sampling frequency for drinking water in a distribution system is given in table 11.4.
Table 11.4. Recommended minimum sample numbers per year for E. coli testing in piped distribution
systems
Prevention of Food and Waterborne Diseases Occurrence Among Patients
Hospitalized in Healthcare Settings
Hospitalized patients and caretakers should be trained and assisted on handwashing during critical
times (before preparing food, before eating, after using the toilet).
A medical checkup of food handlers should be done quarterly. The checkup for diseases transmitted
through contaminated food, water, or air should be carried out on regular basis. Cleanliness of the
kitchen has to be done on a daily basis; it should be monitored and verified to avoid contamination
of food during cooking.
Transportation and storage of raw and cooked food: Purchased raw food has to be transported
to the healthcare facilities with transportation free from biological and chemical contaminants.
Storage of raw and cooked food should be separate and done in line with the recommended
temperature for each type of food to be stored (for example, easily perishable and cereals). In brief,
the whole process, including food handling, has to be monitored daily. Food items should not be
shelved with toxic materials, such as detergents, disinfectants, fuel, etc. If there is no option other
than to shelve together, shelve food items at the top and other materials at the bottom.
Water safety principles: Identify the quality of the water source used by the healthcare facility:
biological quality of the source (total Coliform and E. coli count based on WHO guideline value or
country water quality standard, if available). If it is feasible, also examine the chemical quality.
Infected patients should be restricted from using communal baths.
• Collection, transportation, storage, and handling of water: Healthcare facilities have
to collect, transport, store, and handle water with precaution to avoid the risk of
contamination (i.e., use properly washed/sanitized container to collect and store water,

separate container for drinking and other purpose by clearly writing on the container
which is for which).
• Making water collected from unsafe sources safe for hospitalized patients: Water
boiled for one to five minutes is considered safe to drink, whereas water boiled for 20
minutes is labeled as high-level disinfected and is even safer. Alternatively, water can be
disinfected and made safe for drinking by adding 3-5 parts per million (ppm) chlorine
based on the water quality and the residual Cl should be 0.2-0.5 ppm. The formula for
preparing 0.001% of chlorine solution is given in these guidelines.
• Monitoring/inspection: The quality of water used by healthcare facilities, including its
sources, collection, and storage, should be inspected regularly. The microbial water
quality of the sources should also be monitored quarterly.
o There are two types of sampling methods: probability and non-probability. When the
water to be examined is likely to contain chlorine or chloramines, sufficient sodium
thiosulphate (Na2S2O3.5H2O) to neutralize this substance must be added.
SUMMARY
Factors that increase the risk of water- and foodborne diseases in healthcare facilities include the
fact that they serve food for more hours, serve food for ill and immune-compromised patients,
transport and distribute food at a greater distance, and prepare nasogastric feeding and special diets.
In general, staff are often transient, poorly trained in food handling, and engage in unsafe practices
involving the storage, preparation, and handling of raw meat, chicken, fish, fresh eggs, and some
vegetables. The quality of drinking water in countries with limited resources is often poor and
unsafe, again contributing to poor quality food services.
Healthcare-associated diarrhea is a common problem in hospitals, children’s care facilities, and
nursing homes. Outbreaks in healthcare facilities among patients hospitalized have mostly been
associated with unsafe food and water.
BIBLIOGRAPHY
CHAPTER 11: FOOD AND WATER SAFETY
facilities-limited-resources.
Ethiopian Standards Agency. 2013. Compulsory Ethiopian standard. Drinking water – specifications.
https://reliefweb.int/sites/reliefweb.int/files/resources/drinking_water_specifications.pdf.
Federal Ministry of Health Ethiopia. 2004. Infection prevention guidelines for healthcare facilities in
Ethiopia. https://www.ilo.org/wcmsp5/groups/public/---ed_protect/---protrav/---
ilo_aids/documents/legaldocument/wcms_125383.pdf.
National Drinking Water Quality Monitoring and Surveillance and Response Guideline, 2017
https://www.cmpethiopia.org/content/download/2862/11842/file/WQMS&R%20Guideline,%20June%20201
7.pdf

The Federal Democratic Republic of Ethiopia, Ministry of Health. 2016. Ethiopia national hygiene and
environmental health strategy.
https://www.cmpethiopia.org/content/download/3559/14553/file/Hygiene%20and%20EH%20strategy.pdf
The Federal Democratic Republic of Ethiopia, Ministry of Health. Ethiopia, 2017 Integrated urban sanitation
and hygiene strategy. https://e-library.moh.gov.et/library/wp-content/uploads/2021/07/IUSHS-English-
strategy-final.pdf
Lynch, P, Pittet, D, Borg, MA, Mehtar, S. 2007. Infection control in countries with limited resources. The
Journal of Hospital Infection, 65 Suppl 2:148-50. https://pubmed.ncbi.nlm.nih.gov/17540260/
WHO. 2002. Prevention of hospital-acquired infections: A practical guide, 2nd Ed.
https://www.who.int/csr/resources/publications/drugresist/en/whocdscsreph200212.pdf?ua=1
WHO. 2017. Diarrheal diseases. https://www.who.int/news-room/fact-sheets/detail/diarrhoeal-disease
WHO. 2011. Guidelines for drinking-water quality, 4th edition. Geneva: WHO.
https://apps.who.int/iris/bitstream/handle/10665/44584/9789241548151_eng.pdf.

Chapter 12: Facility Design and Patient Flow 249
CHAPTER 12: FACILITY DESIGN AND PATIENT FLOW
Key Topics
• The significance of regulating traffic flow and defining activity patterns in health facilities.
• Designing traffic flow and activity patterns in procedure rooms, and in instrument processing and
surgical areas.
• Traffic flow requirements for different areas.
BACKGROUND
Regulating the flow of visitors, patients, and staff plays a central role in preventing disease
transmission in healthcare facilities. This is because the number of microorganisms in a designated
area tends to be related to that of the number of people present and their activity. Microbial
contamination is found to be high in such areas as waiting rooms and places where soiled surgical
instruments and other equipment are initially processed. Microbial contamination is minimized by
reducing the number of people coming to the area and defining the activities taking place at
each place.
An important objective of IPC is to minimize the level of microbial contamination in areas where
patient care and instrument processing take place. Areas for instrument processing include
procedure areas, surgical units, and work areas (where instruments are processed). These include
dirty and clean areas where soiled instruments, equipment, and other items are first cleaned and
then processed and stored. It is important to direct activity patterns and traffic flow in the above-
mentioned areas to keep contaminated areas separate from areas where procedures take place. The
major areas are:
• Procedure areas are settings where patients are examined and procedures (e.g., pelvic
examinations, wound care management, blood drawing, immunizations, IUD insertions
and removals, and normal childbirth) are carried out.
• Surgical units are settings where major and minor operations are performed. The
surgical unit also includes preoperative and recovery rooms and several other areas.
• Work areas are settings where instruments are being processed. These include dirty
and clean areas where soiled instruments, equipment, and other items are first cleaned
and either high-level disinfected or sterilized and then stored.
It is important to direct activity patterns and traffic flow in these areas to keep contaminated
areas separate from areas where procedures take place. Activities, such as waste disposal, instrument
processing, and cleaning procedure areas, should be carefully planned and organized to minimize
the risk of infection to patients and HCWs. Equally important is designing and implementing traffic
flow patterns that prevent soiled instruments and other items from coming across to the cleaned,
high-level disinfected or sterilized items. Traffic flow is also related with separating people who
have or are likely to have communicable diseases from those who are at risk (susceptible). These
people pose a great risk to susceptible patients and HCWs simply by availing themselves in the
same room; therefore, it is necessary to identify and remove them quickly.

Facility Design, Space, and Equipment Requirements
Healthcare facilities vary in the types of services they provide. For example, a rural clinic may offer
only a few procedures (e.g., IUD insertion and removal, immunizations, antenatal care, and minor
surgery for suturing wounds). Larger facilities (including district and referral hospitals) provide
major and minor general surgical procedures, and child delivery services, in addition to ambulatory
procedures. Regardless of the size of the facility, the specific space and equipment requirements to
perform a particular procedure do not generally vary.
Microbial contamination can be substantial in highly trafficked areas and places where soiled
surgical instruments and other equipment are initially processed. Basic principles of facility design,
traffic flow, and work practices that can be applied to reduce microbial contamination include:
• Designating appropriate traffic flow for patients, HCWs, and equipment to ensure the
safe separation between contaminated items and clean/sterile items.
• Developing policies and procedures that establish clear authority, responsibility, and
accountability to ensure that these safe practices are adopted and practiced.
• Regulating the flow of visitors, patients, and staff using signs (e.g., authorized personnel
only), reminders (e.g., red line on the floor), and physical barriers (e.g., closed doors).
The amount of traffic and the number of individuals present in a designated area and
their activities contribute to the number of microorganisms present in that area.
• Using work practices that prevent contaminated items from contacting clean items, such
as working from dirty to clean. This is especially important if separate spaces for dirty
and clean items are not available.
• Ensuring that all staff understand the policies and procedures, for example, through new
staff orientation and ongoing training, to guarantee safe handling of clean and soiled items.
• Ensuring appropriate ventilation of operating rooms, procedure areas, Central Sterile
Supply Department (CSSD), and instrument processing areas.
• Using fans in facilities without mechanical ventilation to optimize existing ventilation.
The air should be drawn into the area and should be exhausted outside using one-way
exhaust fans. Where mechanical ventilation or fans are not available, the only option is
to use natural ventilation with open windows and doors fitted with mosquito nets.
• Designing new facilities and renovations with these principles in mind. For example,
healthcare facilities should have a dedicated central location where soiled instruments
can be reprocessed and that is physically separated from procedure areas.
In clinics where only minor procedures are performed, a procedure room with a handwashing sink is
required for examining clients and performing procedures. A separate room with at least one sink for
cleaning and an area for processing instruments and other items is also desirable (figure 12.1a).
Ideally, the processing area should include more than one room (e.g., a dirty room for receiving dirty
instruments and a clean room for final processing and storage). If only a single room is available
(figure 12.1a), soiled equipment should be received and cleaned in an area of the room distant enough
from areas where equipment is high-level disinfected or sterilized and then stored.

Although the space requirements for performing various minor surgical procedures may not be
different, it may still be quite different to some extent depending on the classification of the
procedure (semi-critical or critical), the instrument processing requirements (HLD or sterilization).
Inserting or removing an IUD, for example, is classified as a semi-critical procedure not normally
sterile, or can be made so if necessary (Spaulding 1968). By contrast, inserting a laparoscope into
the abdomen is classified as a critical procedure because tissues that are normally sterile are being
touched. For the former, either sterile or high-level disinfected instruments are acceptable, but for
the latter, the preferred final processing is sterilization. To sum up, it should be noted that sterile
metal instruments with laparoscopy call for an additional separate area for final processing (high-
pressure sterilization by autoclaving) (figure 12.1b). This is especially important if the volume of
services is high (five or more procedures per day).
Figure 12.1. a and b: Floor plans for instrument cleaning, high-level disinfecting, and sterilizing areas in a
clinic and larger facility
The space, equipment, and need for well-defined traffic flow and activity patterns become
progressively more complex as the type of surgical procedure changes from general surgery and
obstetrics to open heart surgery.
As a guide, the space requirements for the types of surgery typically performed at district hospitals
are roughly the same as that of a busy surgical center or polyclinic. They include:
• Changing room and scrub area for the clinic staff
• Preoperative area where clients are examined and evaluated before surgery
• Operating room

• Recovery area for the observation of patients after surgery (may be combined with
the preoperative area)
• Processing area for cleaning and sterilizing or high-level disinfecting instruments
and other items
• Space for storing sterile packs and/or high-level disinfected containers of instruments
and other items
Traffic Flow and Activity Patterns
The recommended IP practices for minimizing microbial contamination of specific areas in
healthcare facilities are briefly described below.
ICU and Isolation Room
• Limit traffic to authorized staff and patients at all times.
• Permit only the patient and staff (performing and assisting). Only two family members
should be allowed at a time in one room for a limited period of time in a day (wearing
clean attire and headcover).
• Patients can wear their own clean clothing.
• Staff should wear attire and PPE according to the procedures performed. Family
members who are allowed to enter should wear a headcover, face mask, gown, and shoe
cover above their clean clothes and shoes.
• Family member who reported to have acute upper respiratory tract infection should not
be allowed to enter.
Procedure Area
• Permit only the patient and staff (performing and assisting) in the procedure room
(family members should be limited with obstetrical procedures).
• Staff should wear attire and PPE according to the procedures performed.
• Place a clean container filled with clean water mixed with enzymatic detergent solution
(if available) for immediate immersing of instruments and other items once they are no
longer needed.
• Have a leak-proof and covered waste container for disposal of contaminated waste items
(cotton, gauze, dressings) right after use.
• Have a puncture-resistant container for the safe disposal of sharps (e.g., used suture
needles, hypodermic needles and syringes, and disposable scalpel blades) right after use.

• Have storage space in procedure rooms for clean, high-level disinfected and sterile
supplies. (Storage shelves should be enclosed to minimize dust and debris collecting on
stored items.)
Surgical Unit
The surgical unit is often divided into four designated areas defined by the activities performed in
each: unrestricted, transition zone, semi-restricted, and restricted area. Environmental controls
and use of surgical attire increase as one moves from unrestricted to restricted areas. Staff with
respiratory or skin infections and/uncovered open sores should not be allowed in the surgical unit.
Different Areas in Surgical Unit
Post signs in each area to clearly indicate the appropriate environmental control and surgical attire
required.
A. Unrestricted Area
This area is the entrance from the main corridor and is isolated from other areas of the surgical unit.
This is the point through which the staff, patients, and materials enter the surgical unit.
B. Transition Zone
This area consists primarily of dressing rooms and lockers. It is where the staff put on surgical attire
that allows them to move from unrestricted to semi-restricted or restricted areas in the surgical unit.
Therefore, only authorized staff should enter this area.
C. Semi-Restricted Area
This is the peripheral support area of the surgical unit. It includes preoperative and recovery rooms;
storage space for sterile and high-level disinfected items; and corridors leading to the restricted
area. This is an area where support activities (e.g., instrument processing and storage) for the
operating room are carried out. Therefore, it is important to do the following:
• Limit traffic to authorized staff and patients every time.
• Have a work area for the processing of clean instruments.
• Have storage space for clean, sterile, or high-level disinfected supplies with enclosed
shelves to minimize dust and debris collecting on stored items.
Flip flops or sandals should not be worn because they provide no protection from dropped sharps.
• Have doors limiting access to the restricted area of the surgical unit.
• Staff working in this area should wear surgical attire and a cap.
• Staff should wear clean and closed shoes that will protect their feet from fluids and
dropped items.

D. Restricted Area
This designated area consists of the operating room(s) and scrub sink areas.
Never store instruments and other items in the operating room.
• Keep the door closed at all times, except during movement of staff, patients, supplies,
and equipment.
• Scrubbed staff must wear full surgical attire and cover their heads and facial hair with a
cap and mask.
• Staff should wear clean and closed shoes that will protect their feet from fluids and
dropped items.
• Masks are required when sterile supplies are open and when the scrubbed staff are
operating.
• Patients entering the surgical unit should wear clean gowns or be covered with clean
linen and have their hair covered.
• Patients do not need to wear masks during transport unless the patient is under airborne
precautions.
E. Operating Room(s)
• The operating room should be enclosed to minimize dust and eliminate flies;
however, central air conditioning is necessary. (If windows are the only ventilation,
provide tight- fitting screens.)
• The operating room should be located away from areas of the hospital or
healthcare facility that are heavily staffed with frequent movements of staff and patients.
F. Work Area
Depending on the size and type of healthcare facility, the work area for processing instruments (e.g.,
the CSSD) may be part of the surgical unit; or just connected to it; or an independent area
somewhere away from it.
This is the area where instruments, surgical gloves, and equipment are processed, and where staff
should be specially trained in handling, processing, and storing instruments, equipment, and other
clean, sterile, or high-level disinfected items. The CSSD is considered a semi-restricted area; hence,
all the recommendations for traffic patterns and proper attire described above should be followed.
Permit only authorized personnel to enter this area.

How to Conduct Activities in the Surgical Unit
A. Before Surgical Procedures
• Place a plastic bag or leak-proof covered waste container for contaminated waste items
(cotton gauze and old dressings).
• Place a puncture-resistant container for the safe disposal of sharps (e.g., suture needles,
hypodermic needles and syringes, and disposable scalpel blades) at the point of use but
without contaminating the sterile field.
• Place a leak-proof and covered waste container for soiled linen away from sterile items.
• Organize tables, Mayo and ring stands side by side in an area away from the traffic
patterns and at least 45 cm (18 inches) from walls, cabinets, and other non-sterile
surfaces.
• Place a clean sheet, a lift sheet, and arm board covers on the operating room bed.
• Check and set up suction, oxygen, and anesthesia equipment.
• Place supplies and packages that are ready to open on the tables, not on the floor.
• Mayo stand and other non-sterile surfaces that are to be used during the procedure
should be covered with a sterile towel or cloth.
B. During Surgical Procedures
• Limit the number of staff entering the operating room only to those necessary to perform
procedures and to patients (family members, as deemed necessary). Make the surgical
team self-sufficient so that outside help is not required.
• Keep the doors closed at all times, except during movement of staff, patients, supplies,
and equipment.
• Keep the number of people and their movement to a minimum because the number of
microorganisms is directly proportional to an increase in people’s activity.
• Keep talking to a minimum in the presence of a sterile field.
• Scrubbed staff should wear full surgical attire, including:
o A clean scrub suit covering the bare arm (one or two pieces); if a two-piece
pantsuit is worn, the top of the scrub suit should be tucked into the pants.
o A clean surgical cap that covers the head.
o Clean, closed shoes that protect the feet from fluids or dropped items.
o Sterile (or high-level disinfected) surgical gloves, protective eyewear, and a mask
covering the mouth, nose, and any facial hair.
• Scrubbed staff should keep their arms and hands within the operative field at all times
and touch only sterile items or areas. Non-scrubbed staff should wear surgical attire,
including:
o Long sleeved jackets banded at the wrist and that are closed during use.

o A clean surgical cap that covers the head.
o Clean, closed shoes that protect the feet from fluids or dropped items.
o A mask covering the mouth, nose, and any facial hair.
• Non-scrubbed staff should stay at the periphery of the operating room, keeping their
distance from sterile areas. They should not lean or reach over the operative field.
• Clean accidental spills or contaminated debris in areas outside the surgical field with a
0.5% chlorine solution as promptly as possible (a non-scrubbed staff member wearing
utility gloves should do this).
C. After Surgical Procedures
Non-scrubbed staff wearing utility gloves should:
• Collect all waste and remove it from the room in closed leak-proof containers.
• Close and remove puncture-resistant containers when they are three-quarters full.
• Remove covered containers with a 0.5% chlorine solution with instruments and
surgical gloves from the room.
• Remove soiled linen in closed leak-proof containers.
• Remove waste, soiled linen, soiled instruments, and equipment and supplies that
have been opened but not used in an enclosed cart or in a leak-proof and covered waste
container. (Be sure that these items do not reenter the restricted area.)
Description of Central Sterile Supply Department in a Hospital
A CSSD consists of four areas, as shown in figure 12.2. These areas are:
1. The “dirty” receiving/cleanup area
2. The “clean” work area
3. The cleaning equipment storage area
4. The sterile or high-level disinfected storage area
Following surgery, place soiled instruments in their original sterile wrap and transport them to the
CSSD where they can be immediately cleaned before further processing.
Separate the “dirty” receiving/cleanup area (1) from the “clean” work area (2) with a physical barrier
(wall and door). If this is not possible, use a screen or paint a red line on the floor to designate
separation between the areas.
Note: Develop flow patterns to help ensure that contaminated items never come in contact with
clean, disinfected, or sterile items.
The function and equipment requirements for the four areas of a typical CSSD are summarized
below.

Figure 12.2. Floor plan for a CSSD in a hospital
Source: Tietjen, Bossemeyer, McIntosh 2003
“Dirty” Receiving/Cleanup Area (1)
In this area, soiled items are received, disassembled, washed, rinsed, and dried. Staff in the
receiving/cleanup area should wear plastic aprons, utility gloves, and safety goggles or face shields
to protect themselves from spills and splashes. The “dirty” receiving/cleanup area should have:
• Two sinks, if possible (one for cleaning with detergent and one for rinsing) with a
clean water supply
• A clean equipment counter for drying
“Clean” Work Area (2)
In the clean work area, cleaned items are:
• Inspected for flaws or damage
• Packaged (if indicated) and either sterilized or high-level disinfected
• Sent for storage as packaged or air dried and placed in a sterile or high-level
disinfected container
The clean work area should have:
• A large work table
• Shelves for holding clean and packaged items

• A high-pressure steam sterilizer, a dry-heat oven, a steamer, or a boiler
Staff entering the clean work area should wear clean cover gowns.
Clean Equipment Storage Area (3)
Store clean equipment in this area. The staff of the CSSD should enter the department through this
area. Equip the area with:
• Shelves (preferably enclosed) for storing clean equipment
• An office or desk for record keeping
Sterile or High-Level Disinfected Storage Area (4)
Store sterilized packs and covered sterile or high-level disinfected containers in this area. This
area should be separated from the central sterile supply area:
• Limit access to the storage area and/or store items in closed cabinets or shelves. (Shelves
or cabinets should be closed because they protect packs and containers from dust and
debris. Open shelves are acceptable only if the area has limited access and if
housekeeping and ventilation practices are controlled.)
• Keep the storage area clean, dry, dust-free, and lint-free by following a regular
housekeeping schedule.
• Packs and containers with sterile or high-level disinfected items should be stored 20 to
25 cm (8 to 10 inches) off the floor, 45 to 50 cm (18 to 20 inches) from the ceiling and
15 to 20 cm (6 to 8 inches) from an outside wall.
• Do not use cardboard boxes for storage. (Cardboard boxes shed dust and debris and
may harbor insects.)
• Date and rotate the supplies (first in, first out). This process serves as a reminder that
the package is susceptible to contamination and conserves storage space, but it does not
guarantee sterility.
• Packs will remain sterile as long as the integrity of the package is maintained.
• Sterile or high-level disinfected containers remain so up until they are opened.
• Dispense sterile and high-level disinfected articles from this area.
Shelf Life of Sterile Items
The shelf life of a packaged sterile item is event-related and not time-related.
• An event can compromise the integrity and effectiveness of the package.
• Events that can compromise or destroy package sterility include multiple handling,
loss of package integrity, moisture penetration, and airborne contamination.

• Sterility is lost when the package has tears in the wrapper, has become wet, has
been dropped on the floor, has dust on it, or is not sealed.
• The shelf life of a sterile package will depend on the quality of packing;
conditions during storage and transport; and the amount of handling before use.
• Sealing sterile packs in plastic bags can help prevent damage and contamination.
• Most contaminating events are related to excessive or improper handling of the
packages.
The ideal number of times an item should be handled is three:
1. When removing it from the sterilizer cart and placing it on a storage shelf.
2. When transporting it to the place where it is to be used.
3. When selecting it to be opened for use.
Handling and Transporting Instruments and Other Items
• Keep clean and high-level disinfected or sterile instruments and other items separate
from soiled equipment and waste items. Do not transport or store these items together.
• Transport high-level disinfected and sterile instruments and other items to the procedure
or operating room in a closed cart or container with a cover to prevent contamination.
• Remove supplies from all shipping cartons and boxes before bringing such supplies into
the procedure room, the operating room, or the clean work area of the CSSD. (Shipping
boxes shed dust and harbor insects that may contaminate these areas.)
• Transport soiled supplies and instruments to the receiving/cleanup area of the CSSD in
leak-proof and covered waste containers.
• Transport contaminated waste to the disposal site in leak-proof and covered waste
containers.
Note: If supplies are being delivered to the surgical area, one person standing outside should pass them
through the door to a person inside the operating room to reduce traffic.
SUMMARY
Irrespective of the existing layout of the facility, design traffic flow and work practices in such a
way that keeps soiled/contaminated instruments, equipment, and textiles separate from the clean
and sterile instruments, equipment, and textiles, whether in the operating rooms or in the CSSD.
Appropriate traffic flow and work practices prevent accidental contamination of clean items and
reduce the risk of infections to patients, HCWs, and visitors.

BIBLIOGRAPHY
CHAPTER 12: FACILITY DESIGN AND PATIENT FLOW
Russell, AD, Hugo, WB, & Ayliffe, GAJ, eds. 1999. Principles and practice of disinfection preservation and
sterilization (3. ed.). Oxford: Blackwell Scientific Ltd.
Spaulding, EH. 1968. Chemical disinfection of medical and surgical materials. In Lawrence, C, Block, SS,
eds. Disinfection, sterilization, and preservation. Philadelphia, PA: Lea & Febiger.
Tietjen, LG, Bossemeyer, D, McIntosh, N. 2003. Infection prevention: Guidelines for healthcare facilities
with limited resources. Baltimore, MD: Jhpiego. https://pdf.usaid.gov/pdf_docs/Pnact433.pdf.
World Health Organization, Regional Office for South-East Asia (SEARO). 1988. A manual on infection
control in health facilities. India, New Delhi: SEARO.
https://apps.who.int/iris/handle/10665/204733?show=full
World Health Organization (WHO) Regional Office for the Western Pacific. 2004. Practical guidelines for
infection control in health care facilities. Manila: WHO Regional Office for the Western Pacific.
https://apps.who.int/iris/handle/10665/206946

Chapter 13: Infection Prevention and Control Aspects of Occupational Health in Healthcare Settings 261
CHAPTER 13: INFECTION PREVENTION AND CONTROL
ASPECTS OF OCCUPATIONAL HEALTH IN HEALTHCARE
SETTINGS
Key Topics
• Hazard identification, risk assessment, and risk control
• Occupational health activities for the prevention and management of infections in HCWs
• Occupational health activities for the management of job-related illnesses and occupational exposures
• Prevention strategies for infections relevant to occupational health in healthcare facilities
• Occupational health activities for specific groups of HCWs
• Post-exposure prophylaxis for HIV and HBV
• Monitoring occupational health activities
BACKGROUND
Healthcare facilities around the world employ more than 59 million workers who are routinely
exposed to a variety of health and safety risks (WHO 2016a). These risks include exposure to
infectious agents, such as bloodborne pathogens, TB, viral respiratory infections, vaccine-
preventable diseases, bacterial infections, and gastrointestinal infections, among others. If an
infection is contracted as a result of an exposure to risk factors arising from workplace activity, it
is known as an occupational infection. In general, HCWs who have contact with patients, body
fluids, or specimens have a higher risk of acquiring or transmitting infections than those who have
casual contact with patients and the healthcare environment.
Occupational exposures to sharps injuries are an example of the substantial impact of occupational
infections among HCWs. It is estimated that 39% of HCV, 37% of HBV, and 4.4% of HIV
infections among HCWs worldwide are attributable to occupational exposure due to sharps injuries.
This amounts to an estimate of 16,000 HCV, 66,000 HBV, and 1,000 HIV occupational infections
annually (Prüss-Üstün Rapiti, Hutin 2005). It is thought that more than 90% of these are in limited-
resource countries (IFIC 2011).
It is notable that infection with HBV is 95% preventable with immunization, and the HBV vaccine
has contributed to a significant reduction of HBV in HCWs. However, fewer than 20% of HCWs
in some regions of the world have received all three doses of the vaccine needed for immunity from
HBV infection (APIC 2014a; IFIC 2003).
In general, occupational health deals with all aspects of work-related health and safety. It has a
strong focus on prevention, especially for infectious (such as disease exposures) and non-infectious
risks (such as injury). The goals of IPC intersect with those of occupational health in preventing and
addressing infectious hazards at healthcare facilities. Therefore, a large portion of occupational
health activities at a healthcare facility are also IPC activities (APIC 2014a).
Although the actual risk of infectious exposure for HCWs depends somewhat on the job description
and the setting, attention to IPC helps protect staff and patients in all settings. Emerging infectious
disease outbreaks, such as SARS in 2003, MERS-CoV in 2012, EVD in 2014, and COVID-19 have
highlighted the importance of IPC in protecting HCWs because transmission of these viruses to

HCWs occurred when they cared for infected patients. These outbreaks have demonstrated that
strategies to protect HCWs from exposure to infectious risks in the workplace are critically
important and that facilities must have the infrastructure in place to be able to adapt to changes in
emerging infectious threats. Healthcare facilities need staff knowledgeable in IPC to conduct and
support sound occupational health activities to minimize the risk of occupational infection in HCWs
and provide a safe environment for patients and staff (APIC 2014a; WHO 2016a; WHO 2016b) or
a perpetrator, if it is a case of sexual assault.
Hazard Identification, Risk Assessment, and Risk Control
Workplace hazard identification, assessment, and control is an ongoing process. It should be
undertaken at various times, including:
• If it has not been done before.
• When a hazard has been identified.
• When a change to the workplace may introduce or change a hazard, such as when
changes occur to the work equipment, practices, procedures, or the environment.
• As part of responding to a workplace incident, even where an injury has not occurred.
• When new information about a risk becomes available or concerns about a risk are
raised by workers.
• At regularly scheduled times appropriate to the workplace.
Hazard identification: This is the process of examining each work area and work task for the
purpose of identifying all the hazards that are “inherent in the job.” Work areas include but are not
limited to machine workshops, laboratories, office areas, agricultural and horticultural
environments, stores and transport, maintenance and grounds, reprographics, and lecture theaters
and teaching spaces. Tasks can include (but may not be limited to) using screen-based equipment,
audio and visual equipment, industrial equipment, hazardous substances and/or teaching/dealing
with people, driving a vehicle, dealing with emergency situations, and construction. This process is
about finding what could cause harm in a work task or area.
Risk assessment: Is defined as the process of assessing the risks associated with each hazard
identified so that the nature of the risk can be understood. This includes the nature of the harm that
may result from the hazard, the severity of that harm, and the likelihood of harm occurring.
Risk control: Taking actions to eliminate health and safety risks as is reasonably practicable. Where
risks cannot be eliminated, implementation of control measures is required to minimize risks as is
reasonably practicable. A hierarchy of controls has been developed and is described below to assist
in the selection of the most appropriate risk control measure/s.
Monitoring and review: This involves ongoing monitoring of the hazards identified, risks assessed,
and risk control processes, and reviewing them to make sure that they are working effectively.
Hazard identification, risk assessment, and risk control are an ongoing process. Therefore, regularly
review the effectiveness of your hazard assessment and control measures. Make sure that you

undertake a hazard and risk assessment when there is a change to the workplace, including when
work systems, tools, machinery, or equipment change. Provide additional supervision when new
employees with reduced skill levels or knowledge are introduced to the workplace. The
effectiveness of control measures can be checked through regular reviews and consultation with
workers.
Occupational Health Activities for Preventing Infections among HCWs
The goal of occupational health activities is to protect HCWs—and thereby their patients—from
acquiring an infection or any other hazard while working in a healthcare facility. This goal is
achieved by:
• Identifying work-related infection risks and hazards and preventing them.
• Ensuring prompt and appropriate management of any occupational exposures to
infections or other hazards.
• Training all HCWs on IPC and PS practices and how to protect themselves against the
risks of occupational exposures to infections and other hazards.
• Monitoring and investigating potentially harmful exposures and outbreaks among
HCWs.
• Preventing infections by carrying out occupational health activities (APIC 2014a; CDC
1998; WHO 2016b).
Protection from acquiring infections through occupational exposure is critical to maintaining and
retaining an adequate workforce of trained and healthy HCWs. Protecting HCWs also helps contain
costs associated with absenteeism, illness, and attrition as a result of incapacity, death, and fear. In
addition, occupational health activities protect patients through prevention, early identification, and
control of infections and other harms among staff. Therefore, protecting HCWs is integral to
maintaining a safe environment for both patients and staff.
Aspects of occupational health should be included in any IPC/PS program. WHO’s Core
Components of IPC (2016b) emphasize the importance of collaboration between occupational
health/employee safety activities and the IPC program (CDC 1998; WHO 2016a; WHO 2016b).
It is ideal to have an occupational health department and program in a larger healthcare facility,
depending on the size of the facility and available staffing. In smaller healthcare facilities, the IPC
team or other appropriate staff may carry out occupational health activities. All occupational health
programs should be coordinated and overseen by a trained healthcare professional or team who are
responsible for ensuring that all program activities, including IPC aspects, are conducted.
A responsible person from various departments, which could include human resources, IPC/PS,
outpatient clinics, administration, and the laboratory, should work in a coordinated manner to
implement occupational health activities, such as efficient and prompt screening, immunization, and
follow-up of exposures and outbreaks among HCWs.

Major Occupational Health Activities
The priorities of occupational health activities at any facility will vary depending on such factors as
the type of facility, organizational structure and services provided, geographic location,
characteristics of the patients and HCWs, and diseases that are endemic in the community (APIC
2014a). This section provides a practical description of the implementation and integration of
occupational health activities.
Activities that should be implemented by staff responsible for occupational health can be divided
into the following categories:
• For newly employed HCWs (table 13.1)
• For all HCWs on an ongoing basis (table 13.2)
• Facility-wide activities (table 13.3)
Table 13.3. Occupational health activities for newly employed HCWs
Activity Key occupational health activities for newly employed HCWs
Preemployment
evaluation
• Although not recommended in many settings, a baseline medical history and
physical examination, if done, can serve as a screening tool and establish a
baseline to determine if any future diseases are work-related.
• Review history of vaccination for HBV, in particular, and other vaccinations
recommended as per the national guidelines for vaccination of HCWs.
• Assess for immunity: In low-resource settings, documentation of routine
immunization might be the only source to verify immunity if the records are
available. Follow the national vaccination schedule for HCWs when vaccination
status is not known. In some settings, blood titers to determine current immunity to
vaccine preventable diseases may be available.
• Assess for presence of chronic and acute infections, including screening for TB.
Education/
training on IPC
• Tailor training to the needs of specific job functions.
• Conduct IPC training for newly employed HCWs following the national training
curriculum. At a minimum, all new employees should receive training in:
o Standard precautions and transmission-based precautions
o Management of occupational exposure to bloodborne pathogens
• Include such topics as risk and prevention of occupational infections, risk of infection
after exposures, and management of exposures, including availability and
effectiveness of PEP and potential consequences to family members of exposed
HCWs. Also include updates on occupational health and pregnant HCWs.
Counseling for
occupational
exposure to
infections
• Counsel for:
o The risk and prevention of occupational infection
o Risk of various infections following exposure
o Management of exposures, including testing and PEP (where indicated)
o Risks and benefits of PEP
o Long-term consequences of infections
o Potential risks for family members, colleagues, and other patients
o The need to be away from the job
• Female HCWs of childbearing age and those who are pregnant should be
counseled on the risks of infections and provided with information on appropriate
transmission-based precautions needed for infections of concern during pregnancy.
• Answer any other questions that the HCW might have.

Table 13.2. Occupational health activities for all HCWs
Activity Key occupational health activities for all HCWs
Monitoring
employee health
status
• Screen for TB using the WHO TB screening tool.
• Ensure that the vaccination status of all HCWs is up to date.
• Update employee health records.
• Perform routine monitoring of HCWs with HBV, HCV, and HIV infection with
the goal of assisting infected HCWs to continue to provide safe healthcare
to patients.
Education/training
on IPC
• Organize periodic refresher training for all HCWs in key IPC practices.
• Provide updates on guidelines for monitoring and managing occupational
exposures to bloodborne pathogens and other infections.
Determining work
restrictions for
employee illness
and exposure
• Make decisions about work restrictions (the need to be away from the job)
for ill HCWs. (See Appendix 13A and 13L for disease-specific work
restrictions.)
Post-exposure
follow-up
• Follow up immediately those HCWs with job-related exposures and make
decisions about work restrictions and post-exposure care. (See Appendix
13 E, 13F, and 13G for disease-specific work restrictions.) See the
Occupational Health Activities for Management of Job-Related Illnesses
and Occupational Exposures section in this chapter.
Vaccination • Organize vaccination sessions for those staff who need to complete
vaccinations according to national/facility recommendations.
Table 13.3. Facility-wide activities
Activity Key occupational health facility-wide activities
Exposure reporting • Conduct a regular review of occupational exposure reporting in the facility.
• Ensure that round-the-clock services are available for post-exposure
management as recommended in Volume 1, Chapter 6: Sharps Injuries and
Management of Exposure to Bloodborne Pathogens.
• Prepare and transmit documentation of occupational exposures to the
authorities, as needed.
Occupational
health program
review
• Evaluate the effectiveness of occupational health activities for preventing
occupational exposure to bloodborne pathogens and other risks.
• Make changes in the selection and implementation of occupational health
program activities, as needed.
National guidelines, if available, should be followed to vaccinate HCWs against vaccine-
preventable diseases. WHO has provided information on immunizations for the general population
and HCWs (table 13.4) to help develop national policies for the vaccination of HCWs.

Table 13.4. WHO-recommended immunizations for HCWs
Vaccine Recommendations
HBV • Routine childhood immunization. No booster needed.
• Incompletely vaccinated HCWs should receive additional doses to complete the
vaccine series. The vaccine series does not need to be restarted; however,
minimum dosing intervals should be followed: 4 weeks between the first and
second dose, 8 weeks between the second and third dose, and 16 weeks
between the first and third dose (CDC 2013).
• HBV vaccine is affordable and available in many settings and is an appropriate
place to begin when starting a staff immunization program (CDC 1998).
Polio • Routine childhood immunization.
• All HCWs should have completed a full course of primary vaccination against
polio.
Diphtheria • Routine childhood immunization.
• Booster for HCWs every 10 years.
Measles • Routine childhood immunization.
• If required by the national policy, all HCWs should produce proof of immunity or
documentation of immunization at the time of employment.
Rubella • If rubella vaccine has been introduced in the national program, all HCWs should
be immunized for rubella and produce proof of immunity or documentation of
immunization at the time of employment.
Meningococcal • One booster dose 3–5 years after the primary dose may be given to persons
considered to be at continued risk of exposure, including HCWs.
Influenza • Influenza virus changes regularly, therefore, annual immunization with a single
dose is recommended if the vaccine is available for HCWs under the national
immunization program.
Varicella
(Chicken pox)
• Countries should consider vaccination of potentially susceptible HCWs (i.e.,
unvaccinated and with no history of varicella) with two doses of varicella
vaccine.
Immunizations with NO current WHO recommendation for HCWs
There are no specific recommendations for vaccination specifically for HCWs for TB, pertussis, tetanus,
mumps, HAV, typhoid, or cholera. These vaccines should be offered as a part of routine vaccination
programs and as overall strategies for preventing outbreaks (typhoid and cholera).
Adapted from: WHO 2015
Occupational Health Activities for Management of Job-Related Illnesses and
Occupational Exposures
The occupational health team should respond immediately to all potential and confirmed exposures
to bloodborne pathogens and other infectious diseases, and collaborate with IPC staff for follow-
up, as necessary. Healthcare facilities should have systems in place for HCWs to report sharps
injuries and bloodborne pathogen exposures with prompt evaluation and follow-up (table 13.5).

Table 13.5. Occupational health activities for the management of job-related illnesses and exposures
Activity Key occupational health activities: Job-related illnesses and exposures
Infectious
disease in
HCWs
• Identify infections in HCWs (whether community-acquired or job-related).
• Make decisions about the length and type of work restrictions (related to patient
care or food handling) and assignment to other duties (see Appendix 13L).
• Report to public health authorities if it is a notifiable disease of public health
interest.
Sentinel
infections in
HCWs
• Suspect a job-related infection in an HCW with an infectious disease known to
spread in healthcare facilities. Certain occupational infections may be the result of
caring for patients with an unidentified infection (such as meningococcal meningitis
or novel influenza) or may indicate IPC lapses at the facility. (See Appendix 13L
for disease-specific risk of transmission to and from HCWs.)
• Ensure that infections are managed following clinical guidelines and make
decisions about the length and type of work restrictions (as above).
• Take necessary measures to prevent further spread of the infection through
investigation of possible routes of transmission in the facility and correct any
lapses in IPC.
• Identify and facilitate clinical management and work restrictions of those exposed.
• Monitor closely for additional cases (indicating a hospital or community outbreak).
Post-exposure
follow-up
• Determine what is considered an exposure (exposure definition).
• Obtain a list of those who have been exposed.
• Counsel those exposed.
• Offer PEP promptly when appropriate and available.
• Determine any work restrictions.
• Conduct medical surveillance for development of disease.
• Determine when the HCW can return to work.
• Maintain adequate and confidential documentation on the event.
• Coordinate all of the above and any other activities, such as ongoing monitoring or
follow-up lab testing.
• (See Volume 1, Chapter 6: Sharps Injuries and Management of Exposure to
Bloodborne Pathogens, for more information on post-exposure management for
HBV, HCV, and HIV. See Appendix 13A for disease-specific guidance for
management of exposed HCWs.)
Summary of Key Elements of Occupational Health Activities
The following are the key elements for occupational health programs in healthcare facilities:
• Oversight by a qualified healthcare professional or team
• Coordination among multiple hospital departments
• Medical evaluation at the start of employment
• Health and safety education and training of all staff
• Immunization programs

• Management of work restrictions and post-exposure treatment for occupational illnesses
and exposures
• Counseling on protection from and management of accidental exposure to bloodborne
and other infectious pathogens
• Maintenance of personnel health records
(APIC 2014a; CDC 1998; WHO 2002)
Prevention Strategies for Infections Relevant To Occupational Health in
Healthcare Facilities
Prevent occupational exposure of HCWs by the application of standard precautions for all
patients, at all times, and disease- or syndrome-specific transmission-based precautions to prevent
exposure to infectious agents.
Protect against vaccine-preventable diseases: Having a mandatory program that requires all
HCWs to receive vaccines to protect themselves against vaccine-preventable diseases has been
found to be more effective than a voluntary program in ensuring that all susceptible staff are
vaccinated. In settings with limited resources, priority should be given to staff who are at high risk
of exposure and those without any existing immunity. Select the vaccines that may provide the most
protective effects, such as HBV or influenza.
Manage occupational exposures following the national guidelines (e.g., national guidelines for
the management of occupational exposure to blood and body fluids) (Refer to Chapter 6, Sharps
Injuries and Management of Exposure to Bloodborne Pathogens, in this volume for post-exposure
management of HBV, HCV, and HIV, and to Appendix 13A for disease-specific guidance for the
management of exposed HCWs.). Also refer to requirements for site level PEP service delivery in
Appendix 13J.
Keep up to date by seeking additional information on specific diseases and local epidemiology.
Occupational Health Activities for Specific Groups of HCWs
Certain groups of workers at a healthcare facility may require special attention related to
occupational health activities. They include pregnant staff, laboratory staff, emergency response
staff, and HCWs infected with HIV, HBV, or HCV.
Pregnant HCWs
Pregnancy does not increase the risk of acquisition of infection for most occupationally-acquired
infections, and clinical manifestations are no more severe in pregnant women than in others (APIC
2014b). However, pregnant HCWs may be anxious about potential infection and possible harm to
their babies. The staff supporting occupational health activities should address any questions that
pregnant HCWs may have about occupational exposures, how to avoid them, the management of
exposures, and any implications for the baby. Full compliance with standard precautions, such as
hand hygiene and appropriate PPE, and adherence to transmission-based precautions should be

adequate for pregnant HCWs in preventing most infectious diseases, and adherence to transmission-
based precautions should be adequate for pregnant HCWs in preventing most infectious diseases
(table 13.6).
However, as in the case of non-pregnant HCWs, non-immune pregnant HCWs should not care for
patients with measles, rubella, and varicella (APIC 2014b). Table 13.7 provides information on
occupational exposure to infection among pregnant HCWs, risks to their babies, and prevention
strategies. The information provided in the table will guide the occupational health team members
in making appropriate decisions. Table 13.7 also describes additional pertinent facts to assist with
management of relevant occupational exposures in pregnant HCWs.
Table 13.6. Infectious agents of concern for pregnant HCWs according to the risk of transmission
associated with providing healthcare services and available preventive measures
Healthcare-
associated
acquisition possible
and prevented by
vaccine
Healthcare-
associated
acquisition Is
unlikely
HAIs for which standard
and transmission-based
precautions are the only
preventive measures
HAIs for which PEP Is
effective
Anthrax, HAV, HBV,
influenza, Neisseria
meningitis, pertussis,
rubella, measles,
varicella, tetanus,
diphtheria
Herpes simplex
virus,
toxoplasmosis
Cytomegalovirus (CMV),
VHF, HCV, parvovirus B19,
TB
HIV, N. meningitis,
syphilis
In settings where adequate infection control precautions (including PPE) are available and
immunizations for vaccine-preventable diseases are maintained, there are few instances in which
pregnant HCWs cannot provide the same care as their non-pregnant colleagues; they should not
routinely be restricted from duties on the basis of pregnancy status. However, pregnant HCWs
should not care for patients with parvovirus B16 and certain vaccine-preventable diseases if they
are non-immune. At times of PPE and vaccine shortage, assign pregnant HCWs to other tasks with
no risk for exposure to infectious agents (APIC 2014b; CDC 2013).

Table 13.7. Management of occupational exposure to common infections for pregnant staff members
Agent In-hospital source Potential effect on the
fetus
Rate of perinatal
transmission
Maternal
screening
Prevention
CMV Urine, blood, semen,
vaginal secretion,
immunosuppressed
transplant, dialysis,
day care
Classic cytomegalic
inclusion disease
(5–10%)*
Hearing loss
(10–15%)
Primary infection
(25–50%)
Recurrent infants
(52%)
Symptomatic
(< 5–15%)
Routine
screening not
recommended;
antibody is
incompletely
protective
Efficacy of CMV immune globulin
not established.
No vaccine available
Standard precautions
HAV Feces (most
common), blood
(rare)
No fetal transmission
described;
transmission can occur
at the time of delivery if
the mother is still in the
infectious phase and
can cause hepatitis
None Routine
screening not
recommended
Vaccine is a killed viral vaccine and
can safely be used in pregnancy.
Contact precautions during acute
phase.
The safety of HAV vaccination
during pregnancy has not been
determined; however, because the
vaccine is produced from
inactivated HAV, the theoretical
risk to the developing fetus is
expected to be low. The risk
associated with vaccination,
however, should be weighed
against the risk for HAV in women
who might be at high risk of
exposure to HAV.
HBV Blood, body fluids,
vaginal secretions,
semen
Hepatitis, early onset
hepatocellular
carcinoma
HBsAg + 10%
HBeAg + 90%
Routine HbsAg
testing advised
HBV vaccine during pregnancy
Neonate: HBIG plus vaccine at
birth

fetus
Rate of perinatal
transmission
Maternal
screening
Prevention
HCV Blood, sexual Hepatitis 5% (0–25%) Routine
screening not
recommended
No vaccine or immunoglobulin
available; post-exposure treatment
with antiviral agents being
investigated.
Herpes
simplex virus
Vesicular fluid,
oropharyngeal, and
vaginal secretions
Sepsis, encephalitis,
meningitis,
mucocutaneous
lesions, congenital
malformation (rare)
Primary genital
(33–50%)
Recurrent genital
(1–2%)
Antibody testing
minimally useful,
genital
inspection for
lesions if in labor
Chemoprophylaxis at 36 weeks
decreases shedding
HIV Blood, body fluids No congenital
syndrome; if fetus
infected, AIDS in 2–4
years
Depends on HIV
viral titer and use of
ART
If titer < 1,000 virus;
rate 2%
If titer ≥ 10,000; rate
up to 25%
Routine maternal
screening
advised.
If exposed,
testing at 3, 6,
and 12 months
Antiretroviral chemoprophylxis
available for exposures,
postnatal/breastfeeding
chemoprophylaxis for HIV+
mothers and their infants.
Influenza Sneezing and
coughing, respiratory
tract secretions
No congenital
syndrome: influenza in
mother could cause
hypoxia in fetus
Rare None Non-live vaccine (such as trivalent
inactivated) for all pregnant HCW
during influenza season
Droplet precautions
Measles
(rubeola)
Respiratory secretion,
coughing
Prematurity,
spontaneous abortion,
no congenital
syndrome
Rare Antibody test Vaccine contraindicated during
pregnancy. Vaccination
recommended before conception.
Airborne precautions

fetus
Rate of perinatal
transmission
Maternal
screening
Prevention
Neisseria
meningitidis
Respiratory secretion
of untreated patients
or those patients who
have received
antimicrobials for
< 24 hours
Sepsis
No congenital
syndrome
Unknown None Chemoprophylaxis with ceftriaxone
or azithromycin.
Vaccine if indicated for outbreak
control.
Droplet precautions, based on
syndrome and for confirmed cases.
Standard precautions, especially
mask, face protection for all
intubations.
Rubella Respiratory
secretions
Congenital syndrome 90% in first
trimester
40–50% overall
Routine rubella
IgG testing in
pregnancy
Preconception
screening
recommended
Vaccine contraindicated during
pregnancy. Vaccine before
conception.
No congenital rubella syndrome
described for vaccine.
Droplet precautions; contact
precautions for contact with
congenital rubella patients.
Syphilis Blood, lesion, fluid,
amniotic fluid
Congenital syndrome Variable 10%–90%,
depends on stage
of maternal disease
and trimester of the
infection
VDRL RPR
FTA-ABS
PEP with penicillin
Standard precautions, gloves until
24 hours of effective therapy
completed for infants with
congenital syphilis and all patients
with skin and mucous membrane
lesions.

fetus
Rate of perinatal
transmission
Maternal
screening
Prevention
Tuberculosis Sputum, skin lesions Neonatal TB; liver most
frequently infected
Rare TB skin test
Interferon
gamma-release
assay blood test;
if available.
Chest
radiograph
Post-exposure prevention
recommendations vary with
tuberculin skin test reaction size
and chest radiograph result.
Airborne precautions
Varicella-
zoster
Droplet or airborne
spread of vesicle fluid
or secretions of the
respiratory tract
(scabs are not
infective)
Malformations (skin,
limb, central nervous
system, eye); chicken
pox
Total 25%:
congenital
syndrome
(0–4%)
Antibody Vaccine contraindicated during
pregnancy. Vaccine before
conception.
Varicella-zoster immune globulin
within 96 hours’ exposure if
susceptible.
Airborne and contact precautions
*Congenital syndrome: varying combinations of jaundice, hepatosplenomegaly, microcephaly, thrombocytopenia, anemia, retinopathy, and skin and bone lesions.
FTA-ABS = fluorescent treponemal absorption test; HBsAg=hepatitis B surface antigen; HBeAg=hepatitis B e-antigen; HBIG=hepatitis B immune globulin;
IgG=immunoglobulin G; RPR= apid plasma reagin test; VDRL=Venereal Disease Research Laboratory test
Adapted from : APIC 2014b

Laboratory Staff
HCWs in laboratories may be at increased risk of occupational exposure to the pathogens with
which they work. Laboratory staff should receive specific training on the risks and how to avoid
them (such as working under a biocontainment hood, using a closed centrifuge, avoiding mouth
pipetting) and have access to PPE, as required, according to the procedures they perform and the
pathogens with which they have contact. (Volume 2, Section 4, Chapter 3, Clinical Laboratory
Services, provides details on preventing infection among laboratory staff.) In addition to the
vaccines routinely recommended for all HCWs, further vaccinations may be appropriate for HCWs
working in a clinical or research laboratory (CDC 1998). National recommendations should be
consulted and followed, if available.
The following vaccines may be relevant for staff working with specific pathogens:
• BCG (Mycobacterium tuberculosis)
• HAV, Meningococcal (N. meningitidis)
• Polio, rabies
• Typhoid
(CDC 1998)
Emergency Response Staff
HCWs who respond to emergencies and transport patients should not be overlooked during
occupational health activities. These HCWs are at a high risk of exposure to bloodborne pathogens
and should have access to HBV vaccination, have adequate PPE and thorough instruction on proper
PPE use, and be taught to apply standard precautions for all patients at all times. Moreover, they
may transport patients before the infection status of a patient is known (e.g., meningococcal
meningitis, influenza, novel respiratory viruses, VHF) and, therefore, should be aware of how to
apply isolation precautions based on disease syndromes, be informed about patients who later
develop infections of occupational health concern, and be included in exposure follow-up and
relevant PEP and work restrictions.
HCWs Exposed to HIV and/or HBV or HCV
HIV, HBV, and HCV are the primary infectious agents that can be transmitted via exposure to body
fluids. In addition to percutaneous injury, contact of mucous membranes or non-intact skin with
blood, fluids containing blood, tissue, or other potentially infectious body fluids pose an infectious
risk. Potentially infectious body fluids include semen, vaginal secretions, cerebrospinal fluid,
synovial fluid, pleural fluid, peritoneal fluid, pericardial fluid, amniotic fluid, pus, etc. In this case,
body fluids, such as feces, nasal secretions, saliva, sputum, sweat, tears, urine, and vomit, are not
considered infectious unless they contain blood.
PEP is a preventive medical treatment that a person may take following exposure to potentially
infectious bloodborne pathogens, such as HIV or HBV, to prevent becoming infected from the

exposure. PEP can also be taken following exposure to non-bloodborne pathogens, such as invasive
Group A streptococcal infections, invasive meningococcal infections, and pertussis.
Occupational exposure is exposure of individuals to HIV and other bloodborne pathogens occurring
in the course of their work. This exposure should not be assumed to be directed solely to HCWs but
also to other workers, such as emergency rescue staff, waste-disposal workers, law enforcement
personnel, and firefighters because these staff are also likely to be exposed to health risks from
pathogens in blood and other potentially infectious body fluids while doing their work.
Occupational exposure to blood and body fluids is the exposure of an HCW to blood or other
potentially infectious materials during the performance of an employee's duties. Exposure to
bloodborne pathogens involves the skin, eyes, mucous membranes, or parenteral contact (e.g., a
needle stick).
Non-occupational exposure is an exposure to HIV and other bloodborne pathogens outside the work
setting. This term predominantly refers to potential exposure through sexual assault. Other forms of
potential non-occupational exposure include those arising from needle sharing among injecting drug
users, consensual sex, needle sticks in the community, fights or playground incidents resulting in
bleeding by an HIV-infected child, and mass causalities, such as road traffic accidents, etc.
PEP for HIV
Occupational Exposure to HIV
Each day, thousands of people around the world experience accidental exposure to blood and other
body fluids or tissues while performing their work duties. It could therefore be said that HCWs are
especially vulnerable for infections. The risk of acquiring HIV after a mucous membrane exposure
to blood is approximately 0.09%, whereas acquisition through a percutaneous exposure is
approximately 0.3% (Cardo et al. 1997). The risk of acquiring HIV percutaneous is associated
with deeper injuries, visibly bloody devices, and more advanced disease (likely due to a higher viral
load) in the source patient. Hollow bore needle exposures have higher risk of transmission than that
of solid bore needle exposures.
The use of PEP against HIV infection dates back to the early 1990s when both direct and indirect
evidence suggested that treatment with antiretrovirals (ARVs) soon after exposure to HIV decreases
the risk of transmission (WHO, 2014a).
A retrospective case-control study demonstrated that PEP with zidovudine (AZT) for four weeks
was associated with an 81% reduction in the transmission of HIV in humans. In that study,
approximately 70% of patients received AZT within four hours of the exposure (Cardo 1997). It is
not known how long after an exposure PEP would be ineffective. However, the data from the animal
studies mentioned above suggest that PEP is effective when initiated within 72 hours of exposure.
Taking the evidence mentioned above into consideration, most international guidelines recommend
PEP drugs be started for exposed persons (based on the indication) as early as possible, preferably
within two hours of exposure; however, giving PEP drugs after 72 hours of exposure is not
generally advisable. Measures that should be taken on initial management of exposure exposed
persons are put in Appendix 13A.

The PEP drug recommendations for percutaneous injury and mucous membrane or non-intact skin
exposure are found in tables 13.8 and 13.9.
Table 13.8. Recommended HIV PEP for percutaneous injuries
Status code (SC) Exposure code (EC)
EC 2 EC 3
SC 1 Recommend basic 2-drug PEP Recommend expanded 3-drug PEP
SC 2 Recommend expanded 3-drug PEP Recommend expanded 3-drug PEP
SC unknown Generally, no PEP is warranted;
however, consider basic 2-drug PEP
for source with HIV risk factors.
Generally, no PEP is warranted;
for source with HIV risk factors
HIV-negative No PEP warranted No PEP warranted
Table 13.9. Recommended HIV PEP for mucous membrane exposures and non-intact skin exposures
Status code (SC) Exposure code (EC)
EC 2 EC 3
SC 1 Consider basic 2-drug PEP Recommend basic 2-drug PEP
SC 2 Recommend basic 2-drug PEP Recommend expanded 3-drug PEP
SC unknown Generally, no PEP warranted; if PEP is
offered and administered and the
source is later determined to be HIV-
negative, PEP should be discontinued
Generally, no PEP warranted;
for source with HIV risk factors
HIV-negative No PEP warranted No PEP warranted
Adapted from: CDC 2005a
Adherence
Compliance rates of 95% or greater are required to actually maximize the benefits of ART. Although
parallel data are not available for PEP, the magnitude of the positive effects of high levels of
adherence to prescribed practices is generally assumed to be similar.
Non-Occupational Exposure to HIV
The risk of HIV transmission per-contact from sexual exposure varies according to the nature of
the exposure. The estimated risk is 1% to 30% with receptive anal intercourse; 0.1% to 10.0% with
insertive anal intercourse and receptive vaginal intercourse; and 0.1% to 1.0% with insertive
vaginal intercourse (Boily et al. 2009). Compared with other forms of intercourse, oral intercourse
is considered to pose a lower risk of HIV transmission, although good risk estimates are lacking
and there are case reports of HIV infections in people in whom the only reported risk factor was
oral intercourse (Lifson et al. 1990).
Evaluation of Persons Seeking Care after Potential Non-Occupational Exposure to HIV
When deciding whether to recommend the initiation of PEP, the clinician should assess and
carefully weigh the factors shown in box 13.1.

Box 13.1: Elements of assessment to determine whether PEP is indicated
Risk Behavior*:
Did exposure to potentially HIV-infected blood or body fluid occur?
If yes, was the exposure an isolated or episodic event, or the result of habitual behavior?
Degree of Transmission Risk Based on Type of Exposure:
What was the route of exposure?
Are factors present that are known to further increase transmission risk?
Exposure Source:
Is the source known to be HIV infected? **
If HIV status of the source is unknown, what is the likelihood of the source being HIV infected?
* Assessment of the behavioral factors and circumstances that led to HIV exposure includes emotional, psychological,
and social factors that contribute to risk behavior, such as depression, history of sexual abuse, and drug and alcohol
use.
**If the source is known to be HIV infected, information about his/her CD4 count, viral load, ARV medication history,
and history of ARV drug resistance should be obtained, when possible, to assist in the selection of a PEP regimen.
Table 13.10. Considerations of non-occupational PEP according to the type of risk exposure
Types of exposures that do not warrant
PEP
Types of exposures that should prompt
considerations of PEP
• Human bites not involved with blood
• Exposure to sharps and needles not in
contact with an HIV infected or at risk
person
• Mutual masturbation without skin break.
Oral-anal contact
• Receptive penile–oral contact without
ejaculation
• Insertive penile-oral contact
• Oral-vaginal contact without blood
exposure
• Unprotected receptive and insertive vaginal or anal
intercourse with a source that is HIV infected or at
risk for HIV infection
• Unprotected receptive penile-oral contact with
ejaculation with a source that is HIV infected or at
risk of HIV infection
• Oral-vaginal contact with blood exposure
• Needle sharing with a source known to be HIV
infected or at risk for HIV infection
• Injuries with exposure to blood from a source
known to be HIV infected or at risk for HIV infection
(including needle sticks, human bites, and
accidents)
This risk estimate considers many factors, including source viral load, presence of sexually transmitted
infections, and presence of ejaculates. It is prudent to recommend PEP for receptive oral sex with
ejaculation, although discussion about the conflicting data should occur.
Source: CDC 2018
Exposure to Hepatitis B Virus
HBV infection is a well-recognized occupational risk for HCP (CDC 2018). The risk of HBV
infection is primarily related to the degree of contact with blood in the workplace and also to
hepatitis B e antigen (HBeAg) status of the source person. In studies of health care providers (HCPs)

who sustained injuries from needles contaminated with blood containing HBV, the risk of
developing clinical hepatitis, if the blood was both hepatitis B surface antigen (HBsAg) and
HBeAg-positive was 22% to 31%; the risk of developing serologic evidence of HBV infection was
37% to 62%. By comparison, the risk of developing clinical hepatitis from a needle contaminated
with HBsAg-positive, HBeAg-negative blood was 1% to 6%, whereas the risk of developing
serologic evidence of HBV infection was 23% to 37% (Werner et al. 2013).
Table 13.11. Recommended PEP for exposure to HBV
Vaccination and
antibody response
status
of exposed workers*
Treatment
Source
HBsAg positive
Source
HBsAg
negative
Source unknown
not available for
testing
Unvaccinated HBIG§ x 1 and initiate HB
vaccine series
Initiate HB
vaccine series
Initiate HB vaccine series
Previously vaccinated
Known responder** No treatment No treatment No treatment
Non responder† HBIG x 1 and initiate
revaccination source, or
HBIG x 2 §§
No treatment If known high risk, treat
as if source were HBsAg
positive
Antibody
response unknown
Test exposed person for
HBsab
1. If adequate**, no
treatment is necessary
2. If inadequate, administer
HBIG x 1 vaccine booster
No treatment Test exposed person for
HBsab
1. If adequate**, no
treatment is
necessary
2. If inadequate†,
administer vaccine and
booster and recheck titer
in 1 to 2 months
* Persons who have previously been infected with HBV are immune to reinfection and do not require PEP.
† Hepatitis B surface antigen.
§ Hepatitis B immune globulin; dose is 0.06 ml”kg intramuscularly.
¶ Antibody to HBsAg.
**A responder is a person with adequate levels of serum antibody to HBsAg (i.e., anti-HBs >10 mlU/ml).
†† A non-responder is a person with inadequate response to vaccination (i.e., serum anti-HBs < lO mlU/ml).
§§ The option of giving one dose of HBIG and reinitiating the vaccine series are preferred for non-responders who
have not completed a second 3-dose vaccine series. For persons who previously completed a second vaccine series
but failed to respond, two doses of HBIG are preferred.
Source: CDC 2001
It is recommended that HCWs should be vaccinated for HBV.

Exposure to Hepatitis C Virus
The risk of HCV transmission from a percutaneous exposure is approximately 1.8% (Lanphear et
al. 1994). HCV is rarely transmitted from mucous membrane exposure to blood and it has never
been documented as occurring as a consequence of a blood exposure to intact or non-intact skin.
Therefore, there is no known PEP to HCV exposure. Nevertheless, a 2001 New England Journal
of Medicine study found that treatment of patients with acute HCV with interferon alpha-2b led to
resolution of HCV viremia in 98% of patients (Jaeckel et al. 2001).
The CDC recommends follow-up testing for an exposure to HCV with anti-HCV antibody
testing within four to six months. A positive antibody test should prompt HCV viral load and liver
function tests. Once exposure is confirmed, the management and follow-up of non-occupational
HCV exposure is similar to that of the occupational exposure.
Post-Exposure Management Steps (HBV, HCV, and HIV)
The aim of post-exposure reporting and follow-up is to start PEP as soon as possible, within 72
hours of exposure, if indicated. The key components of managing occupational exposure to
bloodborne pathogens are described below.
STEP 1 Time frame – immediately, within 30 minutes. Person responsible: Exposed HCW.
Provide immediate care to the exposure site:
• Wash the exposed skin and any wound with soap and water.
• Mucous membranes with water for 15 minutes.
• DO NOT use any antiseptic or caustic agents, such as bleach.
After washing, immediately report the event to the person in charge of PEP
management. The information reported should include identification of the exposed
person, date and time of exposure, type of fluid and nature of exposure, and details
about the source person as recommended by national PEP guidelines.
STEP 2 Time frame – immediately after reporting. Person responsible: Physician, in-Charge of
PEP management determines the risk associated with exposure (-) by:
• Type of fluid (e.g., blood, visibly bloody fluid, other potentially infectious fluid
or tissue)
• Type of exposure (e.g., sharps injury, mucous membrane or non-intact skin
exposure, bites resulting in direct contact with infected blood) (CDC 2001).
• Infectious status of source (presence of HBSAg, HCV antibody, or HIV
antibody)
• Susceptibility of exposed person (hepatitis B vaccine and vaccine response
status, HBV, HCV immune status)

Table 13.12. HIV exposure risk and type of exposure
Risk Type of Exposure
Low-risk
exposure
• Exposure to a small volume of blood or blood-contaminated fluids from asymptomatic HIV-
positive patients
• Following an injury with a solid needle
• Any superficial injury or mucocutaneous exposure
High-risk
exposure
• Exposure to a large volume of blood or potentially infectious fluids or blood-contaminated
fluid
• Exposure to blood or body fluid from a patient with clinical AIDS or early seroconversion
phase of HIV
• Injury with a hollow needle and/or deep and extensive injuries
Source: Curless 2018
STEP 3 Time frames – as soon as possible, preferably within 24 hours. Person responsible:
Physician, in-Charge of PEP management, HCW.
Evaluate the exposed HCW:
• Check history of hepatitis B vaccination (currently there is no vaccine for
hepatitis C or HIV).
• Determine immune and infection status of the exposed HCW.
For HBV, if not conducted previously, measure total HBV core antibodies (anti-HBc)
and HBV surface antibodies (anti-HBs)
For HCV, test for HCV antibodies (anti-HCV—a positive test means current or past
infection) and ALT (alanine aminotransferase).
If test is positive, test for viremia to confirm current infections.
For HIV, check status and history of previous HIV testing:
• Provide HIV pretest counseling.
• Offer HIV testing if the exposed HCW provides informed consent.
• Offer HIV post-test counseling per the national counseling and testing
guidelines.
• Refer to HIV care and treatment for those who test positive.
STEP 4 Time frame – as soon as possible, preferably within 24 hours, simultaneously with Step
3 above. Person responsible: In-Charge of PEP management, patient’s treating physician.
Evaluate the exposure source:
• Obtain detailed information on clinical status of the source person.
• Determine vaccination and immune status of the source person:
o Test known source person for HBsAg.
o Test known source person for anti-HCV antibodies.

o Check known source person for HIV status and history of previous HIV testing.
o Conduct clinical assessment of known source person for HIV/AIDS.
o Provide HIV pretest counseling.
o Conduct HIV testing if the source person provides informed consent.
o Offer HIV post-test counseling per the national counseling and testing guidelines.
o Refer to HIV care and treatment for those who test positive.
Determinants of PEP for occupational exposure to HBV are described in table 13.13.
Table 13.13. Determinants of PEP for occupational exposure to HBV
Vaccination and
antibody response
status of exposed
HCW
Treatment
Source HBsAga
positive
Source HBsAg negative Source unknown or not
available for testing
Previously
vaccinated
No treatment No treatment No treatment
Unvaccinated HBIGb single dose and
full HB vaccination
Full HB vaccination Full HB vaccination
Known responders No treatment No treatment No treatment
Known non-
responderd
HBIG single dose and
revaccination or
second dose of HBIG
No treatment If known high-risk source,
manage as if source were
HBsAg positive
Antibody response
unknown
Test exposed person
for anti-HBse:
If adequate level, no
treatment is
necessary;
if inadequate level,
HBIG single dose and
HB vaccine booster
No treatment Test exposed person for anti-
HBs:
If adequate, no treatment is
necessary;
if inadequate, vaccine booster
and check titer in 1–2 months
a
HBsAg: hepatitis B surface antigen
b
HBIG: hepatitis B immunoglobulin
c
Known responder: a person who has an adequate level of serum antibody (anti-HBs ≥ 10 mIU/mL)
d
Known non-responder: a person with inadequate response to vaccination (anti-HBs < 10 mIU/mL)
e
Anti-HBs: hepatitis B surface antibody
Source: CDC 2001
STEP 5 Time frame – as soon as test results return (if any), must be within 72 hours from
exposure. Person responsible: Physician, In-Charge of PEP management, HCW.
Establish eligibility for PEP:
Refer to table 13.13 to determine the PEP required for HBV exposure.
Parenteral or mucous membrane exposure (e.g., sexual exposure, splashes to the eye,
nose, or oral cavity).

Exposure to blood, blood-stained saliva, breast milk, genital secretions, or
cerebrospinal, amniotic, peritoneal, synovial, pericardial, or pleural fluids.
PEP is not indicated if:
• The exposed HCW is known to be HIV-positive.
• The source person is HIV-negative.
• Exposure is limited to intact skin.
Testing the source person and the exposed HCW is helpful but it is not mandatory to
have either test results to initiate HIV PEP. The decision is sometimes based on an
individual’s level of concern and the background HIV prevalence.
STEP 6 Prescribe PEP: Time frame: initiate PEP as early as possible but within 72 hours.
• Continue ARVs for HIV for 28 days.
• Continue HBV vaccine schedule over six months.
• Provide adherence counseling and address any drug interactions.
• Follow national guidelines or WHO recommendations for PEP
STEP 7 Time frame - 72 hours – 6 months after exposure. Person responsible: Physician, In
Charge of PEP Management, HCW.
Follow-up:
• Provide follow-up for adherence and any side effects of ARVs and address questions
that the individual may have.
• Arrange for an HIV test at three months after the exposure.
• Arrange for HBV vaccine at 1 and 6 months, if indicated.
• Link HIV care and treatment, including prevention measure for protecting others, in
case the HIV test results are positive.
• Provide additional counseling and other preventive interventions, as needed, and if test
results are negative.
Document all PEP provided, following facility and national guidelines.
Monitor PEP provision in the facility.
Exposed HCWs who have already started PEP but did not come to the ART clinic on the follow-up
appointment date can be traced by giving a telephone call (or physically for those in the same health
facility, if possible) to remind them to come to the follow-up visit. The service given at each follow-
up visit should be documented on potential exposure, and PEP follow-up forms (Appendix 13E to
13G) which should be attached to the chart of every patient who reports exposure.

To facilitate counseling and informed decision making for HIV PEP, the list of information items
to be given for clients on PEP service is summarized in Appendix 13C. Patients given PEP drugs
should be counseled on the side effects of ARVs. The steps in the clinical management of HIV PEP
are summarized in Appendix 13B.
Considerations for Pregnant Women and Women of Childbearing Potential
Because of its potential teratogenicity, efavirenz (EFV) should not be used in any non-occupational
PEP (nPEP) regimen during pregnancy or among women of childbearing age at risk of becoming
pregnant during the course of antiretroviral prophylaxis. A protease inhibitor or nucleoside reverse
transcriptase inhibitor-based regimen should be considered in these circumstances.
Children
Potential HIV exposure in children occurs most often by accident (e.g., needle sticks, in the
community, fights, or playground incidents resulting in bleeding by an HIV-infected child) or by
sexual abuse or assaults (Nourse et al. 1999). Young children who cannot swallow capsules or
tablets need to be given other alternative preparations appropriate for pediatric dosing (Appendix
13D). Adherence to the prescribed medications will depend on the involvement of parents or
guardians, and support provided to them.
Documentation of PEP Service Given
Each person with occupational HIV exposure should report the incidence to his immediate
supervisor. Initial PEP management should be given in the case team, and the exposed person
should be referred to the ART clinic for further follow-up. Documentation of exposure and
management given should be done by using the potential HIV exposure documentation and follow-
up form (Appendix 13E to 13H ), which would be attached with the patient chart. The person
who gives PEP service should be trained on PEP service delivery (or a training with a PEP
management component) for he/she is responsible for completing the potential HIV exposure
documentation and follow-up form (Appendix 13E to 13G), attach it with the patient chart, use the
PEP decision-making tools (job aid) to determine indications for PEP, and decide on the use of two
or three drug regimens (Appendix 13M).
If PEP is not indicated, the PEP trained service provider (preferably the case team leader) will
file the completed potential HIV exposure documentation and follow-up form (Appendix 13E to
13G) with the patient chart and indicate to the exposed person that no further follow-up is needed.
The incident and the service given should also be documented in the service register in the service
outlet.
In the ART clinic, the persons getting PEP service will have a minimum of six follow-up visits, and
each time the patient comes for a visit, the HIV exposure documentation and follow-up form that is
attached with the patient’s chart and the PEP register (Appendix 13E to 13G) placed in the ART
clinic are updated. Documentation and reporting of PEP service given for non-occupational
exposure will be similar to that of occupational exposure.

HCWs Infected with HIV and/or HBV or HCV
HCWs infected with HIV and/or HBV or HCV should inform the facility manager of their status.
The facility IPC team should strive to prevent transmission of infections to patients and, at the same
time, maintain the livelihood and privacy of the infected staff members. These HCWs should not
be prohibited from providing patient care if they are not performing invasive procedures, the
infection is well-controlled, they fully comply with recommended IPC practices, and there are no
other factors that would prevent them from safely carrying out patient care activities.
HCWs with these conditions should be closely followed up by a team of clinicians for periodic
clinical monitoring, to assess treatment response and viral suppression, when appropriate, and to
revise recommendations about duty restrictions accordingly. They should avoid performing
procedures that may result in increased risk of contact with large amounts of blood and body fluids.
There are no restrictions for those staff with viral loads less than designated levels (Henderson,
Dembry, Fishman, et al. 2010).
The Society of Healthcare Epidemiology of America (SHEA) has classified patient care and clinical
procedures into three different categories based on the risk of transmission of bloodborne pathogens.
Category I: Procedures with minimum risk of bloodborne virus transmission
Clinical procedures and patient care activities that either do not involve touching patients (e.g.,
history taking, counseling) or are limited to touching patients’ intact skin (e.g., performing physical
examinations) and mucous membranes (e.g., performing vaginal examinations, performing some
dental procedures, phlebotomy). It also includes minor surgical procedures with very minimal
exposure to patients’ blood and body fluids (e.g., surface stitches, gastrointestinal endoscopy
procedures).
Category II: Procedures for which bloodborne virus transmission is theoretically possible
but unlikely
Several surgical procedures are examples of such procedures, including ophthalmic surgery, dental
surgery that requires local anesthesia, minor oral surgical procedures, endoscopic and arthroscopic
procedures, provision of contraceptive methods, minor gynecological procedures, starting of central
lines, and medical male circumcisions.
Category III: Procedures for which there is definite risk of bloodborne transmission
Procedures for which there is definite risk of bloodborne transmission of viruses or that have
previously been classified as “exposure-prone.” All major surgical procedures that involve a high
volume of blood and body fluids are Category III procedures with definite risk of exposure.
Examples of Category III procedures are: general surgery; oral surgery with difficult access for
suturing; emergency surgical procedures involving bleeding and exposure to a high volume of
blood; obstetric procedures, including cesarean section; and orthopedic surgeries. Any major
surgical procedure that goes beyond three hours and requires changing gloves should not include
staff members infected with bloodborne pathogens.

Managing HCWs Infected with HIV and/or HBV or HCV
HCWs infected with bloodborne pathogens whose viral load is below the minimum designated level
should follow a six-point plan described below to safely provide patient care and be productive.
The HCWs should:
• Not have transmitted infection to any patient.
• Obtain advice from a team of clinicians about continuing to care for patients.
• Undergo testing twice a year to demonstrate the maintenance of a viral burden below
designated levels.
• Receive follow-up by a clinician with expertise in managing bloodborne pathogen
infections and consent to share their results with the IPC/occupational health team at the
facility.
Consult closely with experts on the use of optimal IPC procedures:
A. This may include guidance on double gloving, changing gloves during procedures,
avoiding digital palpation of needle tips, and performing all procedures under direct
view. It also includes promptly withdrawing from a procedure if they have any injury
that bleeds and informing the IPC/occupational health team about any injuries.
B. Adhere strictly to recommended procedures, including the routine use of double gloving
for Category II (such as minor surgery) and Category III (such as major surgery)
procedures and frequent glove changes during procedures, particularly if performing
technical tasks that have a potential to compromise glove integrity.
Agree in writing to comply with recommendations and guidance of the expert clinicians and the
facility IPC/occupational health and management team.
Adapted from: Henderson, Dembry, Fishman, et al. 2010
Monitoring Prevention of Occupational Exposures and Injuries
Healthcare facilities should evaluate the effectiveness of occupational health interventions and
practices on a routine basis. They should conduct surveillance to collect, analyze, and disseminate
data on risks to HCWs. There should be a system to report any occupational exposure and injury,
which should be supported by prompt management and PEP. The rates of injuries or exposures
among HCWs should be routinely reviewed and reported back to the staff, and strategies and action
plans to prevent future injuries should be developed and updated.
Surveillance activities can be conducted by staff organizing occupational health activities at the
facility and/or with the assistance of IPC staff.
SUMMARY
In the course of their duties, millions of HCWs around the world are routinely exposed to a variety
of health and safety hazards, including infectious agents. Infections can be transmitted to HCWs,

who can in turn transmit the infections to patients and others. The goals of IPC intersect with those
of occupational health activities in preventing and addressing infectious hazards at healthcare
facilities. Therefore, IPC staff should be involved in occupational health activities at the facility,
and occupational health staff should be knowledgeable about IPC.
IPC elements of an occupational health program include surveillance, education, immunization, and
exposure prevention and response. Protection of staff by the application of standard precautions to
every patient, every time, and the use of disease- or syndrome-specific transmission-based
precautions to prevent exposures to infectious agents, are essential to prevent occupational
exposures. Recommendations for managing specific occupational exposures and infections in staff
members are based on the epidemiology of infectious disease transmission in healthcare facilities,
and they should target HCWs as potential sources or hosts. Special attention may be needed for
specific groups of employees with potential increased risk of exposure (laboratory, pregnant, and
emergency response personnel, and HCWs infected with HBV, HCV, and HIV). Last, the
effectiveness of interventions to protect HCWs from occupational infection should be evaluated.
Monitoring progress and identifying causes, with feedback to key persons, can enhance prevention
activities.
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CHAPTER 13: INFECTION PREVENTION AND CONTROL ASPECTS OF OCCUPATIONAL HEALTH IN
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Chapter 14: Client Education on Infection Prevention and Control 289
CHAPTER 14: CLIENT EDUCATION ON INFECTION
PREVENTION AND CONTROL
Key Topics
• Significance of client education on IPC
• Components of effective client education program
• Good examples of a patient education program
• Steps in client’s education on IPC
• Models of client education
BACKGROUND
Educating and empowering patients and clients to actively participate in their care help reduce a
patient's risk of HAIs. However, creating an open dialogue can be a challenge in today's healthcare
system. So how can hospitals improve their patient education programs and help patients become
empowered and active in their treatment?
Four components have been reported as being fundamental to the process of patient/client
empowerment:
1. Patient understands his/her own role
2. Patient’s acquisition of sufficient knowledge of their ability to collaborate or be
involved with their healthcare provider
3. Patient’s knowledge and skills
4. The presence of facilitating environment
Based on these four components, empowerment can be defined as a process in which patients
understand their role, and are given knowledge and skills by their healthcare providers to perform
tasks cognizant of the community’s sociocultural differences and which encourages patient
participation.
First, hospitals need to understand what accreditation standards are required of hospitals. The Joint
Commission established certain standards to protect patients' rights and assist hospitals in patient
education. These standards, while broad, provide the framework for healthcare providers to
establish patient education practices.
One of the Ethiopian Standard Agency hospital standards requires the hospital to provide patient
education and training based on the patient's needs. This includes conducting a learning needs
assessment and then administering training to the patient based on the assessment. The standard
provides examples of what hospitals should train patients on, including basic health practices and
safety.
The information given to the patient should be appropriate for the patient's age, literacy level,
education, and language skills. Patient materials should be geared between sixth and eighth grade
reading levels. Use of medical terminology or jargon should be avoided.

With shorter lengths of stay and limited time for teaching, print and audiovisual materials are
important adjuncts for any discharge teaching plan. However, they are just adjuncts and should not
replace individualized instruction. Printed materials are useful for reinforcing information provided
to patients while in the hospital and also serve as a ready resource. Printed material is an important
reminder of key points after patients return home.
Family members are the vital links in the transition from hospital to home care. Families must be
included in discussions and demonstrations. Family is any person who plays an important role in
the patient's life.
Every effort must be made to ensure that learning takes place in incremental steps and that patients
are not overwhelmed with too much information at one time.
Significance of Client Education on IPC
Although there are many unanswered questions on how to approach patient involvement in this part
of the guidelines, WHO and World Alliance for Patient Safety are actively highlighting the role
that patients and their families could play in the improvement of healthcare. Actionable strategies
are being developed with a strong emphasis on working in partnership with healthcare authorities,
partners, and professionals.
They are the basis of infection control precautions that are to be used as a minimal expectation in
the care of all patients. For example, hand hygiene is a major component of standard precautions
and one of the most effective methods to prevent transmission of pathogens associated with
healthcare. In addition to that, the use of PPE should be guided by risk assessment and the extent of
contact anticipated with blood and body fluids, or pathogens. Supplementary to the practices carried
out by health workers when providing care, all individuals (including patients and visitors) should
comply with infection control practices in healthcare settings. The control of the spread of
pathogens from the source is the key to avoid transmission. Among source control measures, those
like respiratory hygiene/cough etiquette that developed during the SARS outbreak have now been
considered part of standard precautions.
Worldwide escalation of the use of standard precautions would reduce unnecessary risks associated
with healthcare. The promotion of an institutional safety climate helps improve conformity with
recommended measures. Therefore, subsequent risk reduction, provision of adequate staff and
supplies, together with leadership and education of health workers, patients, and visitors are critical
for an enhanced safety climate in healthcare settings.
HAIs are a major issue in PS. Hand hygiene is one of the primary measures to prevent HAI and
limit the spread of antimicrobial resistance. However, for hand hygiene to be promoted and
practiced, patient participation is quite an important element of the strategy. Studies undertaken
on the effects of patient education confirmed that health education is a dependable instrument to
increase staff adherence with handwashing. Given that support from HCWs is crucial for success,
the first and most important step is to enlist their full and enthusiastic support. A major educational
campaign using expressive patients, when possible, may be needed to convince physicians and
nurses of the value of patient participation.

The objective is to help HCWs recognize the contribution of patients and their families to the
healing process and to be receptive to patient input. This campaign must be designed to take into
account the numerous healthcare provider-related obstacles to patient participation (e.g., perception
of a lack of time and their level of training in the patient-caregiver relationship). Once HCWs are
“on board,” educational programs for patients must be offered so that they have the knowledge
required to participate.
The strategy also emphasizes that when educating patients, the healthcare provider needs to
understand the legitimacy and relevance of patient involvement and be convinced of the
effectiveness of involving patients. When involving patients, numerous patient-related factors
known to influence patient participation must be addressed and overcome. Although they are not
modifiable, socio-demographic factors (e.g., age, disease severity, and ethnicity) must also be taken
into account. When both the HCW`s and the patient’s support are secured, positive feedback will
emerge from the patients and contribute to the safety of healthcare.
Components of Effective Client Education Program
1. Have clear policies and procedures in place that guide proper implementation of patient
education and empowerment.
2. Have a clear assignment of roles and responsibilities for all steps in the patient education
process to qualified individuals in a context of shared responsibility and accountability. The
list is inclusive of the patient’s primary care provider, other physicians, nurses, pharmacists,
and other clinicians. The qualifications of the responsible individuals should be
determined by the healthcare organization within the limits of applicable law and regulation.
3. Incorporate training on procedures and basic principles for patient education in the
educational curricula, orientation, and continuing professional development activities for
healthcare professionals.
4. Develop and have an evaluation component that includes using both qualitative and
quantitative measures to determine not only what works, but under what conditions and
within which organizational contexts the program works.
5. Background of evidence on effective patient/client education program.
A program in which there is some evidence of patient and HCW empowerment is usually part of
the multifaceted approach. It includes one or all of the following: educational tools, motivation
tools, and role modeling.
For example, education on hand hygiene on admission to the hospital could be designed in such a
way that it encompasses the above four components. With respect to hand hygiene, an educational
program for patient/staff empowerment and improvement can be categorized as: educational (can
include Internet), motivational (reminders/posters), and role modeling in the context of a
multimodal approach.

Good Examples of a Patient Education Program
Example 1
In addressing IP through hand hygiene, it is very important that the administration ensure that it
has clear policies and procedures in place that require:
• Provision of education on hand hygiene on admission of the patient to the hospital.
• Display of reminders of hand hygiene in a consistent and conspicuous location (for
example, the patient’s sink) so that it is easily accessible to patients and their family
caregivers.
• Information on hand hygiene for patients can be designed in the form of printed
matter, an oral demonstration, or audiovisual means. Hand hygiene and other
educational reminders should be displayed in a consistent and highly noticeable
location.
Example 2
The steps of patient participation orientation in the hospital following surgery are:
• Wash your hands carefully after handling any type of soiled material. This is especially
important after you have gone to the bathroom.
• Because you are part of your healthcare team, do not be afraid to remind doctors and
nurses about washing their hands before working with you.
• If you have an intravenous catheter, keep the skin around the dressing clean and dry.
Tell your nurse promptly if the dressing become loose or gets wet.
• Likewise, if you have a dressing on the wound, let your nurse know promptly if it
became loose or gets wet.
• If you have any type of catheter or drainage tube, let your nurse know promptly if it
becomes loose or dislodged.
• Carefully follow your doctor’s instructions regarding breathing treatments and getting
out of bed. Don’t be afraid to ask for help, advice, or sufficient pain medications!
• If possible, ask your friends and relatives not to visit you if they themselves feel ill.
Six key points that allow patients to be more actively involved in their own care
1. Share vital information with all caregivers, including all medicines, allergies, and ailments.
2. Ask questions about health problems and care.
3. Ask for help from family and friends.
4. Express your concerns.
5. Alert caregivers if your symptoms change.
6. Pay close attention to instructions.

Recommended techniques for patient educators (HCWs/community workers)
1. Slow down: Communication can be improved by speaking slowly and by spending
just a small amount of additional time with each patient. This will help foster a patient-
centered approach to the clinician-patient interaction.
2. Use plain, non-medical language to explain things to patients as you would explain
them to your grandmother.
3. Show or draw pictures because visual images can improve the patient’s recall of ideas.
4. Limit the amount of information provided and repeat it. Information is best
remembered when it is given in small pieces that are pertinent to the tasks at hand.
Repetition further enhances recall.
5. Use of the “teach-back” technique reconfirms that the patients really understood
learning items taught before by asking them to repeat back your instructions.
6. Create a shame-free environment to make patients feel comfortable asking questions.
Include other supporters of patients (patient’s family or friends) to promote understanding.
Despite the fact that a great deal of attention focuses on written materials suitable for low
literacy audiences, non-written materials can also be effective patient education tools. The
non-written materials include graphic illustrations, such as pictures, pictographs, and
models, along with audiotapes, videotapes, and various forms of computer-assisted learning
applications. Studies in the area tend to be supportive of the use of this alternative, stress
the effectiveness of these non-written modalities, and their supremacy over written
materials for patients with limited literacy.
Steps in Clients Education
1. Make the patient comfortable
The general standard on patient education also requires that the hospital provide the patient with
education on how to communicate concerns about PS issues. Patients may feel cautious or
apprehensive about asking questions because they do not want to be considered a tough patient, but
encouraging them to speak up can go a long way in preventing infections.
Healthcare providers can help ease some of the apprehension by routinely asking patients if they
have any questions or concerns they want to discuss. By asking them first, you open a whole new
line of communication, making the patient more willing to come forward if he or she notices a
change.
It is difficult for the patient to have the courage to speak up unless they are invited to speak up by
the system. When patients do speak up, thank them for raising a concern even if it leads to nothing.
Once again this will help them feel more at ease and comfortable bringing up issues in the future.
Encourage patients to also advocate for either a family member or someone else to help look out
for potential risks. These advocates can also look out for variations in practice, and may notice
changes in the patient before healthcare providers see a difference.

Very often the patient is not only reluctant to speak up but they are not feeling well, or they may
have trouble communicating for a variety of reasons; therefore, a third party is vital.
2. Help the patient become an active participant
Talk to the patient about what he or she can do to optimize care, instead of focusing solely on what
the healthcare provider is going to do for the patient. Patients want to be involved in their care. They
want to be an active participant. And family members want to be involved in any way they can.
Encourage the patient to ask questions about his or her treatment. Urinary tract infections and central
line infections are common in hospitals and can be costly to the patient. When it comes to certain
things like catheters, assure patients that they can ask doctors and nurses, for example: “Is it essential
for my care?” Educating the patient on these practices may reduce the risk of infection by
eliminating a potential threat.
3. Let patients know what their care should look like
A lot of bad things in healthcare happen because of the variation in practice. If we can encourage
patients to know what to expect, then they can identify a variation in practice that is exposing them
to a potential risk.
Educate the patient on what dressings or catheters need to be changed on a daily basis and what the
process looks like. Showing the patient what to expect and what techniques help prevent infections
empowers him or her to look out for potential risks when shifts change and someone else begins
changing his or her dressings.
4. Don't forget about high-risk patients
Hospitals need to improve their patient education and infection control training with high risk
patients.
There are a number of patients out there who have diabetes. Significant changes in their blood sugar
can increase their chances of infection, whether they are in the hospital or not.
For patients at a higher risk of infection, such as those who are diabetic, taking immune suppressive
drugs, overweight, or smokers, healthcare providers need to discuss how these issues heighten their
risk for infection. Patients in the ICU are also considered high risk. Healthcare providers should
encourage ICU patients to get up and out of bed.
5. Understand the patient's rights to education
According to Ethiopian Food and Drug Administration (EFDA) standards, the patient possesses the
right to receive information in a manner in which the patient understands. In certain cases, the
hospital may need to provide interpreting or translation services to accommodate the patient's
communication needs. These needs should be determined during the initial learning needs
assessment.

Models of Client Education
Reminders and Motivational Messages
Patient empowerment models often include visual reminders for both the HCW and the patient.
These visual reminders usually include small badges or stickers worn by patients with a message,
such as “did you wash/sanitize your hands?” If the message is framed correctly, posters can serve
as a visual reminder and encouragement for both the patient and the HCW to participate in hygiene
practices of the hands. Educational videos, posters, brochures, and visual reminders targeting the
education of HCWs and patients were evaluated in three long-term care facilities as part of a
comprehensive program of hand hygiene. This combination of HCW education and patient
empowerment resulted in an aggregate increase in compliance with hand hygiene to bring about
52% and 32% reduction in infections (WHO 2009).
Role Modeling
Role modeling, in which the HCW’s behavior toward hand hygiene or other positive behavior is
influenced by either peers or superiors, has been observed to influence compliance with and
motivation of the patient to be empowered.
Graphic Illustrations (pictures, pictographs, models)
Research has shown that using pictures, including cartoons or pictographs, with verbal explanations,
and the use of models can greatly increase patient’s understanding and retention of information. In
a recent study, the mean correct recall of information was found to be 85% with pictographs and
14% without it. Another study found that patients receiving wound care instructions with cartoons
were able to answer questions correctly 46% of the time when tested three days later compared with
only 6% of patients who received only written instructions and answered questions correctly (Delp
& Jones 1996).
Topics for IPC Client Education
Patients and their families play an important role in infection prevention. Educating them on the
infection prevention basics and helping them feel comfortable asking questions, voicing concerns
to healthcare professionals in health facility will help alleviate HAIs. There are IPC-related areas to
be addressed by hospitals in day-to-day patient and their families’ health education program.
Table 14.1 Topics for IPC client education
Client education
topics (area of
concern for IPC)
Description Case
Healthcare-associated
infections (HAIs)
HAIs are infections that patients can get in a
healthcare facility while receiving medical
care. These infections are often preventable.
• Surgical site infections
• Catheter-associated
infections
• Bloodstream infection
• Pneumonia

Client education
topics (area of
concern for IPC)
Description Case
Hand hygiene Hand hygiene is the most important way to
help prevent infection.
• Hand washing
• Alcohol-based hand sanitizer
Safe injection
practices
Teach your patients to recognize unsafe
injection practices—and to speak up if they
have a concern.
• Safe injection practices
matter and speaking about
the unsafe practices
Monitor the
cleanliness of their
area
Keeping the patient’s environment and
equipment clean is extremely important—
especially frequently touched items.
• How to clean the patient’s
environment
• Health care waste
management
• Food and water
Medications Patients need to understand what medicines
they are taking, and why—especially if
antibiotics are being prescribed. Taking
antibiotics the wrong way can promote
antibiotic resistance.
• Use only physicians ordered
antibiotics
• Finish a course of antibiotics
Post-surgical care Preventing infections after surgery is
essential. Teach your patients how to care
for their wound after leaving the healthcare
facility and to verify that any person that
inspects their wounds or changes their
dressings uses appropriate hand hygiene.
• Cleaning of post-operative
wound
Care for their devices Advise your patients to ask if their device
(catheter, etc.) is necessary.
• IV cannula
• Catheters
Source: Infection prevention and you.org 2022
SUMMARY
Educating and empowering patients and clients to actively participate in their care help reduce a
patient's risk of hospital acquired infections. Actionable strategies are being developed with a strong
emphasis on working in partnership with healthcare authorities, partners, and professionals.
They are the basis of infection control precautions that are to be used as a minimal expectation in
the care of all patients. For example, hand hygiene is a major component of standard precautions
and one of the most effective methods to prevent transmission of pathogens associated with
healthcare. In addition, the use of PPE should be guided by risk assessment and the extent of contact
anticipated with blood and body fluids, or pathogens. Supplementary to the practices carried out by
health workers when providing care, all individuals (including patients and visitors) should comply
with infection control practices in healthcare settings.

BIBLIOGRAPHY
CHAPTER 14: CLIENT EDUCATION ON INFECTION PREVENTION AND CONTROL
Bergeson, SC, Dean, JD. 2006. A systems approach to patient-centered care. Journal of the American
Medical Association, 296(23):2848-51. https://pubmed.ncbi.nlm.nih.gov/17179462/.
Delp, C, Jones, J. Communicating information to patients: the use of cartoon illustrations to improve
comprehension of instructions. Academic Emergency Medicine: Official Journal of the Society for
Academic Emergency Medicine, 3(3), 264–270. https://pubmed.ncbi.nlm.nih.gov/8673784/
Infection prevention and you.com. 2022. https://infectionpreventionandyou.org/protect-your-
patients/educate-your-patients-on-infection-prevention/
WHO. 2005. World Alliance for Patient Safety. Global patient safety challenge 2005-2006. Geneva,
Switzerland: WHO.
https://www.who.int/patientsafety/events/05/GPSC_Launch_ENGLISH_FINAL.pdf?ua=1.
WHO. 2009. WHO guidelines on hand hygiene in healthcare. Geneva, Switzerland: WHO.
https://apps.who.int/iris/bitstream/handle/10665/44102/9789241597906_eng.pdf;jsessionid=E054F5DA05
CC6AE82F801742BA9FB85B?sequence=1.

APPENDICES

Appendix 4A. Sample Hand Hygiene Observation Form: World Health Organization 299
APPENDIX 4A. SAMPLE HAND HYGIENE OBSERVATION
FORM: WORLD HEALTH ORGANIZATION
Source: WHO 2009e. (https://cdn.who.int/media/docs/default-source/integrated-health-services-(ihs)/hand-
hygiene/monitoring/surveyform/observation-form.doc?sfvrsn=39b780c9_6 )

Source: WHO 2009e

Appendix 4B. Sample Hand Hygiene Observation Form Modified for Room Entry and Exit 302
APPENDIX 4B. SAMPLE HAND HYGIENE OBSERVATION
FORM MODIFIED FOR ROOM ENTRY AND EXIT
FOUR rules for conducting Hand Hygiene Observations
1. Observe for hand hygiene upon ENTRY and EXIT from Patient Environment
Patient Environment definition:
Private or semi-private room: Crossing room door
Between patients and multi-patient rooms setting: Crossing the “curtain line”
2. A provider may use the Alcohol-Based Hand Rub (ABHR) dispenser just outside the room door, inside the
room, at the sink, or the healthcare worker’s personal ABHR bottle.
3. DO NOT GUESS. If your view is blocked and you cannot confirm if provider performed hand hygiene, simply
check “Unsure” box.
4. Do not exceed 3 observations per provider in one session.
UNIT:______________________ DATE:____/_____/____ DAY OF WEEK:
__________________
TIME: ________ TO _________ OBSERVER NAME:
__________________________________________
Role of Observed Person Hand
Hygiene
Observed Behavior
Obs
#
Nurse*
Midwife
Physicians
(all
doctors)
CO/PA/Dentist**
Pharmacist/Laboratory
Technician
Support
Staff
Other
Providers
(nursing,
medical
and
other
students,
and
residents)
Other
1=Unknown
2=Clinical
procedure
3=Transport
4=Nursing
care
5=Blood
sample
collection
6= Nutrition
7= Admin
Circle
ONE
Not
observed
Hand
cleaning
with
ABHR
Hand
wash
with
soap
and
water
No
hand
hygiene
Area
location
ENTRY
EXIT
ENTRY
EXIT
ENTRY
EXIT

Appendix 4B. Sample Hand Hygiene Observation Form Modified for Room Entry and Exit 303
Role of Observed Person Hand
Hygiene
Observed Behavior
Obs
#
Nurse*
Midwife
Physicians
(all
doctors)
CO/PA/Dentist**
Pharmacist/Laboratory
Technician
Support
Staff
Other
Providers
(nursing,
medical
and
other
students,
and
residents)
Other
1=Unknown
2=Clinical
procedure
3=Transport
4=Nursing
care
5=Blood
sample
collection
6= Nutrition
7= Admin
Circle
ONE
Not
observed
Hand
cleaning
with
ABHR
Hand
wash
with
soap
and
water
No
hand
hygiene
Area
location
ENTRY
EXIT
ENTRY
EXIT
ENTRY
EXIT
ENTRY
EXIT
* All types of nursing staff including diploma, degree, post-graduate, supervisor, and assistant.
** CO=Clinical Officer, PA=Physician Assistant.
Adapted from: Johns Hopkins Medicine. Hospital Epidemiology and Infection Control. JHH Hand Hygiene Compliance
Data Collection Form. http://www.hopkinsmedicine.org/heic/docs/HH_observation_form.pdf

Appendix 4C. Implementation of a Multimodal Hand Hygiene Improvement Strategy 304
APPENDIX 4C. IMPLEMENTATION OF A MULTIMODAL HAND
HYGIENE IMPROVEMENT STRATEGY
As discussed in this hand hygiene chapter, the WHO Multimodal Hand Hygiene Improvement
Strategy identifies five key steps to implement a hand hygiene improvement strategy (see Steps 1–
5 below). The implementation strategy was developed based on a literature review of the
implementation science, behavioral change, spread methodology, diffusion of innovation, and
impact evaluation (WHO 2009a). For detailed information on assessing the economic impact of hand
hygiene promotion, refer to WHO Guidelines on Hand Hygiene in Health Care.
It is important to note that although each step in the process builds on activities occurring in previous
steps, it should be considered a cyclical process rather than a linear one. Each step of the cycle should
be repeated, refined, and enhanced at least every five years to maximize the impact of the hand
hygiene program (WHO 2009a; WHO 2009f).
Step 1: Facility Preparedness
Suggested duration: 3 months
Step 1 in the hand hygiene improvement strategy is to evaluate and prepare the facility for the
program. To have a successful hand hygiene program, careful planning is required from the start of
the program. During Step 1, it is imperative to map out a clear strategy for the entire program.
Key Activities in Facility Preparedness
Key Activities
Identify coordinator.
Identify key individuals/groups.
Undertake a situation analysis of hand hygiene practices at the facility.
Complete ABHR production, planning, and costing tool.
Train observers/trainers.
Procure raw materials for ABHR (if necessary).
Collect data on costs/benefits of hand hygiene improvement program: costs of program versus
reductions in costs of managing hospital acquired infections.
Undertake training on data entry and analysis.
Steps 1–5 Reproduced from: WHO 2009a.
Step 2: Baseline Evaluation
Suggested duration: 2–3 months
Step 2 includes the baseline evaluation of hand hygiene practices, perceptions, knowledge, and
available infrastructure in the healthcare facility.
Hand hygiene is the most effective way of preventing the transmission of infections and it is
imperative to collect data on the HCWs’ perceptions of the importance of hand hygiene. These

perceptions, and other factors influencing compliance, will provide valuable information for strategy
development. Changing perceptions can be the means by which improvements in hand hygiene
practices are achieved. Similarly, assessing the infrastructure of the healthcare facility may help
explain current hand hygiene practices and will guide improvement efforts. Lack of access to sinks,
running water, and ABHR may all contribute to low hand hygiene compliance and should be
addressed during the implementation planning step.
Key Activities in Baseline Evaluation
Key Activities
Undertake baseline assessments:
Senior manager perception survey
HCW perceptions survey
Ward structure survey
HCW knowledge survey
Begin local production or market procurement of ABHR.
Conduct hand hygiene observations.
Monitor use of soap and ABHR.
Perform data entry and analysis.
Step 3: Implementation
Step 3 is implementation of the planned program. The availability of ABHR at the point of care, and
the education and training of HCWs are crucial to the success of this step. Healthcare facilities may
choose to hold a high-profile launch event to coincide with the start of the program’s
implementation. Publicizing leadership endorsement and support also helps foster a successful
implementation stage (WHO 2009a). During implementation, it is also important to evaluate HCWs’
tolerance and acceptance of ABHR. Monthly collection of hand hygiene observations should
continue during implementation, if possible. If time and resources are limited, observations should
occur only during Step 2 and Step 4.
Key Activities in Implementation
Key Activities
Launch the strategy.
Provide feedback on baseline data.
Distribute posters.
Distribute ABHR.
Distribute other WHO materials from the Pilot Implementation Pack.
Educate HCWs.
Undertake practical training of HCWs.
Undertake ABHR tolerance tests.
Complete monthly monitoring of usage of products.

Step 4: Follow-Up Evaluation
Step 4 is the evaluation of the short-term impact of the hand hygiene improvement strategy. By
performing a follow-up evaluation, facilities will gain information they can use to make future
decisions and take actions related to the hand hygiene program. Compliance with hand hygiene
practices among HCWs is the main indicator that should be evaluated. It is important to note that
hand hygiene improvement activities should continue in the healthcare facility according to the local
action plan, even during this evaluation step.
WHO has identified the following as key success indicators in the evaluation of the short-term
impact of a hand hygiene program:
• Increase in hand hygiene compliance
• Improvement in infection control/hand hygiene structures
• Increase in usage of hand hygiene products
• Improved perception of hand hygiene
• Improved knowledge of hand hygiene
The data collected during this evaluation will help shape future actions and the steps the healthcare
facility may take to maintain high hand hygiene compliance rates over time.
Key Activities in Follow-Up Evaluation
Key Activities
Undertake follow-up assessments:
HCW knowledge survey
Senior executive manager perception survey
HCW perception and campaign evaluation survey
Facility situation analysis
Conduct data entry and analysis.
Conduct hand hygiene observations.
Continue monthly monitoring of use of products.
Step 5: Developing Ongoing Action Plan and Review Cycle
Step 5 is to develop an ongoing action plan and review cycle. The goal of the hand hygiene program
is to create an environment in which performing appropriate hand hygiene is central to the facility’s
culture. Reviewing the results of the data and creating a final report detailing the results of the
improvement program will help condense the findings and will aid in creating a future action plan.
Enthusiasm and motivation for the program must remain high to have long-term impact.

Key Activities in Developing an Ongoing Action Plan and Review Cycle
Key Activities
Study all results carefully.
Provide follow-up data.
Develop a 5-year action plan.
Consider scale-up of the strategy.

Appendix 13A. Initial Management of a Person Reporting Exposure to Potentially Infectious Body Fluids 308
APPENDIX 13A. INITIAL MANAGEMENT OF A PERSON
REPORTING EXPOSURE TO POTENTIALLY INFECTIOUS
BODY FLUIDS
The initial management should aim to reduce the time of contact with the source person’s blood,
body fluids, or tissues, and to clean and decontaminate the site of the exposure.
If the skin is broken following an injury with a used needle or sharp instrument, the following
is recommended:
• Do not squeeze or rub the injury site.
• Wash the site immediately using soap or a mild disinfectant solution (like chlorhexidine
gluconate solution or 70% to 80% alcohol solution) not irritating to the skin. If running
water is not available, clean the site with a gel or other hand-cleaning solution or
whatever is customarily available.
• Do not use strong solutions, such as bleach or i odine, to clean the site because they
may irritate the wound and make the injury worse.
After a splash of blood or body fluids, the following is recommended. After a splash contacts
with unbroken skin, do the following:
• Wash the area immediately.
• If, running water is not available, clean the area with a gel or other handrub solution or
whatever is customarily available.
• Do not use strong disinfectants.
After a splash contacts with the eye, do the following:
• Irrigate the exposed eye immediately with water or normal saline.
• Sit in a chair, tilt the head back and have a colleague gently pour water or normal saline
over the eye pulling the eyelids up and down to make sure the eye is cleaned thoroughly.
• If contact lenses are worn, leave these in place while irrigating the eye because they
form a barrier over the eye and will help protect it. Once the eye has been cleaned,
remove the contact lenses, and clean them in the normal manner. This will make them
safe to wear again.
• Do not use soap or disinfectant on the eye.
After a splash contacts with the mouth, do the following:
• Spit the fluid out immediately.
• Rinse the mouth thoroughly using water or saline, and spit again. Repeat this process
several times.
• Do not use soap or disinfectant in the mouth.

Appendix 13B. Summary of Steps in Clinical Management of HIV Post- Exposure Prophylaxis 309
APPENDIX 13B. SUMMARY OF STEPS IN CLINICAL
MANAGEMENT OF HIV POST- EXPOSURE PROPHYLAXIS
Item Recommended action and notes
Person reports
exposure
• First aid, assess the type and severity of exposure, use decision making tools to
assess the exposure and decide eligibility for PEP
• Fill the potential HIV exposure documentation and PEP follow-up form (Appendix 13G)
• This form should be filled for every exposure despite the eligibility for PEP
Eligibility • Eligible if the following four criteria are fulfilled:
o Exposure within 72 hours
o Exposed individual not known to be infected with HIV
o Significant exposure
o Person who was the source of exposure is HIV infected or has unknown HIV status
Informed
consent for PEP
• Information about risks and benefits of PEP
• Health education and counseling on adherence; side effects; risk reduction;
trauma or mental health problems; and social support and safety (both
occupational and non-occupational)
• Consent may be given verbally
• Baseline HIV testing of the exposed person
• Give IEC materials in local language
Additional
laboratory
evaluations
• Rapid HIV test of the source person, if feasible and based on informed consent
and standard operating procedures; also consider testing the source patient for HBV
and HCV (if available)
• Pregnancy testing of exposed person if the person is female and in the reproductive
age group
• Hemoglobin (for zidovudine-containing PEP regimens) HBV and HCV screening, if
available
Medicine • Medicine Two nucleoside-analogue reverse-transcriptase inhibitors + /- boosted
protease inhibitor
• Give doses of ARVs enough for 3 to 5 days (starter packs)
Time to initiation • The initial dose of antiretroviral medicines should be given as soon as possible but not
later than 72 hours after exposure
Duration of
therapy
• 28 days
Link to ART clinic
and subsequent
follow-up there
• The person started on PEP needs to be informed/report to the ART clinic the next
workday for further follow-up.
• The exposed person should have a minimum of 6 visits to the ART clinic up to the
sixth month HIV testing.
• In the ART clinic: Assess and manage side effects; assess and support adherence.
• Give continued health education and counseling on side effects; on the importance of
treatment completion with good adherence, risk reduction; trauma or mental health
problems; and social support and safety (both occupational and non-occupational) in
the first ART clinic visit, at 2 weeks and at 4 weeks.
• Do follow-up HIV testing 6 weeks, 3 months, and 6 months after exposure.
Referral • Intra facility and inter facility referrals, as appropriate
Recordkeeping • Maintain accurate and confidential records

Appendix 13C. Facilitating Informed Patient Decision Making For HIV Post- Exposure Prophylaxis 310
APPENDIX 13C. FACILITATING INFORMED PATIENT
DECISION MAKING FOR HIV POST- EXPOSURE
PROPHYLAXIS
In the process of giving health education and counseling for HIV PEP, people who have been
exposed to HIV must be made fully aware of the following:
• The risk of acquiring HIV infection from the specific exposure
• About the efficacy of PEP
• The importance of taking an HIV test and of receiving appropriate post-test counseling
before starting PEP drugs
• The possibility that they might already be infected with HIV will need to be assessed if
they have not already had an HIV test
• People already living with HIV should be referred to the ART clinic for treatment of
their infection, and if they had started PEP, the medicine should be stopped when the
diagnosis is confirmed
• The importance of adhering to medicine
• The duration of the course of medicine (four weeks)
• The common side effects that may be experienced while taking PEP medicine and
possible drug interactions
• Exposed persons should be advised to avoid blood or tissue donations, breastfeeding, or
pregnancy to prevent secondary transmission, especially during the first six to 12 weeks
post- exposure.
• PEP medicine can be taken during pregnancy and may protect the mother from getting
HIV infection after exposure.
• That continuing to breastfeed while taking PEP is safe, although the risk of transmitting
HIV through breastfeeding is higher in the early stage of infection if women get infected
by HIV while breastfeeding; appropriate counseling.
• Discuss safe alternatives to breastfeeding if they are acceptable, feasible, affordable, and
sustainable.
• Exclusive breastfeeding is strongly recommended whenever alternatives are not
possible.
• Information provided as part of the informed consent process should be appropriate to
the person’s age, literacy skills, and level of education, and should take into account the
context of the exposure.
• The consenting person must be able to understand the risks and benefits of the proposed
intervention (PEP).

Appendix 13D. Pediatrics PEP Doses 311
APPENDIX 13D. PEDIATRICS PEP DOSES
Regimen Pediatrics PEP Doses
1. Two drug PEP:
A AZT + 3TC
B D4T + 3TC (if HB is < 7gm/dl)
2. Three drug PEP:
A AZT + 3TC + LVP/r
B D4T + 3TC + LPV/r (if HB < & 7 gm/dl)
Dose Formulation
1. AZT 0-4 wks: 4 mg/kg/dose PO BID Syrup: 10mg/ml
Capsules: 100mg
Tablet: 300mg
Combvir (AZT/3TC):
300mg/150mg
4wks-12yrs: 180-240mg/m2/dose PO BID
>/=13yrs: 300mg PO BID
2. 3TC 0-4wks: 2mg/kg/dose PO BID Syrup: 10mg/ml
Tablet: 150mg
Combvir (AZT/3TC):
300mg/150mg
>/=4wks: 4mg/kg/dose PO BID
>13 yrs: 150 mg PO BID
3. D4T < 30 Kg: 1mg/kg/dose PO BID Syrup: 1mg/ml
Capsules: 15mg, 30mg
>/= 30mg: 30mg PO BID
4. LPV/r LPV:m230mg/m2/dose Syrup:
LPV/r=400mg/100mg in
5ml
LPV/r =
80mg/ml/2omg/ml
r: 57.5mg/m2/dose PO BID Capsule:
LPV/r=133.3/33.3

Appendix 13E. Post Exposure Prophylaxis Follow-Up Card Legend 312
APPENDIX 13E. POST EXPOSURE PROPHYLAXIS FOLLOW-UP CARD LEGEND
Facility Name: Write the name of the hospital or health center. Date: Date clients’ exposure reported in Ethiopian calendar (dd/mm/yyyy). Medical Record
Number/Card Number: A number given by the facility main chart room. For HMIS sites, this number is medical record number and for the other sites it is
card number. Patient Name: Write patient full name. Age: Write age of the client in years. Sex: Put a check mark on F for female and on M for Male.
Occupation: Occupation of the exposed client (e.g., nurse, physician, teacher). Address: This information is helpful for tracking patients. Write the full
address of the client in the spaces provided. Visits: A follow-up visit in the ART clinic. First the baseline information on the heading portion will be
completed by the health worker who first encountered the exposed cases. The visits days/weeks are estimated from the first date the exposed person appears
to the health facility, e.g., first visit is 1-3 days after initial presentation of the exposed case to the health facility. Write the number of hours elapsed between
time of exposure and time of reporting in hours.
Date of Visit HIV status of source case Exposure status
Enter date of visit in Ethiopian Calendar in
dd/mm/yyyy format
Put a check mark on Reactive
or Non- Reactive if the HIV
status of the source case is
known. If Unknown select
Unknown.
a) Hollow needle deep prick
b) Hollow needle superficial prick c) Solid
needle deep prick
d) Solid needle scratch
e) Splash to the conjunctivae
f) Splash to the oral cavity
g) Splash to intact skin
h) Splash to broken skin
i) Other (specify) cut injury with a surgical
blades etc.....
Circumstance of injury:
a) Trying to secure intravenous line
b) Needle stick injury during surgery
c) Needle stick while disposing of waste
d) Amniotic fluid splash during delivery
e) Splash with body cavity fluids during procedure
f) Other (specify): Cut injury with a surgical blade
while doing a surgical procedure
Exposure code: Occupational Exposure
Code Mucous Membrane
EC1= Few drops and short duration
EC2= Several drops /long duration/ major blood splash
Percutaneous
EC2= Solid and Superficial scratch
EC3= Hollow needle deep puncture
Source code
SC negative: HIV negative
SC1: HIV positive;
Asymptomatic/High CD4
SC2: HIV positive:
Advanced disease/patient on
antiretroviral
therapy/primary
infection/low CD4
SC unknown: HIV status unknown
or source unknown
Exposure type: Non-Occupational
1. Sexual assault
2. Pediatric exposures
3. Non HCW caregivers
4. Unanticipated high-risk exposure
(consensual sexual activity)
5. Condom tears
6. Road traffic accident
7. Other (specify) e.g., community fight, bite
Adherence grading

General counseling on PEP includes
The risk of acquiring HIV infection due exposure
The efficacy of PEP
The importance of having a baseline and follow-up HIV
test
The importance of adherence to PEP drugs
Advice to avoid secondary transmission to other people
in case the exposed person becomes HIV positive due to
exposure
Adherence % of
missed/
month
# of missed
dose per month
G(good) >95% ≤ 3 doses
F(fair) 85‐94% 5‐8 dose
P(poor) <85% ≥ 9 doses
Counseling on:
The risk of acquiring HIV infection due exposure
The efficacy of PEP
The importance of having a baseline and follow-up
HIV test
The importance of adherence to PEP drugs
The duration of the course of medicine (four weeks)
The common side effects of PEP drugs
Advice to avoid secondary transmission to other people
in case the exposed person becomes HIV positive due
to exposure
Types of regimen given:
d4T/3TC or
AZT/3TC (CBV) or
TDF/3TC d4T/3TC/LPV/r AZT/3TC/LPV/r
TDF/3TC/LPV/r
AZT/3TC/EFV
Drug side effects
1. Nausea
2. Diarrhea
3. Fatigue
4. Headache
5.Numbness/tingling
6. Rash
7. Anemia
8. Abdominal pain
9. Jaundice
10. Fat changes
11. Dizzy,
anxiety,
nightmare
12. Other(specify)
Remark: one may use the table to show any other additional information (e.g., linkage to HIV care or other support, tracking, lost, dead)

Post Exposure Prophylaxis Follow-Up Card:
Patient Name: Age: Sex: □ M □ F Occupation
Address: Region: Sub-city/Woreda:
Kebele: House # Tel:
Exposure status: Select a letter from the lists(a-i) Other (specify):
Circumstance of injury: Select a letter from the lists(a-e) Other (specify): Number of hours elapsed after exposure: hrs
HIV status of source case: □ Reactive □Non-Reactive □ Unknown, If Reactive, Source code □ 1 □ 2 Exposure code: □ 1 □ 2 □ 3
Baseline HIV status of exposed person: □ Reactive □ Non-Reactive □ Not done If female, pregnancy test: □ Positive □ Negative
For Non-occupational exposure: □Sexual violence/rape □ Other(specify):
PEP Eligibility: □ Eligible □ Not Eligible Type of PEP regimen provided :
Visits Follow-up
information
Fill the pt
and service
status as
indicated
Measures taken
(e.g., in cases of poor adherence
and drug side effect, additional
PEP drugs prescribed for 2 weeks,
linkages to other services)
Next
appointment
date
Remark
(tracking of
clients lost to
follow-up, etc.)
Visits in the ART
Clinic
1st Visit
( 2-3 days)
Baseline info complete (Y/N)
General counseling on PEP(Y/N)
Adherence (G/F/P)
Drug side effects (1-12)
2nd visit
(2 weeks)
Adherence (G/F/P)
General counseling on PEP
3rd visit
(4 weeks)
Adherence (G/F/P)
Treatment completed(Yes/No)
Reinforce counseling on PEP
4th visit
(6weeks)
HIV test result(N/NR)
5th visit
(3 month)
6th visit
(6 month)

Appendix 13H. Occupational and Non-Occupational HIV Post Exposure Prophylaxis Register 315
APPENDIX 13H. OCCUPATIONAL AND NON-OCCUPATIONAL HIV POST EXPOSURE
PROPHYLAXIS REGISTER
Instructions for PEP register:
Serial Number (SN): A number assigned to patients on the register (e.g., 1, 2, 3, etc.)
MRN/Card Number: A number given by the facility main chart room. For HMIS sites, this number is medical record number and for the
other sites it is card number.
Date: Use Ethiopian Calendar and a format of DD/MM/YYYY to register when patient is enrolled in PEP service
Age: Enter client’s age in year
Sex: Enter ‘M’ for male and ‘F’ for Female
Occupation: Enter client’s current occupation (e.g., health worker, teacher, daily laborer, etc.)
Department/case team: Enter the Department or case team in which the client works (e.g., ANC, OPD, etc.) for occupational
exposures
Non-occupational Exposure: Put a check mark “√” under the Non-Occup-sexual assault/rape column if the client is exposed due to sexual
assault/rape. Specify if the client is exposed to other non-occupational reasons under ‘other-Non-Occup’ column.
Occupational exposure: Put a check mark “√” under the ‘Occup column’ if the patient is exposed occupationally
Exposure Code/type: Put the exposure code types among the lists provided under the foot note of the PEP register, e.g., If a client is exposed
to few drops of blood for short duration of time, write “EC1” under the ‘Exposure code/type’ column.
Source patient HIV Status code: Put the source patient HIV status code listed under the foot note of the PEP register under ‘source patient
HIV status code’ column, e.g., If a client is exposed to a patient whose HIV status is negative after testing then write ‘SC negative’ under the
‘source patient HIV status code’ column.
PEP Eligibility: If the client is eligible for PEP Write ‘Eligible’ otherwise write ‘Not eligible’.
Drug regimen provided: Put the PEP drug regimen provided to the client among the drug regimen listed under the foot note of PEP register,
e.g., if a client is prescribed “AZT/3TC (CBV)” put ‘AZT/3TC (CBV’ under the ‘drug regimen column’.
Treatment completed: Put ‘Yes’ if completed, ‘No’ if not completed the treatment under ‘treatment completed’ column.
HIV status of exposed Person: Write ‘R’ for reactive or ‘NR’ for non-reactive depending or ‘Unknown’ for unknown status on the
patient’s HIV status at base line, 6 weeks, 3month, and 6 month
* Remark: Use the ‘remark column’ to document events like lost, stopped, linkage to HIV care, and other (specify) as applicable

Appendix 13H. Occupational and Non-Occupational HIV Post Exposure Prophylaxis Register 316
SN
MRN/Card
Number
Date
Age
Sex
Occu
patio
n
Case
team/
Department
Non-occupational
exposure
Occupat
ional
exposur
e(√)
Exposure
Code/
type
Source
patient
HIV
status
code
PEP
Eligibility
(Eligible/
Not
Eligible)
Drug
regimen
Provided
Treatment
complete
d
(Y/N)
HIV status of Exposed
person (R or NR)
Remark
Rape/
Sexual
assault(√)
Other
Non-
occupation
al
(specify)
Base
line
6w
3m
6m
Occupational exposure code
Mucus membrane
EC1= Few drops and short duration
EC2= Several drops/long duration/major blood splash
Percutaneous
EC2= Solid and superficial scratches
EC3=Hollow needle deep puncture
Non-occupational
exposure
Sexual assault
Pediatric exposure
Unanticipated high-risk
exposure
Community fight
Road traffic accident
Other (specify
HIV status code of the source
SC negative: HIV Negative
SC1: HIV positive; Asymptomatic/High CD4
SC2: HIV positive: Advanced disease/patient on antiretroviral
therapy/primary infection/low CD4
SC unknown: HIV status unknown or source unknown
Drug Regimen Code
d4T/3TC or AZT/3TC (CBV) or TDF/3TC
d4T/3TC/LPV/r or AZT/3TC/LPV/r or TDF/3TC/LPV/r or AZT/3TC/EFV
Remark
Lost
Dead
Stopped
Other (Specify)

Appendix 13I. PEP Facility Assessment Form 317
APPENDIX 13I. PEP FACILITY ASSESSMENT FORM
Facility:
Date of Visit [Ethiopian Calendar] (dd/mm/yy)
Completed by:
Checked by:
A. Set up of PEP Service
1. Is there a PEP Service (both for occupational and non-
occupational exposures) in the facility?
Yes No
2. Is the PEP service in 24 hours available?
Yes No
Are PEP drugs accessible 24 hours where?
Emergency case team L &D case team
In Patient case team OPD case team
Others specify
3. Is there follow-up of patients on PEP in the ART clinic
Yes No
Are the staffs in the health facility aware of PEP service?
Yes No
B. Human Resource
1. Number of staff trained in trainings that includes PEP (ART,
IMAI/IMNCI, IP, STI/PEP)
MD Nurse HO_ HA/Junior Nurse Other
2. At least one PEP trained personnel assigned in each case team
on duty hours to give PEP service (as an additional
responsibility)
MD Nurse HO_ Junior Nurse/HA
3. At least one PIHCT trained personnel assigned in each
case team on duty hours to give CT service for PEP purpose
(as additional responsibility)
MD Nurse HO_ Junior Nurse/HA
4. Is there PEP Focal Person?
Yes No
5. Is the PEP focal person a member of the MDT committee
and IP committee?
Yes No
6. Does PEP focal person regularly (weekly) follow, if
the PEP service is given according to the standard
management?
Yes No
C. Materials available in the PEP service outlets:
1. Do the PEP service outlets have standard reference
materials? (Check box when available)
National infection prevention and patient safety
Reference manual
National PITC guideline
PITC protocol
PITC cue card
Decision making tool for PEP wall charts
Others specify
2. Standard IEC materials available in PEP service areas for
HIV Yes No
PITC Yes No
ART Yes No
PEP Yes No
D. Equipment/Supplies/Furniture available in the
facility:
1. Is there adequate supply and appropriate use of personal
protective equipment’s in every service outlet of the hospital?
Yes
No, specify
2. Is there clean water supply in the rooms?
Yes No
3. Are the recommended ARVs for PEP available in PEP
service delivery areas at least one pack from each?
Yes No
4. Are condoms available in the service outlets?
Yes No
5. Is there a penile model to demonstrate about condom use?
Yes No
7. Are HIV test kits available in the PEP service outlets?
Yes No
8. Are pregnancy test kits available in the PEP service outlets?
Yes No
9. Safety boxes available in every service outlet for safe disposal
of sharps
Yes No
10. In the pharmacy, are enough stock of recommended ARV
drugs for PEP available?
Yes specify

Appendix 13I. PEP Facility Assessment Form 318
E. Standard M&E Tools
Are the following formats available in the ART clinic?
1. Potential HIV exposure documentation and follow-up form
Yes No
2. PEP register
Yes No
3. Intra facility referral?
Yes No
4. Service outlet HMIS register (in facilities that have not started
the HMIS)
Yes No
F. Service Practice
1. Do healthcare workers follow IP protocol (like using
appropriate personal protective equipment’s, safe disposal of
sharps….)
Yes No Sometimes
2. Is HIV testing and counseling (base line and follow-up at 3 &
6 months) done for patients who take PEP?
Yes No Sometimes
3. Adherence counseling and follow-up of side effects done for
PEP patients according to the standard
Yes No Sometimes
4. Completing of PEP drugs is followed and documented in the
PEP register.
Yes No Sometimes
5. HIV testing of source patient (if required for decision making)
done after taking consent.
Yes No Sometimes
6. Do the health facility MDT and IP committees use PEP
data generated in hospital to improve PEP service delivery
and IP practice of the facility in general?
Yes No Sometimes
7. Do health facility MDT and IP committees have monthly
meetings and monitor the PEP service delivery and IP
practice of health facilities
Yes No Sometimes
8. Does the Health facility have a mechanism for
incorporating the IP and MDT reports (which includes
PEP) into a final report that is given to the CEO and MD
at least quarterly?
Yes No
COMMENTS, RECOMMENDATIONS & FOLLOW-UP
Follow-up - Describe actions since last visit:
Comments about this visit
Recommended actions, persons responsible, time frame

Appendix 13J. Checklist for PEP at Site Level PEP Service Delivery 319
APPENDIX 13J. CHECKLIST FOR PEP AT SITE LEVEL PEP
SERVICE DELIVERY
The below mentioned human resources, materials, and supplies need to be 24 hours available
in each case of health facilities
1. Healthcare provider who is trained on PEP service delivery
2. National infection prevention and patient safety reference manual
3. National PITC guideline
4. PITC protocol
5. PITC cue card
6. Decision making tool for PEP wall charts
7. IEC materials on HIV, PITC, ART and PEP
8. Potential HIV exposure documentation and follow-up form
9. PEP register
10. ARVs (recommended PEP drugs available in EOPD)
11. Condoms
12. Penile models
13. Gloves
14. Syringe with needle
15. Lancet
16. Safety box
17. Soap and water supply
18. HIV test kits
19. Pregnancy test kit
20. Post pill

Appendix 13K. Risk and Work Restrictions for Healthcare Workers Exposed to or Infected With Infectious Diseases of Importance in Healthcare Settings 320
APPENDIX 13K. RISK AND WORK RESTRICTIONS FOR HEALTHCARE WORKERS
EXPOSED TO OR INFECTED WITH INFECTIOUS DISEASES OF IMPORTANCE IN
HEALTHCARE SETTINGS
This information is to be used in the absence of local regulations.
Disease/ Infection/
Syndrome
Mode of
Transmission
Transmission Risk Incubation
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Cholera Fecal-oral
contaminated water
Rare Rare Hours to 5
days, Shedding
up to 10 days
after cessation
Stool contact,
unwashed hands
Hand hygiene,
Contact Precautions,
clean environment
Yes;
No
recommend-
ation for
HCWs
No
Work restrictions: No duty. Restrict from food handling.
Duration of restrictions: Until 48 hours after last episode of diarrhea except for food handlers: 2 consecutive negative fecal specimens at least 48 hours
apart and at least 48 hours after stopping antibiotics are required.*
Conjunctivitis due
to adenovirus
Contact with eye
secretions and
contaminated
surfaces and
equipment
High High 5–12 days,
shedding from
incubation
period until 14
days after onset
Surfaces,
equipment,
unwashed hands
Hand hygiene,
clean instruments,
and equipment
No No
Work restrictions: No contact with patient or patient environment.
Duration of restrictions: Until discharge from eye ceases.
Cytomegalovirus
(CMV)⁰
Contact with urine,
saliva, breast milk,
cervical secretions,
and semen from
infected person who
is actively shedding
virus
Rare Rare Unknown Contact with body
fluids, especially
saliva, blood, and
urine, possibly
unwashed hands
Hand hygiene,
No No

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Work restrictions: No restriction.
Duration of restrictions: None.
Diarrheal
diseases
Contact with infected
person’s stool,
consumption of
contaminated food
or water, contact
with objects or
environment
contaminated with
stool
Varies Varies Varies by
pathogen
causing
diarrhea
Stool contact,
unwashed hands,
contaminated
environmental
surfaces,
contaminated food
or water
Hand hygiene,
clean environment
See specific
disease
No
Work restrictions: Acute (diarrhea with or without other symptoms): No contact with patient or the patient environment, or food handling.
Duration of restrictions: Until symptoms resolve (check the need for negative stool cultures for specific diarrheal etiologies).*
Diphtheria By respiratory
droplets, contact
with skin lesions
No data Rare 2–5 days,
infectious for 2
weeks
Close contact, face-
to-face exposure,
cough
Hand hygiene,
Droplet Precautions
for pharyngeal
lesions, Contact
Precautions for skin
lesions
Yes, and
booster every
10 years†
PEP with
antibiotic
should be
discussed,
vaccination if
none within 5
years
Work restrictions: Active disease: No duty; Asymptomatic carriers: No duty.
Duration of restrictions: Until antibiotic therapy completed and 2 negative cultures more than 24 hours apart.
Hemorrhagic
fever
(e.g., Ebola,
Marburg, Lassa
virus)
Bloodborne;
possible contact
transmission
Negligible Moderate to
high
5–21 days Exposure of
mucous
membranes or
respiratory tract,
through broken skin
or sharps injury
Hand hygiene, Barrier
Precautions to
achieve full skin
coverage to be used
with training and
trainer observer to
monitor
No Antivirals
should be
discussed

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Caring for EVD patients with adequate PPE and no known exposure: Active monitoring for fever and symptoms twice per day. Off duty if any symptoms.
Work restrictions: Active suspected or confirmed: Off duty. Post-exposure: Off duty. With active monitoring for fever and symptoms twice per day.
Duration of restrictions: Active: Until cleared by medical staff. Post-exposure: Until 21 days after last exposure.
HAV Person-to-person by
fecal-oral route;
infected food
handlers with poor
personal hygiene
can contaminate
food
Rare Rare 15–50 days Stool contact,
unwashed hands,
eating or drinking in
patient care area
Hand hygiene,
especially with babies
and incontinent
patients
Yes; HCWs
are not
considered at
increased riskᶧ
Immune
globulin
Work restrictions: No contact with patient or the patient environment, or food handling.
Duration of restrictions: Until 7 days after the onset of jaundice.
HBV⁰ Via sharps, mucosal,
and non-intact skin,
contact with blood,
semen, vaginal
secretions, and
bloody fluids
Low Moderate, 2–
40% after
percutan-
eous injury
from infected
patient
45–180 days
(average 60–90
days)
Sharps injury, blood
and serum-derived
body fluid splashes
to mucous
membranes
Hand hygiene,
Standard
Precautions, including
prevention of sharps
injury, vaccination
Yes; Recom-
mended for all
HCWs†
Depends on
HCW
immune
status and
source
patient’s
status;§
for non-
immune
HCWs with
HBsAg,
positive
source HBIG
and
vaccination
series§
Work restrictions: Acute or chronic HBV: Do not exclude from duty but restrictions apply depending on circulating viral levels and procedures
performed by HCW. Requires review by occupational health/IPC personnel and possibly an expert review panel.#
Duration of restrictions: Different recommendations if HepB antigen is positive or negative and if HBV is < 104
GE/mL (genome equivalents/milliliter
plasma) or > 104
GE/mL.#

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
HCV⁰ Via sharps, mucosal,
and non-intact skin
contact with blood,
semen, vaginal
secretions, and
bloody fluids
Low Moderate, 0–
10%
(average
1.8%) after
percutane-
ous injury
from infected
patient
6–7 weeks Sharps injury,
splash on mucous
membranes or non-
intact skin
Hand hygiene,
Standard
Precautions, including
prevention of sharps
injury
No No
Work restrictions: Acute or chronic HCV: Do not exclude from duty but restrictions apply depending on circulating viral levels and procedures
performed by HCW. Requires review by occupational health/IPC personnel and possibly an expert review panel.# Post-exposure:§
Duration of restrictions: Different recommendations if HCV is < 104 GE/mL or > 104 GE/mL.#
Hepatitis E Person to person by
fecal-oral route,
contaminated water,
contaminate food
— — 2–9 weeks Contaminated food
or water, unwashed
hands
Hand hygiene,
No No
Work restrictions: Off duty.
Duration of restrictions: Duration of illness, viral shedding in stool occurs 7–30 days after onset of jaundice.
Herpes simplex⁰ Contact with virus in
saliva of carriers,
contact with vesicle
fluid
Rare Low 2–14 days Contact with
infected site or
saliva, vaginal
secretions, or
amniotic fluid
Hand hygiene,
Standard
Precautions⁰ (Contact
Precautions in
disseminated
infection)
No No
Work restrictions: Genital: No restriction. Hands (herpetic whitlow): No contact with patient or the patient environment. Orofacial: No contact with high-
risk patients.◊
Duration of restrictions: Genital: None. Hands (herpetic whitlow): Until lesions heal.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Human
immunodeficiency
virus (HIV)⁰
Primarily via sharps
contact with blood;
mucosal or non-
intact skin contact
with blood; semen,
vaginal secretions,
and bloody body
fluids less likely to
transmit
Rare Low, 0.2–
0.4% after
sharps
exposure to
infected
person
Within 6 months Sharps injury,
splash on mucous
membranes or non-
intact skin
Hand hygiene,
including prevention
of sharps injury
No Depends on
type of body
fluid, type of
exposure and
source
patient
status;§
when
indicated,
initiate
antiretroviral
treatment as
soon as
possible
(within 72
hours)§
Work restrictions: Acute or chronic HIV: Do not exclude from duty but restrictions apply depending on circulating viral levels and procedures performed
by HCW. Requires review by occupational health/IPC personnel and possibly an expert review panel.#
Post-exposure:§
Duration of restrictions: Different recommendations if circulating HIV viral burden is < 5x102
GE/mL or > 5x102
GE/mL.#
Influenza⁰ Droplet spread;
direct droplet
transmission or
droplet-to-contact
transmission of
respiratory
secretions of
infected patients
Moderate Moderate 1–5 days Close contact with
patient (within 1–2
meters from
coughing/
sneezing)
Hand hygiene,
Droplet Precautions,
annual vaccine
Yes; annual
immunization
with a single
dose recom-
mended
yearly for
HCWᶧ
Antivirals
may be
recom-
mended in
certain
situations
Work restrictions: No contact with high-risk patients◊
during community outbreaks.
Duration of restrictions: Until acute symptoms resolve.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Measles⁰ Airborne; direct
airborne
transmission or
airborne-to-contact
transmission of
respiratory
secretions of
infected person
High High 5–21 days Inhaling droplets
and airborne virus
or contact with the
patient’s respiratory
secretions
Hand hygiene,
Airborne and Contact
Precautions, vaccine
Yes; all HCWs
should be
immune to
measles,
proof of
immunity or
immunization
required pre
patient
contact†
Immune
globulin
Work restrictions: Active: Off duty. Post-exposure in non-immune people: Off duty.
Duration of restrictions: Active: 7 days after rash appears. Post-exposure: From 5th
day after first exposure through 21st
day after last exposure and/or 4
days after rash appears.
Meningococcal
infectious
N. meningitides
Droplet spread;
direct droplet
transmission or
droplet-to-contact
transmission of
respiratory
secretions of
infected patients
— Rare 2–10 days Close contact (face to
face) with respiratory
secretions
of patients with
meningococcemia or
meningococcal
meningitis
Hand hygiene,
Droplet Precautions
Yes; recom-
mended for
HCWs at risk
of exposure†
(tetravalent A,
C, W135, and
Y)
Antibiotic
after close
contact‡
Work restrictions: Active: No duty. Post-exposure: No restrictions. Recommended prophylaxis includes: rifampin (600 mg twice a day for 2 days), a
single dose of ciprofloxacin (500 mg), or a single dose of ceftriaxone (250 mg) IM.
Duration of restrictions: Active: Until 24 hours after start of effective antibiotic therapy. Post-exposure: No restrictions.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Mumps Droplet spread;
direct droplet
transmission or
droplet-to-contact
transmission of
respiratory
secretions and
saliva of infected
patients
Moderate Moderate 12–25 days Close contact with
patient (within 1–2
meters from coughing/
sneezing)
Hand hygiene,
Droplet Precautions
Yes; HCWs
are not
indicated as a
group at
increased
risk†
No
Duration of restrictions: Active: 9 days after onset of parotitis. Post-exposure: From 12th
day after first exposure through 26th
day after last exposure or 9
days after onset of parotitis.
Methicillin-
resistant S.
aureus (MRSA)
infection
Direct and indirect
contact
Rare Rare Depends on
the type of
infection
Unwashed hands,
contaminated
surfaces,
contaminated
equipment
Hand hygiene,
Contact Precautions
No No
Work restrictions: Active, draining skin lesions: No contact with patient or the patient environment, or food handling. Carrier: No restriction unless
epidemiologically linked with transmission of the organism.
Duration of restrictions: Until lesions have resolved.
Norovirus Fecal-oral (direct or
indirect contact with
patient’s stool or
vomit), contaminated
surfaces,
contaminated food
or water
High High 12–48 hour Stool or vomit
contact, possibly
aerosol
transmission during
vomiting
Hand hygiene,
clean equipment,
clean environment
No No
Work restrictions: Acute: No contact with patient or the patient environment, or food handling.
Duration of restrictions: Until symptoms resolve, viral shedding in stool may occur.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Parvovirus B19
(erythema
infectiosum or
fifth disease)
Contact with infected
persons, fomites, or
respiratory
secretions
— Rare 6–10 days Respiratory
secretions
Droplet Precautions
for patients with fever
and anemia or
aplastic crisis or
chronic B19, others
No No
Work restrictions: Acute: Off duty. Exposed: no restriction.
Duration of restrictions: 7 days after onset of illness.
Pertussis
(whooping cough)
Droplet spread;
direct droplet
transmission or
droplet-to-contact
transmission of
respiratory
secretions of
infected patients
Moderate Moderate 7–10 days Respiratory
secretions and
respiratory droplets
Hand hygiene,
Droplet Precautions
Yes; recom-
mendation for
HCWs
currently
under review†
Macrolides
Work restrictions: Active: Off duty. Post-exposure asymptomatic: No restriction if PEP received. Post-exposure symptomatic: Off duty.
Duration of restrictions: Active: from beginning of catarrhal stage through 3rd week after onset of paroxysms. Post-exposure: Until 5 days of effective
antibiotic therapy.
Poliomyelitis Contact with feces
or urine of infected
person, respiratory
secretions and
fomites
Rare Rare 3–21 days,
vaccine-
associated polio
(oral vaccine):
7–21 days after
vaccination
Feces, respiratory
secretions, lab
specimens
Hand hygiene,
Contact Precautions
Yes; all HCWs
should have
completed a
full course of
primary
vaccination
against polio†
No
Work restrictions: Active: Off duty. Post-exposure: Vaccination series or booster.
Duration of restrictions: Duration of illness.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Rabies Animal bite, saliva,
tissue and organ
transplants
Rare Rare 1–3 months Lab samples, saliva
of infected patients
(theoretical)
Hand hygiene,
Yes; HCWs
are not at
increased risk
Yes
Work restrictions: Active: Off duty. Post-exposure: No restriction, consider post-exposure treatment.
Duration of restrictions: Rabies is mostly fatal.
Respiratory
syncytial virus
(RSV)
Droplet contact or
direct contact with
respiratory
secretions
secretions, hands,
and fomites
Hand hygiene,
Contact Precautions
No No
Rotavirus Person-to-person via
fecal-oral route; food
handlers may
contaminate food
Moderate Moderate 2–3 days Stool contact,
unwashed hands,
environmental
surfaces, fomites
Hand hygiene,
clean environment,
clean equipment
Yes; adults
including
HCWs are not
at increased
risk of severe
disease†
No
Work restrictions: Acute: No contact with patient or the patient environment, or food handling.
Duration of restrictions: Until symptoms resolve.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Rubella⁰ Droplet contact or
direct contact with
respiratory
secretions; airborne
transmission not
demonstrated
droplets and
secretions
Droplet Precautions
(acute infection),
Contact Precautions
(congenital rubella)
Yes; all HCWs
should be
immune to
rubella and
proof of
immunity or
immunization
required
prepatient
contact†
No
Duration of restrictions: Active: Until 5 days after rash appears. Post-exposure: From 7th
day after last exposure.
Salmonella or
shigella
Person-to-person via
fecal-oral route, via
contaminated food
or water; food
handlers with poor
personal hygiene
can contaminate
food
Low Low 1–3 days Stool contact,
unwashed hands
Hand hygiene,
Contact Precautions
for incontinent
patients and babies
Yes (typhoid),
currently no
recommen-
dation
regarding
HCWs†
No
Work restrictions: Acute: No contact with patient or the patient environment, or food handling. Carrier: No restriction from patient care unless staff
member handles food* or is epidemiologically linked with transmission of the organism.
Duration of restrictions: Until symptoms resolve unless food handler,* in which case a specific number of negative cultures is required.
Novel respiratory
viruses (SARS,
bird flu, MERS-
CoV, etc.)
Droplets, contact
(possibly airborne)
Medium Medium Varies Small droplets from
respiratory
secretions,
possibility of
airborne
transmission
Hand hygiene,
Droplet and Contact
Precautions, use
Airborne Precautions
if possible
No No
Work restrictions: Acute: No duty.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Staphylococcus
aureus
infection
(see also MRSA)
Direct and indirect
contact
Rare Rare Foodborne: 30
minutes–6 days
Impetigo: 1–10
days
Toxic shock
syndrome: 2
days
Unwashed hands,
contaminated
surfaces,
contaminated
equipment
Hand hygiene,
Contact Precautions
No No
Work restrictions: Active, draining skin lesions: No contact with patient or the patient environment, or food handling. Carrier: No restriction unless
epidemiologically linked with transmission of the organism.
Duration of restrictions: Until lesions have resolved.
Scabies Direct skin-to-skin
contact with infected
person
Low
(typical
scabies) to
moderate
(crusted
scabies)
Low (typical
scabies),
moderate
(crusted
scabies)
2–6 weeks Prolonged skin-to-
skin contact (typical
scabies), skin-to-
skin contact during
daily care (crusted
scabies),
infrequently fomites
Hand hygiene,
clean environment,
clean equipment
No No
Work restrictions: Active: No patient contact. Post-exposure: No restriction.
Duration of restrictions: Active: Until after 1st
treatment and cleared by medical evaluation. Post-exposure: Prophylactic treatment not indicated except in
outbreak situations.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Streptococcus,
Group A (GAS)
Droplet contact or
direct contact with
oral secretions or
drainage from
infected wounds
Rare No data Pharyngitis 2–5
days, impetigo
7–10 days,
other infections
variable
Contact with
infected secretions;
HCWs are rarely
carriers
Hand hygiene;
precautions depend
on type of infection –
Minor skin and
endometritis:
Standard
Precautions,
Major skin: Contact
Precautions,
Respiratory tract,
scarlet fever and
invasive disease:
Droplet Precautions
No No
Work restrictions: Active: No contact with patient or the patient environment, or food handling. Carrier: No restriction unless linked with transmission.
Duration of restrictions: Until 24 hours after effective treatment is started.
Tuberculosis
(TB)⁰
Airborne
transmission from
sources with active
pulmonary or
laryngeal TB;
susceptible person
must inhale airborne
droplet nuclei to
become infected
Low to
high
Low to high Weeks to years Incomplete
implementation of
recommend control
measures, including
patient placement,
facility ventilation,
and personal
respiratory
protection
Airborne Precautions Yes, BCG;
There is no
recommenda-
tion for HCWs
in routine
circumstances
Isoniazid
(INH) for
treatment of
latent TB
infection;
4-drug
regimen for
active TB
Work restrictions: Active pulmonary or laryngeal: Off duty. Active extra-pulmonary: No restriction once pulmonary or laryngeal involvement is excluded.
Latent: No restriction. PPD (tuberculin skin test) conversion (> 10 mm induration): No restriction; consider isoniazid prophylaxis depending on local
recommendations.
Duration of restrictions: Active: Until proven non-infectious (by sputum acid-fast bacilli [AFB] culture culture).

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Varicella, chicken
pox, disseminated
zoster⁰
Contact with
vesicles; droplet or
airborne spread from
respiratory tract
High High 10–21 days (up
to 28 days in
person who
receives
varicella-zoster
immune
globulin [VZIG])
Contact with lesions
and aerosols even
without direct
contact with the
infected patient
Airborne and Contact
Precautions
Yes; consider
vaccination of
potentially
susceptible
HCWs (i.e.,
unvaccinated
and with no
history of
varicella)ᶧ
VZIG
Duration of restrictions: Active: Until all lesions are dry and crusted. Post-exposure: From 10th
day (28th
if VZIG is
given) after last exposure.
Localized
varicella-zoster
(shingles)
Contact with
vesicles; perhaps
droplet or airborne
spread from
respiratory tract from
disseminated zoster
Moderate Moderate Years after
acute infection
Contact with lesions
and perhaps
aerosols from
respiratory tract
from disseminated
zoster
Contact Precautions
and Airborne
Precautions for
disseminated zoster
Yes; see
above;
shingles
vaccine not
recommend-
ed specifically
for HCWs
VZIG
Work restrictions: Localized in healthy person: Cover lesions, no contact with high-risk patients.◊
Generalized or localized in immunosuppressed
person: No patient contact. Post-exposure in non-immune people: No patient contact.
Duration of restrictions: Active and generalized: Until all lesions are dry and crusted. Post-exposure: From 10th
day
(28th
if VZIG is given) after last exposure or if varicella occurs, until all lesions dry and crusted.

Disease/ Infection/
Syndrome
Mode of
Transmission
Period
Main Risk in
Healthcare
Facility
Prevention Vaccine
Available
Post-
Exposure
Prophylaxis
(PEP)
Available
Staff to
Patient
Patient to
Staff
Viral respiratory
infections, acute
febrile
Respiratory
secretions
Moderate Moderate 1–7 days Droplet contact or
direct contact with
respiratory
secretions, close
contact (1–2
meters) with patient
Respiratory etiquette,
hand hygiene, Droplet
Precautions, annual
vaccine
Yes (influenza
only)
No
§ PPE—Post-exposure prophylaxis; see Chapter 3, Sharps Injuries and Management of Exposure to Bloodborne Pathogens, in this module for details about PEP for
bloodborne pathogens.
#
See section above on Healthcare Workers Infected with HIV and/or HBV or HCV.
⁰ For information relevant to exposure of pregnant personnel, see Table 2-7 in this chapter.
◊ Definition of high-risk patient: neonates and immunocompromised persons of any age. For influenza, also those > 65 years, residents of nursing homes, persons
with chronic pulmonary or cardiac conditions, diabetes. (CDC 1998)
‡ Definition of close contact: Direct, mouth-to-mouth contact as in resuscitation attempts, endotracheal intubation, endotracheal tube management, or close
examination of oropharynx of patients. (CDC 1998; WHO 2002)
† For vaccine recommendations for HCWs (WHO 2016b), see Table 2-4.
* For management of illness in food handlers, see Volume 1, Chapter 12: Food and Water Safety.

Appendix 13L. Decision Making Tools for PEP 334
APPENDIX 13L. DECISION MAKING TOOLS FOR PEP
Source: Federal Ministry of Health. 2014. National guidelines for comprehensive HIV prevention, care and treatment.
https://www.childrenandaids.org/sites/default/files/2017-05/Ethiopia-Consolidated-ART-Guideline-2014.pdf

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