This document discusses Toxoplasmosis, a zoonotic parasitic disease caused by Toxoplasma gondii. It provides a historical overview of the parasite's discovery in 1908 in North Africa. The biological cycle and modes of transmission are described, highlighting cats as the definitive host and shedding of oocysts in their feces. Clinical signs vary depending on the infected host, from asymptomatic infection in immunocompetent humans to severe disease in immunocompromised individuals or congenital infection of fetuses. Prevention focuses on proper cooking of meat and hygiene.