diseases viral animals pathology veterinary cattle attachment cycle replication steps general strand rna dna medicine milking cow classification machine virus knuckling methods of milking machine milking milk full hand rakshith stripping guineapigs lab mycotic parasitic bacteria hamster pathogenesis flies black mosquitoes mouth foot fmd vesicles ulcer buffaloe domestic vesiculovirus rhabdoviridae stomatitis vesicular ppt presentation multiplication uncoating
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