diseases animals viral pathology veterinary cattle 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 attachment cycle replication steps general strand rna dna medicine classification virus knuckling machine milking milk full hand rakshith stripping methods of milking machine cow milking
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