POPM 4230 Lecture Notes - Lecture 6: Bovine Virus Diarrhea, Chronic Wasting Disease, Respiratory Tract

• School: University of Guelph
• Department: Population Medicine
• Course: POPM 4230

Document Summary

Popm*4230 unit 6 dairy cattle health infectious disease & mastitis. Infectious diseases of dairy cattle: disease is the result of a combination of risk factors, host, agent, environment. If fetus infected between 100-170 days congenital abnormalities can occur: late gestation infection causes seropositive animals (testing positive for presence of virus in blood) Symptoms: persistent infections, mucosal disease, high mortality, low morbidity, fever, oral erosions, diarrhea with blood, death (5-7 days, peracute infection, fever, anorexia, diarrhea, death, hemorrhagic syndrome, fever, diarrhea, severe platelet depletion, death, acute infection, fever, diarrhea, pneumonia, abortion. Prevention: modified-live vaccines available with 80-90% effectiveness at preventing fetus from developing complications, all new animals should be tested, vaccinated, and quarantined for at least 3 weeks. Salmonellosis: opportunistic, highly prevalent bacteria that infects any species (zoonotic, salmonella typhimurium and salmonella dublin (young animals) of concern in dairy cattle. Transmission: fecal-oral route form clinically and sub-clinically (adult"s rarely show signs during lactation) infected animals.