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seroprevalence of antibodies against bovine leukemia virus, bovine viral diarrhea virus, mycobacterium avium subspecies paratuberculosis, and neospora caninum in dairy cattle in saskatchewan.blood was drawn from 1530 dairy cows in 51 herds. for antibodies against bovine leukemia virus, mycobacterium avium subspecies paratuberculosis, and neospora caninum, 37.4%, 2.7%, and 5.6% of cows were test positive, respectively, while 29.2% of herds had unvaccinated animals with > or = 1:64 for bovine viral diarrhea virus.200515759829
survey of mycobacterium avium subspecies paratuberculosis serological status in beef herds on community pastures in saskatchewan.johne's disease is a well recognized problem in dairy herds. relatively little information is available on either the prevalence or the control of johne's disease in commercial cow-calf operations. in the fall of 1999, blood samples were collected during pregnancy testing from cows on community pastures in saskatchewan. sera from these cows were analyzed using a commercial elisa for antibodies to mycoplasma avium subspecies paratuberculosis. all cows from each herd examined at the community past ...200212125186
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