seroprevalence of infection with mycobacterium avium subspecies paratuberculosis, bovine leukemia virus, and bovine viral diarrhea virus in maritime canada dairy cattle.the purpose of this study was to survey the seroprevalence of infection with the agents of production-limiting diseases in dairy cattle in new brunswick, nova scotia, and prince edward island. in 30 randomly selected herds per province, 30 cattle per herd were randomly selected and tested for antibodies to bovine leukemia virus (blv) and mycobacterium avium subspecies paratuberculosis (m. paratuberculosis), while 5 unvaccinated cattle over 6 months of age were tested for antibodies to bovine vir ...200111265187
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