Control of virus diseases in bulls in artificial insemination centres in Britain.
D000818:Animals; D002170:Canada; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology / Q000517:prevention & control*; D007315:Insemination, Artificial / Q000662:veterinary*; D008297:Male; D012661:Semen / Q000382:microbiology*; D014777:Virus Diseases / Q000517:prevention & control / Q000662:veterinary*