Brucella abortus infection in sheep. I. Field case.
D000034:Abortion, Veterinary / Q000453:epidemiology*; D000818:Animals; D002003:Brucella abortus; D002006:Brucellosis / Q000453:epidemiology / Q000662:veterinary*; D005260:Female; D011247:Pregnancy; D012606:Scotland; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology