Distribution of ovine virus abortion in the United States.
D000034:Abortion, Veterinary; D000818:Animals; D005260:Female; D011247:Pregnancy; D012756:Sheep; D012757:Sheep Diseases; D014481:United States; D014777:Virus Diseases / Q000662:veterinary*
ABORTION/veterinary; SHEEP/diseases; VIRUS DISEASES/veterinary