title: Observations and comments on two outbreaks of abortion associated with IBR virus infection.
mesh_terms: D000034:Abortion, Veterinary / Q000209:etiology*; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology*; D004196:Disease Outbreaks / Q000662:veterinary*; D005260:Female; D007242:Herpesvirus 1, Bovine; D011247:Pregnancy