Veterinary Institute--Miskole Budapest, Hungary.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology*; D006814:Hungary; D007410:Intestinal Diseases / Q000453:epidemiology / Q000662:veterinary*; D012141:Respiratory Tract Infections / Q000453:epidemiology / Q000662:veterinary*; D012698:Serologic Tests / Q000662:veterinary; D014777:Virus Diseases / Q000453:epidemiology / Q000662:veterinary*