Border disease in Norway. Serological examination of affected sheep flocks.
D000367:Age Factors; D000818:Animals; D000914:Antibodies, Viral / Q000032:analysis*; D005260:Female; D009664:Norway; D010576:Pestivirus / Q000276:immunology*; D012756:Sheep; D012757:Sheep Diseases / Q000276:immunology*; D014036:Togaviridae Infections / Q000276:immunology / Q000662:veterinary*
D000914:Antibodies, Viral