On IBR virus and its serological demonstration in cattle.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology*; D046508:Culture Techniques; D007242:Herpesvirus 1, Bovine / Q000302:isolation & purification*; D007241:Infectious Bovine Rhinotracheitis / Q000453:epidemiology / Q000276:immunology*; D008297:Male; D009500:Neutralization Tests / Q000662:veterinary; D013030:Spain; D013737:Testis; D014776:Virus Cultivation