IBR virus neutralizing substance in bull seminal fluid and its removal prior to attempts at virus isolation from semen.
D000818:Animals; D002417:Cattle / Q000382:microbiology*; D007242:Herpesvirus 1, Bovine / Q000302:isolation & purification*; D008297:Male; D012661:Semen / Q000032:analysis* / Q000382:microbiology