title: Establishment of a PRRS virus ELISA-negative boar population using previously exposed boars.
authors.forename: S
authors.initials: S
authors.lastname: Dee
authors.forename: J
authors.initials: J
authors.lastname: Deen
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000276:immunology; D001947:Breeding; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods / Q000662:veterinary*; D008297:Male; D019318:Porcine Reproductive and Respiratory Syndrome / Q000175:diagnosis*; D019316:Porcine respiratory and reproductive syndrome virus / Q000276:immunology*; D012661:Semen / Q000821:virology*; D013552:Swine
chemical_list: D000914:Antibodies, Viral