title: Serotyping of haemophilus pleuropneumonia isolates using ring precipitate tests.
mesh_terms: D000818:Animals; D006190:Haemophilus / Q000145:classification*; D006192:Haemophilus Infections / Q000276:immunology / Q000662:veterinary*; D011817:Rabbits; D012703:Serotyping / Q000379:methods / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000276:immunology*