title: Immunologic properties of variants dissociated from serotype 1 Haemophilus paragallinarum strains.
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial / Q000276:immunology; D002645:Chickens; D006190:Haemophilus / Q000145:classification / Q000276:immunology*; D006388:Hemagglutinins / Q000276:immunology*; D009154:Mutation; D012703:Serotyping
chemical_list: D000942:Antigens, Bacterial; D006388:Hemagglutinins