title: Serological and immunological differences between two hemagglutinins of Haemophilus paragallinarum strain 221.
mesh_terms: D000918:Antibody Specificity; D006190:Haemophilus / Q000276:immunology*; D006388:Hemagglutinins / Q000145:classification*; D012703:Serotyping
chemical_list: D006388:Hemagglutinins