title: Serologic and immunologic studies on three types of hemagglutinin of Haemophilus paragallinarum serotype 1 organisms.
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000096:biosynthesis; D001428:Bacterial Vaccines / Q000276:immunology; D002645:Chickens; D000939:Epitopes; D006190:Haemophilus / Q000276:immunology*; D006385:Hemagglutination Inhibition Tests / Q000662:veterinary; D006388:Hemagglutinins / Q000145:classification / Q000276:immunology*
chemical_list: D000907:Antibodies, Bacterial; D001428:Bacterial Vaccines; D000939:Epitopes; D006388:Hemagglutinins