title: Clearance of the challenge organisms from the upper respiratory tract of chickens injected with an inactivated Haemophilus paragallinarum vaccine.
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines / Q000276:immunology*; D002645:Chickens / Q000276:immunology*; D006190:Haemophilus / Q000276:immunology*; D012137:Respiratory System / Q000382:microbiology*; D014613:Vaccines, Attenuated / Q000276:immunology
chemical_list: D001428:Bacterial Vaccines; D014613:Vaccines, Attenuated