Pathogenicity of Australian isolates of Haemophilus paragallinarum and Haemophilus avium in chickens.
Twenty-seven Australian avian Haemophilus isolates were tested for their ability to cause infectious coryza in specific pathogen-free chickens. All 15 isolates, identified as H. paragallinarum, produced infectious coryza, whereas all 12 H. avium isolates were nonpathogenic, but spread to in-contact chickens.
D000818:Animals; D001315:Australia; D002645:Chickens / Q000382:microbiology*; D003139:Common Cold / Q000382:microbiology / Q000473:pathology / Q000662:veterinary*; D006190:Haemophilus / Q000302:isolation & purification / Q000472:pathogenicity*; D009092:Mucous Membrane / Q000473:pathology; D010256:Paranasal Sinuses / Q000473:pathology; D011201:Poultry Diseases / Q000382:microbiology* / Q000473:pathology; D013047:Specific Pathogen-Free Organisms; D014774:Virulence