The pathogenicity of an infectious bronchitis virus for laying hens, with observations on pathogenesis.
D000818:Animals; D002645:Chickens; D011201:Poultry Diseases / Q000209:etiology*; D012328:RNA Viruses / Q000472:pathogenicity*; D012141:Respiratory Tract Infections / Q000662:veterinary*; D014777:Virus Diseases / Q000662:veterinary*