title: Morphological variation among avian infectious bronchitis virus strains.
mesh_terms: D000818:Animals; D000914:Antibodies, Viral; D000917:Antibody Formation; D001991:Bronchitis / Q000662:veterinary*; D002642:Chick Embryo; D003332:Coronaviridae / Q000145:classification* / Q000276:immunology / Q000472:pathogenicity; D014644:Genetic Variation; D007106:Immune Sera; D008854:Microscopy, Electron; D011201:Poultry Diseases / Q000382:microbiology*; D012703:Serotyping; D014776:Virus Cultivation
chemical_list: D000914:Antibodies, Viral; D007106:Immune Sera