title: Australian infectious bronchitis viruses: identification of nine subtypes by a neutralisation test.
abstract: The antigenic relationships between 17 Australian infectious bronchitis viruses, including six vaccine viruses, were studied by a neutralisation test using a plaque reduction method in chick embryo kidney cell monolayers. The 17 viruses formed nine distinct subtypes. Antiserum to each subtype had a high titre to viruses of the same subtype and a lower titre to viruses of different subtypes. The heterologous titres of sera varied widely.
mesh_terms: D000956:Antigens, Viral / Q000032:analysis; D001315:Australia; D002478:Cells, Cultured; D003332:Coronaviridae / Q000276:immunology*; D001351:Infectious bronchitis virus / Q000254:growth & development / Q000276:immunology*; D009500:Neutralization Tests
chemical_list: D000956:Antigens, Viral