title: Appearance of haemagglutinability of infectious bronchitis virus following in vitro and in vivo tracheal passages.
mesh_terms: D000818:Animals; D002642:Chick Embryo; D003332:Coronaviridae / Q000472:pathogenicity*; D006387:Hemagglutination, Viral; D001351:Infectious bronchitis virus / Q000472:pathogenicity*; D009924:Organ Culture Techniques; D012703:Serotyping; D014132:Trachea / Q000382:microbiology*; D014774:Virulence