title: Measurement of antigenic and pathogenic variability of infectious bronchitis virus strains by trachea.
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D000941:Antigens / Q000032:analysis; D002642:Chick Embryo; D046508:Culture Techniques; D007106:Immune Sera / Q000032:analysis; D007201:Indicator Dilution Techniques; D009500:Neutralization Tests; D011201:Poultry Diseases / Q000175:diagnosis / Q000382:microbiology; D012328:RNA Viruses / Q000276:immunology / Q000472:pathogenicity; D014132:Trachea / Q000382:microbiology; D014774:Virulence; D014777:Virus Diseases / Q000175:diagnosis; D014779:Virus Replication
chemical_list: D000941:Antigens; D007106:Immune Sera