title: Comments on the effect of antigenic variations on classification.
mesh_terms: D000818:Animals; D000941:Antigens; D001208:Asia; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis; D002478:Cells, Cultured; D003168:Complement Fixation Tests; D003429:Cross Reactions; D003937:Diagnosis, Differential; D004064:Digestive System / Q000382:microbiology; D004770:Enterovirus / Q000145:classification* / Q000254:growth & development / Q000302:isolation & purification / Q000472:pathogenicity; D004769:Enterovirus Infections / Q000150:complications / Q000453:epidemiology / Q000276:immunology / Q000662:veterinary; D000939:Epitopes; D005060:Europe; D005767:Gastrointestinal Diseases / Q000175:diagnosis / Q000662:veterinary; D007668:Kidney; D009500:Neutralization Tests; D011323:Primates; D012098:Reproduction; D013552:Swine; D013553:Swine Diseases / Q000175:diagnosis / Q000276:immunology; D014481:United States
chemical_list: D000941:Antigens; D000939:Epitopes