title: Antigenic relationships among strains of Vibrio parahaemolyticus.
abstract: The antigenic relationships of 79 strains of Vibrio parahaemolyticus representing 46 assigned K-types were studied by tube agglutination. Homologous titers of 46 anti-K sera ranged from 80 to 2,560. All but three sera exhibited from one to six heterologous reactions, the majority of which gave titers of </=20, but 19 sera showed cross-reactions whose titers exceeded 40. Nine reciprocal and 16 unilateral relationships were described. Some of the cross-reactions involved heat-extractable K-antigens, as determined by absorption with nonheated and heated heterologous antigens, whereas others did not involve K-antigens since absorption with the heterologous antigens had no effect on the homologous systems. On the basis of the reactions of selected antisera to the O-antigens of some of the K-strains, the cross-reactions could not be explained solely on the basis of O-specificities.
mesh_terms: D000327:Adsorption; D000372:Agglutination Tests; D000818:Animals; D000941:Antigens / Q000032:analysis*; D000942:Antigens, Bacterial / Q000032:analysis; D003429:Cross Reactions; D005243:Feces / Q000382:microbiology; D005399:Fishes; D005517:Foodborne Diseases / Q000382:microbiology; D005759:Gastroenteritis / Q000382:microbiology; D006801:Humans; D007106:Immune Sera; D011817:Rabbits / Q000276:immunology; D012623:Seawater; D012703:Serotyping; D014733:Vibrio / Q000145:classification / Q000276:immunology* / Q000302:isolation & purification; D014871:Water Microbiology
chemical_list: D000941:Antigens; D000942:Antigens, Bacterial; D007106:Immune Sera