[Antigenic relations between Vibrio cholerae and Aeromonas hydrophila].

The antigenic relationships between Vibrio cholerae and the oxidase-positive intestinal bacteria, agglutinated on slides by cholera antiserum, were investigated by the agglutination reaction. Of the 478 oxidase-positive strains studied only strain 209 A, belonging to species Aeromonas hydrophila was selected. Evidence was found of common agglutinogenic fractions between Vibrio cholerae and Aeromonas hydrophila 209 A. Attention is drawn to possible confusions in the preliminary stages of a laboratory diagnosis of cholera.