丿 brio cholerae · Antigenic structure Common heat-la bile flagellar h antigen O lipopolysaccharide confers serologic specificity More than 1500 antigen serogroups Only o-I and o139 serogroups cause asiatic cholera .Three serotypes; Ogawa, Inaba, Hikojima Two biovars: classic and El torVibrio cholerae • Antigenic structure – Common heat-labile flagellar H antigen – O lipopolysaccharide confers serologic specificity • More than 150 O antigen serogroups • Only O-1 and 0139 serogroups cause Asiatic cholera ❖Three serotypes; Ogawa, Inaba, Hikojima ❖Two biovars; classic and El Tor