concomitant infection of enterotoxigenic escherichia coli in an outbreak of cholera caused by vibrio cholerae o1 and o139 in ahmedabad, india. | in ahmedabad, a major city in the state of gujarat, india, an outbreak of acute secretory diarrhea caused by vibrio cholerae o1 ogawa el tor, v. cholerae o139, and multiple serotypes of enterotoxigenic escherichia coli (etec) occurred in january 2000. all of the representative v. cholerae o1 and o139 isolates examined harbored the ctxa gene (encoding the a subunit of cholera toxin) and the el tor variant of the tcpa gene (encoding toxin-coregulated pilus). etec isolates of different serotypes we ... | 2001 | 11526157 |