Atypical cases of cholera due to serogroup O1 in the native population of Oman and its relation to non-O1/O139.

) is an autochthonous inhabitant of marine and freshwater environments and also a facultative pathogen for humans. It is an acute bacterial enteric disease with high infection rate but has low disease rate. Important distinctions within the species are made on the basis of serogroups and production of cholera toxin (CT), which is responsible for severe diarrhea and potential epidemic spread. Only 2 sero-groups namely