Abstract:
:Toxigenic Vibrio cholerae O1 and O139 serogroups have the capacity of causing epidemic and pandemic cholera but are infrequently found in the environment. The other serogroups are abundant in aquatic environments but do not possess the virulence genes necessary for causing the disease. Of the 559 environmental strains of V. cholerae, collected during different periods from environmental samples in Calcutta, 9 (1.6%) harboured the heat-stable enterotoxin gene (stn). Six of the 9 strains belonged to the O14 serogroup. Thus, V. cholerae strains carrying the stn gene revealed preferential association with the O14 serogroup. Three of the six strains harboured the tcpA gene of the E1 Tor type, which is an unusual feature among environmental V. cholerae strains. A strain that possessed the E1 Tor type tcpA also had the CTX prophage. Pulsed field gel electrophoresis (PFGE) revealed that the stn gene positive O14 strains of V. cholerae were not clonal.
journal_name
Epidemiol Infectjournal_title
Epidemiology and infectionauthors
Sarkar B,Bhattacharya T,Ramamurthy T,Shimada T,Takeda Y,Balakrish Nair Gdoi
10.1017/s0950268802007392subject
Has Abstractpub_date
2002-10-01 00:00:00pages
245-51issue
2eissn
0950-2688issn
1469-4409journal_volume
129pub_type
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