Vibrio cholerae O1 El Tor and O139 Bengal Strains Carrying ctxBET, Bangladesh
Shah M. Rashed, Anwarul Iqbal, Shahnewaj B. Mannan, Tarequl Islam, Mahamud-ur Rashid, Fatema-tuz Johura, Haruo Watanabe, Nur A. Hasan, Anwar Huq, O. Colin Stine, R. Bradley Sack, Rita R. Colwell, and Munirul Alam
Author affiliations: International Center for Diarrhoeal Disease Research, Bangladesh (ICDDR,B), Dhaka, Bangladesh (S.M. Rashed, A. Iqbal, S.B. Manna, T. Islam, M.-u. Rashid, F.-t. Johura, M. Alam); National Institute of Infectious Diseases, Tokyo, Japan (H. Watanabe); University of Maryland College Park, Maryland, USA (N.A. Hasan, A. Huq, R.R. Colwell); University of Maryland Baltimore, Maryland, USA (C. Stine); Johns Hopkins Bloomberg School of Public Health, Maryland, USA (R.B. Sack, R.R. Colwell).
Figure. . DNA fingerprinting patterns of Vibrio cholerae. Dendrogram was prepared by Dice similarity coefficient and UPGMA (unweighted pair-group method with arithmetic mean) clustering methods by using pulsed-field gel electrophoresis (PFGE) images of the NotI-digested genomic DNA. The scale bar at the top (left) indicates the correlation coefficient (range 90%–100%). V. cholerae altered ET (ctxBCL) strains (pulsotype A) formed a major cluster (cluster I), separated from prototype ET (ctxBET) strains (cluster II; pulsotype B) and V. cholerae O139 strains (cluster III; pulsotype C), suggesting that they are genetically different. ET, El Tor; Clin, Clinical; Env, environmental.
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