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Changing epidemiology of cholera due to Vibrio cholerae O1 and O139 Bengal in Dhaka, Bangladesh

Published online by Cambridge University Press:  15 May 2009

A. S. G. Faruque ,
G. J. Fuchs  and
M. J. Albert
A. S. G. Faruque
Affiliation:
International Centre for Diarrhoeal Disease Research, Bangladesh, GPO Box 128, Dhaka 1000, Bangladesh
G. J. Fuchs
Affiliation:
International Centre for Diarrhoeal Disease Research, Bangladesh, GPO Box 128, Dhaka 1000, Bangladesh
M. J. Albert*
Affiliation:
International Centre for Diarrhoeal Disease Research, Bangladesh, GPO Box 128, Dhaka 1000, Bangladesh
*
* Author for correspondence.
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At the International Centre for Diarrhoeal Disease Research, Bangladesh (ICDDR, B) Dhaka we studied the trends in cholera for the period January 1992 to May 1995. Vibrio cholerae O139 Bengal emerged as a second aetiologic agent of cholera in Dhaka in January 1993. In 1993, the majority of cholera cases was due to V. cholerae O139, with V. cholerae O1 accounting for a small proportion of cases. During the latter part of the study period (Jan 1994–May 1995), V. cholerae O1 re-emerged as the predominant cholera strain. The predominant age group affected in endemic cholera due to V. cholerae O1 was children 2–9 years old, and the organism was isolated from more females than from males at all ages. In contrast, cholera due to V. cholerae O139 caused disease mostly in adults 15 years and older, which indicated that this organism was new in this population. As with V. cholerae O1, V. cholerae O139 was isolated from more females than males. The initial rapid emergence and predominance of V. cholerae O139 was considered possibly to herald the start of the eighth pandemic of cholera. However, just after a year, the prevalence of V. cholerae O139 decreased dramatically with V. cholerae O1 resuming the role of the dominant cholera strain. The factor(s) contributing to the dramatic decline in prevalence of V. cholerae O139 is not well understood.

Type
Special Article
Information
Epidemiology & Infection , Volume 116 , Issue 3 , June 1996 , pp. 275 - 278
Copyright
Copyright © Cambridge University Press 1996

References

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