Seasonal Cholera from Multiple Small Outbreaks in Rural Bangladesh
Author Information
Author(s): Stine O. Colin, Alam Munirul, Tang Li, Nair G. Balakrish, Siddique A. Kasem, Faruque Shah M., Huq Anwar, Colwell Rita, Sack R. Bradley, Morris J. Glenn Jr
Primary Institution: University of Maryland School of Medicine
Hypothesis
Whether seasonal cholera epidemics arise from a single clonal strain or reflect multiple small outbreaks is not clear.
Conclusion
The study suggests that seasonal cholera epidemics are consistent with the natural occurrence of Vibrio cholerae year-round in distinct populations at different sites.
Supporting Evidence
- The study found distinct Vibrio cholerae populations in two communities.
- Only a few sequence types were shared between clinical and environmental isolates.
- Statistical analysis showed significant variation in sequence types between clinical and environmental samples.
Takeaway
Cholera outbreaks in rural Bangladesh come from many small sources rather than one big wave, and different areas have their own unique strains.
Methodology
Clinical and environmental V. cholerae were collected systematically from two rural communities over 15 months, and genetic relatedness was evaluated using VNTR patterns.
Limitations
The study is limited to two small communities in Bangladesh, which may not represent cholera dynamics in other regions.
Participant Demographics
The study involved patients with cholera symptoms and environmental samples from two rural communities.
Statistical Information
P-Value
0.036
Statistical Significance
p = 0.036
Digital Object Identifier (DOI)
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