Origins of Cholera Pandemics
Author Information
Author(s): Feng Lu, Peter R. Reeves, Ruiting Lan, Yi Ren, Chunxu Gao, Zhemin Zhou, Yan Ren, Jiansong Cheng, Wei Wang, Jianmei Wang, Wubin Qian, Dan Li, Lei Wang
Primary Institution: TEDA School of Biological Sciences and Biotechnology, Nankai University, Tianjin, China
Hypothesis
What are the origins and relationships of the pandemic clones of Vibrio cholerae?
Conclusion
The study concludes that the 6th and 7th pandemic clones of Vibrio cholerae gained pandemic potential independently.
Supporting Evidence
- The study sequenced the genomes of three Vibrio cholerae strains to analyze their evolutionary relationships.
- Findings suggest that the 6th and 7th pandemic strains did not evolve from a common ancestor but rather developed independently.
- The mutation rate of the cholera strains was found to be 100 times higher than previously assumed.
Takeaway
Scientists studied the DNA of cholera bacteria to understand how different strains caused pandemics. They found that two major strains developed their ability to spread independently.
Methodology
The genomes of a 1937 prepandemic strain and a 6th pandemic isolate were sequenced and compared with the published 7th pandemic genome to analyze mutational and recombinational events.
Limitations
The estimates of divergence times are approximations and may be affected by statistical sampling errors.
Digital Object Identifier (DOI)
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