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Vibrio cholerae pathogenic clones.

Anna Salim1, Ruiting Lan, Peter R Reeves

  • 1School of Molecular and Microbial Biosciences, University of Sydney, Sydney, New South Wales 2006, Australia.

Emerging Infectious Diseases
|December 2, 2005
PubMed
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We resolved the evolutionary relationships between Vibrio cholerae pandemic clones. The seventh pandemic clone is closely related to the US Gulf and Australian clones, and pre-seventh El Tor strains, distinct from the sixth pandemic clone.

Area of Science:

  • Microbiology
  • Evolutionary Biology
  • Genetics

Background:

  • Vibrio cholerae causes cholera, a significant global health concern.
  • Understanding the evolutionary history of pandemic strains is crucial for disease control.
  • Previous studies have suggested distinct origins for different cholera pandemics.

Purpose of the Study:

  • To elucidate the phylogenetic relationships between major pandemic clones of Vibrio cholerae.
  • To determine the evolutionary connections between the sixth and seventh pandemic strains.
  • To investigate the origins of the US Gulf and Australian Vibrio cholerae clones.

Main Methods:

  • Phylogenetic analysis using 26 conserved housekeeping genes.
  • Comparative genomics of Vibrio cholerae isolates.

Related Experiment Videos

  • Molecular typing of pandemic strains.

    • Main Results:

    • The seventh pandemic Vibrio cholerae clone is closely related to the US Gulf and Australian clones.
    • Three El Tor strains isolated prior to the seventh pandemic are genetically linked to the seventh pandemic clone.
    • The sixth pandemic clone is evolutionarily distinct from the seventh pandemic and associated strains.

    Conclusions:

    • The findings provide insights into the emergence and spread of Vibrio cholerae pandemic strains.
    • The study clarifies the clonal relationships underpinning cholera pandemics.
    • This research contributes to understanding the genetic basis of Vibrio cholerae evolution.