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Variable host-pathogen compatibility in Mycobacterium tuberculosis.

Sebastien Gagneux1, Kathryn DeRiemer, Tran Van

  • 1Institute for Systems Biology, Seattle, WA 98103, USA. sgagneux@systemsbiology.org

Proceedings of the National Academy of Sciences of the United States of America
|February 16, 2006
PubMed
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Mycobacterium tuberculosis lineages show distinct global population structures linked to specific human groups. These findings suggest pathogen adaptation to human populations, impacting tuberculosis control and vaccine strategies.

Area of Science:

  • Genetics
  • Evolutionary biology
  • Epidemiology

Background:

  • Mycobacterium tuberculosis is a global health threat.
  • Human pathogens often exhibit population genetics structured by human migrations.
  • The evolutionary impact of long-term human-pathogen associations remains understudied.

Purpose of the Study:

  • To investigate the global population structure of Mycobacterium tuberculosis.
  • To explore the evolutionary consequences of human-pathogen associations.
  • To determine if M. tuberculosis lineages are adapted to specific human populations.

Main Methods:

  • Phylogeographical analysis of M. tuberculosis global population structure.
  • Correlation of M. tuberculosis lineages with sympatric and allopatric human populations.

Related Experiment Videos

  • Assessment of tuberculosis transmission dynamics in diverse host populations.

    • Main Results:

    • Six distinct phylogeographical lineages of M. tuberculosis were identified globally.
    • Each lineage was associated with specific, sympatric human populations.
    • M. tuberculosis spread more efficiently in sympatric than allopatric hosts.
    • Tuberculosis in allopatric hosts disproportionately affected individuals with compromised immunity.

    Conclusions:

    • Mycobacterium tuberculosis lineages exhibit adaptation to particular human populations.
    • Findings suggest co-evolutionary relationships between M. tuberculosis and humans.
    • Implications for tuberculosis control strategies and vaccine development are significant.