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Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
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Beyond Killing Mycobacterium tuberculosis: Disease Tolerance.

Maziar Divangahi1, Nargis Khan1, Eva Kaufmann1

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Understanding host immunity requires studying both resistance and disease tolerance. Refocusing on these aspects is crucial for controlling tuberculosis (TB) and M. tuberculosis infections.

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Area of Science:

  • Immunology
  • Infectious Diseases
  • Microbiology

Background:

  • Host defense involves resistance (pathogen elimination) and tolerance (limiting damage).
  • Current understanding of tuberculosis (TB) immunity overemphasizes resistance.
  • This bias hinders effective TB control strategies.

Purpose of the Study:

  • To highlight the importance of disease tolerance in host defense.
  • To advocate for a broader investigation of host immunity against M. tuberculosis.
  • To reframe research priorities for improved TB control.

Main Methods:

  • Conceptual review of host-pathogen interactions.
  • Analysis of existing literature on immunity to M. tuberculosis.
  • Discussion of the limitations of resistance-focused research.

Main Results:

  • Disease tolerance is a critical, understudied component of host defense.
  • A narrow focus on resistance limits our understanding of TB pathogenesis.
  • Current strategies may be insufficient due to neglecting tolerance.

Conclusions:

  • A comprehensive understanding of host immunity, including tolerance, is essential for TB control.
  • Future research must integrate both resistance and tolerance mechanisms.
  • Shifting focus will enhance strategies against M. tuberculosis.