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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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Carvacrol activity & morphological changes in Mycobacterium tuberculosis.

Sandra S Nakamura de Vasconcelos1, Katiany R Caleffi-Ferracioli1, Laíse A Hegeto1

  • 1Department of Clinical Analysis & Biomedicine, State University of Maringa, Paraná, Brazil.

Future Microbiology
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Summary
This summary is machine-generated.

Carvacrol exhibits significant anti-tuberculosis activity and works synergistically with rifampicin. This natural compound also demonstrates efflux pump inhibition and causes morphological changes in Mycobacterium tuberculosis.

Keywords:
MICMycobacterium tuberculosiscarvacrolderivativesefflux pumpmonoterpeneresistancerifampicinscanning electron microscopysynergism

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Area of Science:

  • Microbiology
  • Natural Product Chemistry
  • Drug Discovery

Background:

  • Tuberculosis (TB) remains a major global health challenge, necessitating novel therapeutic strategies.
  • Natural compounds like carvacrol are being investigated for their potential anti-mycobacterial properties.

Purpose of the Study:

  • To evaluate the anti-tuberculosis activity of carvacrol and its derivatives.
  • To assess carvacrol's synergistic effect with rifampicin.
  • To investigate carvacrol's cytotoxicity, efflux pump inhibitory activity, and effects on Mycobacterium tuberculosis morphology.

Main Methods:

  • Resazurin microtiter assay for activity and drug combination.
  • Ethidium bromide assay for efflux pump inhibition.
  • Scanning electron microscopy for morphological analysis.

Main Results:

  • Carvacrol demonstrated minimum inhibitory concentrations (MIC) between 19-156 μg/ml.
  • A synergistic effect was observed between carvacrol and rifampicin in clinical isolates.
  • Carvacrol exhibited selectivity for M. tuberculosis, inhibited efflux pumps, and induced morphological changes.

Conclusions:

  • Carvacrol possesses notable anti-tuberculosis activity.
  • Carvacrol shows promising synergistic potential when combined with rifampicin for TB treatment.