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Monitoring Live Mycobacteria in Real-Time Using a Microfluidic Acoustic-Raman Platform.

Mingzhou Chen1, Vincent Baron2, Björn Hammarström3

  • 1School of Physics, University of St Andrews, St Andrews, UK.

Methods in Molecular Biology (Clifton, N.J.)
|July 1, 2024
PubMed
Summary
This summary is machine-generated.

This study uses microfluidics and Raman spectroscopy to observe how bacteria like tuberculosis respond to antibiotics in real-time. This helps understand antibiotic resistance and improve treatment strategies.

Keywords:
Antibiotic resistanceDormancyRaman spectroscopyRapid diagnosisReal-time monitoringSingle cellTuberculosis

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Area of Science:

  • Microbiology
  • Spectroscopy
  • Biotechnology

Background:

  • Tuberculosis (TB) remains a leading infectious cause of death despite available treatments.
  • Prolonged treatment times and patient non-adherence contribute to relapse and antibiotic resistance.
  • Lipid-rich, phenotypically tolerant bacteria exhibit increased resistance, necessitating extended therapies.

Purpose of the Study:

  • To develop and utilize a microfluidic platform for real-time monitoring of mycobacteria.
  • To investigate the dynamic response of bacteria to antibiotic stress using optical analysis.
  • To elucidate the stimuli triggering antibiotic-tolerant states in bacteria.

Main Methods:

  • Acoustic trapping of live mycobacteria (M. smegmatis) within a microfluidic system.
  • Wavelength-modulated Raman spectroscopy (WMRS) for optical analysis of trapped organisms.
  • Real-time observation and comparison of Raman fingerprints under antibiotic stress versus unstressed conditions.

Main Results:

  • The microfluidic system enables observation of mycobacteria for up to 8 hours.
  • Real-time monitoring of antibiotic effects on bacterial 'Raman fingerprints' is achievable.
  • The platform allows dynamic monitoring of microbial responses to various conditions.

Conclusions:

  • This microfluidic WMRS platform offers a novel approach to study microbial responses to antibiotics.
  • It provides insights into the mechanisms of antibiotic tolerance and resistance.
  • The technology can be adapted to study diverse microorganisms and their responses to environmental changes.