A flow cytometry method for assessing M. tuberculosis responses to antibiotics

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Abstract

Traditional drug susceptibility methods can take several days or weeks of incubation between drug exposure and confirmation of sensitivity or resistance. In addition, these methods do not capture information about viable organisms that are not immediately culturable after drug exposure. Here, we present a rapid fluorescence detection method for assessing the susceptibility of M. tuberculosis to antibiotics. Fluorescent markers Calcein violet-AM and SYTOX-green are used for measuring cell viability or cell death and to capture information about the susceptibility of the whole population and not just those bacteria that can grow in media postexposure. Postexposure to the antibiotic, the method gives a rapid readout of drug susceptibility, as well as insights into the concentration and time-dependent drug activity following antibiotic exposure.

Original languageEnglish
Title of host publicationMethods in Molecular Biology
PublisherHumana Press Inc.
Pages51-57
Number of pages7
DOIs
Publication statusPublished - 2018

Publication series

NameMethods in Molecular Biology
Volume1736
ISSN (Print)1064-3745

Keywords

  • Antibiotic susceptibility
  • Calcein violet-AM
  • Flow cytometry
  • Mycobacterium tuberculosis
  • SYTOX-green

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