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• W2619419024 abstract "Mycobacterium tuberculosis (Mtb) encounters stresses during the pathogenesis and treatment of tuberculosis (TB) that can suppress replication of the bacteria and render them phenotypically tolerant to most available drugs. Where studied, the majority of Mtb in the sputum of most untreated subjects with active TB have been found to be nonreplicating by the criterion that they do not grow as colony-forming units (cfus) when plated on agar. However, these cells are viable because they grow when diluted in liquid media. A method for generating such differentially detectable (DD) Mtb in vitro would aid studies of the biology and drug susceptibility of this population, but lack of independent confirmation of reported methods has contributed to skepticism about their existence. Here, we identified confounding artifacts that, when avoided, allowed development of a reliable method of producing cultures of ≥90% DD Mtb in starved cells. We then characterized several drugs according to whether they contribute to the generation of DD Mtb or kill them. Of the agents tested, rifamycins led to DD Mtb generation, an effect lacking in a rifampin-resistant strain with a mutation in rpoB, which encodes the canonical rifampin target, the β subunit of RNA polymerase. In contrast, thioridazine did not generate DD Mtb from starved cells but killed those generated by rifampin." @default.
• W2619419024 created "2017-06-05" @default.
• W2619419024 creator A5000131069 @default.
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• W2619419024 date "2017-05-30" @default.
• W2619419024 modified "2023-10-14" @default.
• W2619419024 title "Rifamycin action on RNA polymerase in antibiotic-tolerant <i>Mycobacterium tuberculosis</i> results in differentially detectable populations" @default.
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• W2619419024 doi "https://doi.org/10.1073/pnas.1705385114" @default.
• W2619419024 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5474769" @default.
• W2619419024 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28559332" @default.
• W2619419024 hasPublicationYear "2017" @default.
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