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  • Title: In vitro activity of bedaquiline against slow-growing nontuberculous mycobacteria.
    Author: Martin A, Godino IT, Aguilar-Ayala DA, Mathys V, Lounis N, Villalobos HR.
    Journal: J Med Microbiol; 2019 Aug; 68(8):1137-1139. PubMed ID: 31210631.
    Abstract:
    Bedaquiline (BDQ) is a recently approved antibiotic for the treatment of multidrug-resistant tuberculosis, but its potential against slow-growing mycobacteria (SGM) is still unknown. The objective of this study was to determine the in vitro activity of BDQ on SGM by assessing their MIC and minimal bactericidal concentration (MBC). The MIC of BDQ against 17 clinical isolates including Mycobacterium avium, Mycobacterium intracellulare, Mycobacterium chimaera, Mycobacterium kansasii and Mycobacterium simiae species was determined by the resazurin microtitre assay and the MBC by the c.f.u. determination on 7H10 agar plates. BDQ has a bacteriostatic activity on all SGM tested with a MIC range from 0.03 to 0.007 µg ml-1 and surprisingly a good bactericidal activity on the majority of the isolates tested with an MBC of 1-2 µg ml-1 . Based on these preliminary results BDQ seems to be very promising for treatment of diseases caused by SGM.
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