Natural Polymorphisms in Mycobacterium tuberculosis Conferring Resistance to Delamanid in Drug-naïve Patients
Robert J. Wilkinson,
Erik C. Böttger,
Peter M. Keller
Posted 11 Aug 2020
medRxiv DOI: 10.1101/2020.08.07.20167130
Posted 11 Aug 2020
Mutations in the genes of the F420 signaling pathway, including dnn, fgd1, fbiA, fbiB, fbiC, and fbiD, of Mycobacterium tuberculosis (Mtb) complex can lead to delamanid resistance. We searched for such mutations among 129 Mtb strains from Asia, South-America, and Africa using whole-genome sequencing; 70 (54%) strains had at least one mutation in one of the genes. For ten strains with mutations, we determined the minimum inhibitory concentration (MIC) of delamanid. We found one strain from a delamanid-naive patient carrying the natural polymorphism Tyr29del (ddn) that was associated with a critical MIC to delamanid.
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