Genotypic characterization of multi-drug-resistant Mycobacterium tuberculosis isolates in Myanmar

Journal of Infection and Chemotherapy : Official Journal of the Japan Society of Chemotherapy
Khin Saw AyeYasuhiko Suzuki

Abstract

The number of multi-drug-resistant tuberculosis (MDR-TB) cases is rising worldwide. As a countermeasure against this situation, the implementation of rapid molecular tests to identify MDR-TB would be effective. To develop such tests, information on the frequency and distribution of mutations associating with phenotypic drug resistance in Mycobacterium tuberculosis is required in each country. During 2010, the common mutations in the rpoB, katG and inhA of 178 phenotypically MDR M. tuberculosis isolates collected by the National Tuberculosis Control Program (NTP) in Myanmar were investigated by DNA sequencing. Mutations affecting the 81-bp rifampicin (RIF) resistance-determining region (RRDR) of the rpoB were identified in 127 of 178 isolates (71.3%). Two of the most frequently affected codons were 531 and 526, with percentages of 48.3% and 14.0% respectively. For isoniazid (INH) resistance, 114 of 178 MDR-TB isolates (64.0%) had mutations in the katG in which a mutation-conferring amino acid substitution at codon 315 from Ser to Thr was the most common. Mutations in the inhA regulatory region were also detected in 20 (11.2%) isolates, with the majority at position -15. Distinct mutation rate and pattern from surrounding countri...Continue Reading

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Citations

Jan 17, 2019·Future Microbiology·Katiany R Caleffi-FerracioliFernando R Pavan
Mar 12, 2020·Infection and Drug Resistance·Ratchanu CharoenpakChankit Puttilerpong
May 15, 2018·Frontiers in Cellular and Infection Microbiology·H M Adnan HameedTianyu Zhang
May 18, 2019·Journal of Global Antimicrobial Resistance·Feriel BouzianeUNKNOWN CNR-MyRMA

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