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Melting the eis : Nondetection of Kanamycin Resistance Markers by Routine Diagnostic Tests and Identification of New eis Promoter Variants

promoter mutations can confer reduced Mycobacterium tuberculosis kanamycin susceptibility. GenoType MTBDR a widely used assay evaluating this region, wrongly classified 17/410 isolates as promoter wild type. Six out of seventeen isolates harbored mutations known to confer kanamycin resistance, and t...

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Published in:Antimicrobial agents and chemotherapy 2021-06, Vol.65 (7), p.e0250220-e0250220
Main Authors: Ley, Serej D, Pillay, Samantha, Streicher, Elizabeth M, van der Heijden, Yuri F, Sirgel, Frederik, Derendinger, Brigitta, de Kock, Marianna, Gagneux, Sébastien, Warren, Robin M, Theron, Grant, de Vos, Margaretha
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container_issue 7
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container_title Antimicrobial agents and chemotherapy
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creator Ley, Serej D
Pillay, Samantha
Streicher, Elizabeth M
van der Heijden, Yuri F
Sirgel, Frederik
Derendinger, Brigitta
de Kock, Marianna
Gagneux, Sébastien
Warren, Robin M
Theron, Grant
de Vos, Margaretha
description promoter mutations can confer reduced Mycobacterium tuberculosis kanamycin susceptibility. GenoType MTBDR a widely used assay evaluating this region, wrongly classified 17/410 isolates as promoter wild type. Six out of seventeen isolates harbored mutations known to confer kanamycin resistance, and the remainder harbored either novel promoter mutations (7/11) or disputed mutations (4/11). GenoType MTBDR can miss established and new variants that cause reduced susceptibility. These data highlight the importance of reflex phenotypic kanamycin testing.
doi_str_mv 10.1128/AAC.02502-20
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source American Society for Microbiology Journals; PubMed Central
subjects Antitubercular Agents - pharmacology
Antitubercular Agents - therapeutic use
Diagnostic Tests, Routine
Drug Resistance, Multiple, Bacterial
Genotype
Humans
Kanamycin - pharmacology
Kanamycin Resistance - genetics
Mechanisms of Resistance
Microbial Sensitivity Tests
Mutation - genetics
Mycobacterium tuberculosis - genetics
Tuberculosis, Multidrug-Resistant - diagnosis
Tuberculosis, Multidrug-Resistant - drug therapy
Tuberculosis, Multidrug-Resistant - genetics
title Melting the eis : Nondetection of Kanamycin Resistance Markers by Routine Diagnostic Tests and Identification of New eis Promoter Variants
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