Evaluation of the GenoType NTM-DR assay performance for the identification and molecular detection of antibiotic resistance in Mycobacterium abscessus complex

PLoS One. 2020 Sep 25;15(9):e0239146. doi: 10.1371/journal.pone.0239146. eCollection 2020.

Abstract

The first objective of this study was to determine the GenoType NTM-DR assay performance for subspecies identification in Mycobacterium abscessus complex isolates. The second objective was to evaluate the GenoType NTM-DR assay ability to detect clarithromycin and amikacin resistance in M. abscessus complex isolates compared with drug susceptibility testing (DST) and PCR sequencing of the erm(41), rrl and rrs genes. The concordance between the GenoType NTM-DR and MLST results concerning subspecies identification was 100%. The wild type and mutated alleles of the rrl and rrs genes were detected by the GenoType NTM-DR assay and PCR sequencing with 100% (115/115) agreement. Similarly, 100% concordance between GenoType NTM-DR and DST was observed for clarithromycin and amikacin testing. Sensitivity for the detection of clarithromycin and amikacin resistance was 100%. The GenoType NTM-DR assay provides a robust and complementary tool to the gold standard methods (MLST and broth microdilution) for subspecies identification and drug resistance detection.

Publication types

  • Comparative Study
  • Evaluation Study

MeSH terms

  • Amikacin / pharmacology
  • Amikacin / therapeutic use
  • Anti-Bacterial Agents / pharmacology*
  • Anti-Bacterial Agents / therapeutic use
  • Clarithromycin / pharmacology
  • Clarithromycin / therapeutic use
  • DNA Mutational Analysis / instrumentation
  • DNA, Bacterial / genetics
  • DNA, Bacterial / isolation & purification
  • Drug Resistance, Bacterial / genetics*
  • Genes, Bacterial / genetics
  • Genotyping Techniques / instrumentation*
  • Humans
  • Microbial Sensitivity Tests / instrumentation*
  • Multilocus Sequence Typing
  • Mutation
  • Mycobacterium Infections, Nontuberculous / drug therapy
  • Mycobacterium Infections, Nontuberculous / microbiology
  • Mycobacterium abscessus / genetics*
  • Mycobacterium abscessus / isolation & purification
  • Polymerase Chain Reaction
  • Reagent Kits, Diagnostic*

Substances

  • Anti-Bacterial Agents
  • DNA, Bacterial
  • Reagent Kits, Diagnostic
  • Amikacin
  • Clarithromycin

Grants and funding

The author(s) received no specific funding for this work.