Detection of mutations conferring resistance to linezolid in Enterococcus spp. by fluorescence in situ hybridization

J Clin Microbiol. 2007 Oct;45(10):3421-3. doi: 10.1128/JCM.00179-07. Epub 2007 May 2.

Abstract

A fluorescence in situ hybridization (FISH) assay was established to detect linezolid resistance (conferred by the mutation 2576G>T in the gene coding for the 23 string of the ribosomal RNA) in enterococci. The assay was evaluated with 106 Enterococcus isolates; it showed a sensitivity of 100% for the detection of phenotypic resistance and was even able to identify a single mutated allele in phenotypically linezolid-susceptible isolates.

MeSH terms

  • Acetamides / pharmacology*
  • Anti-Infective Agents / pharmacology*
  • Drug Resistance, Bacterial / genetics*
  • Enterococcus / drug effects*
  • Enterococcus / genetics
  • In Situ Hybridization, Fluorescence / methods*
  • Linezolid
  • Microbial Sensitivity Tests
  • Mutation*
  • Oxazolidinones / pharmacology*
  • RNA, Ribosomal, 23S / genetics
  • Sensitivity and Specificity

Substances

  • Acetamides
  • Anti-Infective Agents
  • Oxazolidinones
  • RNA, Ribosomal, 23S
  • Linezolid