Comparison of matrix-assisted laser desorption ionization-time-of-flight mass spectrometry assay with conventional methods for detection of IMP-6, VIM-2, NDM-1, SIM-1, KPC-1, OXA-23, and OXA-51 carbapenemase-producing Acinetobacter spp., Pseudomonas aeruginosa, and Klebsiella pneumoniae

Diagn Microbiol Infect Dis. 2013 Nov;77(3):227-30. doi: 10.1016/j.diagmicrobio.2013.07.005. Epub 2013 Aug 28.

Abstract

Matrix-assisted laser desorption ionization-time-of-flight mass spectrometry assay was able to detect carbapenemase producers, including SIM-1 or OXA-51, within 4 hours using 20 μL of 0.5 g/L ertapenem solution as a substrate. This assay is more rapid and accurate than the modified Hodge test and 3-dimensional extract bioassay. Hence, it can be used an alternative test to identify carbapenemase-mediated carbapenem resistance in Gram-negative bacteria.

Keywords: Acinetobacter spp; Carbapenemase; MALDI-TOF MS; OXA; SIM-1.

Publication types

  • Comparative Study
  • Evaluation Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acinetobacter / enzymology*
  • Bacteriological Techniques / methods*
  • Humans
  • Klebsiella pneumoniae / enzymology*
  • Pseudomonas aeruginosa / enzymology*
  • Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / methods*
  • Time Factors
  • beta-Lactamases / analysis*

Substances

  • beta-Lactamases