Performance of the Vitek MS v2.0 system in distinguishing Streptococcus pneumoniae from nonpneumococcal species of the Streptococcus mitis group

J Clin Microbiol. 2013 Sep;51(9):3079-82. doi: 10.1128/JCM.00824-13. Epub 2013 Jun 19.

Abstract

The Vitek MS v2.0 matrix-assisted laser desorption ionization-time of flight mass spectrometry system accurately distinguished Streptococcus pneumoniae from nonpneumococcal S. mitis group species. Only 1 of 116 nonpneumococcal isolates (<1%) was misidentified as S. pneumoniae. None of 95 pneumococcal isolates was misidentified. This method provides a rapid, simple means of discriminating among these challenging organisms.

Publication types

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

MeSH terms

  • Diagnostic Errors / statistics & numerical data*
  • Humans
  • Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization / methods*
  • Streptococcal Infections / diagnosis
  • Streptococcal Infections / microbiology*
  • Streptococcus mitis / chemistry
  • Streptococcus mitis / classification*
  • Streptococcus mitis / isolation & purification*
  • Streptococcus pneumoniae / chemistry
  • Streptococcus pneumoniae / classification*
  • Streptococcus pneumoniae / isolation & purification*