Performance of the Vitek MS v2.0 System in Distinguishing Streptococcus pneumoniae from Nonpneumococcal Species of the Streptococcus mitis Group

Author:

Branda John A.12,Markham Rachelle P.1,Garner Cherilyn D.3,Rychert Jenna A.12,Ferraro Mary Jane12

Affiliation:

1. Department of Pathology, Massachusetts General Hospital

2. Harvard Medical School, Boston, Massachusetts, USA

3. R&D Microbiology, bioMérieux, Inc., Hazelwood, Missouri, USA

Abstract

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.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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