MALDI-TOF mass spectrometry for differentiation between Streptococcus pneumoniae and Streptococcus pseudopneumoniae

Joffrey van Prehn*, Suzanne Q. van Veen, Jacqueline J.G. Schelfaut, Els Wessels

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


We compared the Vitek MS and Microflex MALDI-TOF mass spectrometry platform for species differentiation within the Streptococcus mitis group with PCR assays targeted at lytA, Spn9802, and recA as reference standard. The Vitek MS correctly identified 10/11 Streptococcus pneumoniae, 13/13 Streptococcus pseudopneumoniae, and 12/13 S. mitis/oralis. The Microflex correctly identified 9/11 S. pneumoniae, 0/13 S. pseudopneumoniae, and 13/13 S. mitis/oralis. MALDI-TOF is a powerful tool for species determination within the mitis group. Diagnostic accuracy varies depending on platform and database used.

Original languageEnglish
Pages (from-to)9-11
Number of pages3
JournalDiagnostic microbiology and infectious disease
Issue number1
Publication statusPublished - 1 May 2016

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