Differentiation of Streptococcus pneumoniae from Nonpneumococcal Streptococci of the Streptococcus mitis Group by Matrix-Assisted Laser Desorption Ionization–Time of Flight Mass Spectrometry

Abstract excerpt

The differentiation of species within the Streptococcus mitis group has posed a problem in the routine diagnostic microbiology laboratory for some time. It also constitutes a major weakness of recently introduced matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) fingerprinting systems. As the phylogenetic resolution of the spectral similarity measures employed by these...

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