Recognition of streptococcus pseudoporcinus colonization in women as a consequence of using matrix-assisted laser desorption ionization-time of flight mass spectrometry for Group B streptococcus identification

Nuntra Suwantarat, Maureen Grundy, Mayer Rubin, Renee Harris, Jo Anne Miller, Mark Romagnoli, Ann Hanlon, Tsigereda Tekle, Brandon C. Ellis, Frank R. Witter, Karen C. Carroll

Research output: Contribution to journalArticle

Abstract

During a 14-month period of using matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) for group B streptococcus (GBS) identification, we recovered 32 (1%) Streptococcus pseudoporcinus isolates from 3,276 GBS screening cultures from female genital sources (25 isolates from pregnant women and 7 from nonpregnant women). An additional two S. pseudoporcinus isolates were identified from a urine culture and a posthysterectomy wound culture. These isolates were found to cross-react with three different GBS antigen agglutination kits, PathoDx (Remel) (93%), Prolex (Pro-Lab Diagnostics) (38%), and Streptex (Remel) (53%). New approaches to bacterial identification in routine clinical microbiology laboratories may affect the prevalence of S. pseudoporcinus.

Original languageEnglish (US)
Pages (from-to)3926-3930
Number of pages5
JournalJournal of clinical microbiology
Volume53
Issue number12
DOIs
StatePublished - Dec 2015

ASJC Scopus subject areas

  • Microbiology (medical)

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