Characterization of Blood Culture Isolates of Streptococcus dysgalactiae subsp. equisimilis Possessing Lancefield's Group A Antigen

Author:

Brandt Claudia M.1,Haase Gerhard1,Schnitzler Norbert1,Zbinden Reinhard2,Lütticken Rudolf1

Affiliation:

1. Institute of Medical Microbiology and National Reference Center for Streptococci, University Hospital RWTH Aachen, Aachen, Germany,1 and

2. Department of Medical Microbiology, University of Zürich, Zürich, Switzerland2

Abstract

ABSTRACT For three human blood culture isolates of beta-hemolytic streptococci with Lancefield's serogroup A antigen, phylogenetic analysis of the 16S rRNA genes confirmed biochemical identification as Streptococcus dysgalactiae subsp. equisimilis . Genes encoding M or M-like proteins, which are considered to be major virulence determinants in streptococci, were detected in all of these strains. Our data clearly demonstrate that for beta-hemolytic streptococci, the species assignment should not be based on the results of serogrouping alone.

Publisher

American Society for Microbiology

Subject

Microbiology (medical)

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5. Classification of blood culture isolates of Streptococcus dysgalactiae subspecies equisimilis possessing Lancefield's group A antigen;Brandt C.;Clin. Microbiol. Infect.,1999

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