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recA-based PCR assay for accurate differentiation of streptococcus pneumoniae from other viridans streptococci


Zbinden, A; Köhler, N; Bloemberg, G V (2011). recA-based PCR assay for accurate differentiation of streptococcus pneumoniae from other viridans streptococci. Journal of Clinical Microbiology, 49(2):523-527.

Abstract

Proper identification of Streptococcus pneumoniae by conventional methods remains problematic. The discriminatory power of the 16S rRNA gene, which can be considered the "gold standard" for molecular identification, is too low to differentiate S. pneumoniae from closely related species such as Streptococcus pseudopneumoniae, Streptococcus mitis, and Streptococcus oralis in the routine clinical laboratory. A 313-bp part of recA was selected on the basis of variability within the S. mitis group, showing <95.8% interspecies homology. In addition, 6 signature nucleotides specific for S. pneumoniae were identified within the 313-bp recA fragment. We show that recA analysis is a useful tool for proper identification to species level within the S. mitis group, in particular, for pneumococci.

Abstract

Proper identification of Streptococcus pneumoniae by conventional methods remains problematic. The discriminatory power of the 16S rRNA gene, which can be considered the "gold standard" for molecular identification, is too low to differentiate S. pneumoniae from closely related species such as Streptococcus pseudopneumoniae, Streptococcus mitis, and Streptococcus oralis in the routine clinical laboratory. A 313-bp part of recA was selected on the basis of variability within the S. mitis group, showing <95.8% interspecies homology. In addition, 6 signature nucleotides specific for S. pneumoniae were identified within the 313-bp recA fragment. We show that recA analysis is a useful tool for proper identification to species level within the S. mitis group, in particular, for pneumococci.

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26 citations in Web of Science®
28 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Medical Microbiology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Date:2011
Deposited On:10 Mar 2011 15:42
Last Modified:21 Nov 2017 15:18
Publisher:American Society for Microbiology
ISSN:0095-1137
Publisher DOI:https://doi.org/10.1128/JCM.01450-10
PubMed ID:21147955

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