Accuracy of Phenotypic and Genotypic Testing for Identification of Streptococcus pneumoniae and Description of Streptococcus pseudopneumoniae sp. nov

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ID: 116238
2004
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Abstract
We have identified an unusual group of viridans group streptococci that resemble Streptococcus pneumoniae . DNA-DNA homology studies suggested that a subset of these isolates represent a novel species that may be included in the S. oralis- S. mitis group of viridans group streptococci. We suggest that this novel species be termed Streptococcus pseudopneumoniae . A combination of phenotypic and genetic reactions allows its identification. S. pseudopneumoniae strains do not have pneumococcal capsules, are resistant to optochin (inhibition zones, less than 14 mm) when they are incubated under an atmosphere of increased CO2 but are susceptible to optochin (inhibition zones, >14 mm) when they are incubated in ambient atmospheres, are not soluble in bile, and are positive by the GenProbe AccuProbe Pneumococcus test. The bile solubility test is more specific than the optochin test for identification of S. pneumoniae . Genetic tests for pneumolysin ( ply ) and manganese-dependent superoxide dismutase ( sodA ) and identification tests with a commercial probe, AccuProbe Pneumococcus, do not discriminate between the new species and S. pneumoniae .
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Authors Judy C. Arbique;Claire Poyart;Patrick Trieu-Cuot;Gilles Quesne;Maria da Glória S. Carvalho;Arnold G. Steigerwalt;Roger E. Morey;Delois Jackson;Ross J. Davidson;Richard R. Facklam;Judy C. Arbique;Claire Poyart;Patrick Trieu-Cuot;Gilles Quesne;Maria da Glória S. Carvalho;Arnold G. Steigerwalt;Roger E. Morey;Delois Jackson;Ross J. Davidson;Richard R. Facklam;
Journal Journal of clinical microbiology
Year 2004
DOI
10.1128/JCM.42.10.4686-4696.2004
URL
http://dx.doi.org/10.1128/JCM.42.10.4686-4696.2004
Keywords
National Center for Biotechnology Information NCBI NLM MEDLINE RNA humans pubmed abstract nih national institutes of health national library of medicine DNA Ribosomal 16S / genetics Sequence Analysis phenotype Evaluation Study Ribosomal / analysis Molecular Sequence Data Phylogeny Genotype culture media species specificity nucleic acid hybridization streptococcus pneumoniae / genetics* bacterial typing techniques* quinine / pharmacology streptococcus pneumoniae / classification* solubility streptococcus pneumoniae / growth & development pmid:15472328 pmc522306 doi:10.1128/jcm.42.10.4686-4696.2004 judy c arbique claire poyart richard r facklam bile quinine / analogs & derivatives* viridans streptococci / classification* viridans streptococci / genetics* viridans streptococci / growth & development

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