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Reappraisal of the taxonomy of the Streptococcus bovis/Streptococcus equinus complex and related species: description of Streptococcus gallolyticus subsp. gallolyticus subsp. nov., S. gallolyticus subsp. macedonicus subsp. nov. and S. gallolyticus subsp. pasteurianus subsp. nov.
- Source :
-
International journal of systematic and evolutionary microbiology [Int J Syst Evol Microbiol] 2003 May; Vol. 53 (Pt 3), pp. 631-645. - Publication Year :
- 2003
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Abstract
- 'Streptococcus bovis/Streptococcus equinus' is a large bacterial complex including different species frequently isolated from infections of humans (Streptococcus gallolyticus, Streptococcus infantarius) or animals (S. bovis, S. equinus, Streptococcus alactolyticus). The separation of S. bovis into three different biotypes has been partially correlated with genetic differentiation. In addition, recent advances in bacterial phylogeny have led to the inclusion of Streptococcus macedonicus and Streptococcus waius in this complex. The aim of this study was to improve physiological differentiation between species related to the complex and to clarify their respective phylogenetic positions. In this study, physiological, genetic and phylogenetic analyses of a set of 88 streptococcal strains were performed. The diversity of strains of S. bovis biotype II was analysed, and it was confirmed that they belong to different species, either S. equinus or S. infantarius. It was demonstrated that S. gallolyticus, S. bovis biotype II.2, S. macedonicus and S. waius form a single DNA cluster separated into three different subspecies. They are delineated by different biochemical traits, limited DNA-DNA relatedness and noticeable divergence in 16S rDNA sequences. According to the current definition of species, the names S. gallolyticus subsp. gallolyticus subsp. nov., S. gallolyticus subsp. pasteurianus subsp. nov. and S. gallolyticus subsp. macedonicus subsp. nov. are proposed for these three subspecies.
- Subjects :
- Animals
Bacterial Typing Techniques
Cattle
DNA, Ribosomal analysis
Genes, rRNA
Humans
Molecular Sequence Data
Nucleic Acid Hybridization
Phenotype
Phylogeny
RNA, Ribosomal, 16S genetics
Sequence Analysis, DNA
Streptococcal Infections microbiology
Streptococcus genetics
Streptococcus physiology
Streptococcus bovis genetics
Streptococcus bovis physiology
Streptococcus classification
Streptococcus bovis classification
Subjects
Details
- Language :
- English
- ISSN :
- 1466-5026
- Volume :
- 53
- Issue :
- Pt 3
- Database :
- MEDLINE
- Journal :
- International journal of systematic and evolutionary microbiology
- Publication Type :
- Academic Journal
- Accession number :
- 12807180
- Full Text :
- https://doi.org/10.1099/ijs.0.02361-0