Determination of 16S rRNA Sequences of Streptococcus mitis and Streptococcus gordonii and Phylogenetic Relationships among Members of the Genus Streptococcus

作者：Yutaka Kawamura, X.-G. Hou, Farjana Sultana, Hiroaki Miura, T. EZAKI · 发表于：International Journal of Systematic Bacteriology · 年份：1995 · DOI：10.1099/00207713-45-2-406 · 被引用次数：503 · 研究领域：Streptococcal Infections and Treatments、Bacterial Identification and Susceptibility Testing、Genomics and Phylogenetic Studies

We determined the 16S rRNA sequences of the type strains of Streptococcus mitis and Streptococcus gordonii and calculated the phylogenetic distances between those organisms and other members of the genus Streptococcus. The viridans group streptococci were separated into five phylogenetic groups; we named these groups the anginosus group, the mitis group, the salivarius group, the bovis group, and the mutans group. S. mitis and S. gordonii clustered in the mitis group together with Streptococcus pneumoniae, Streptococcus oralis, Streptococcus sanguis, and Streptococcus parasanguis at levels of sequence homology of more than 96%. Within this group, S. mitis, S. oralis, and S. pneumoniae exhibited more than 99% sequence homology with each other, although the DNA-DNA similarity values for their total chromosome DNAs were less than 60%.