title: Streptococcus peroris sp. nov. and Streptococcus infantis sp. nov., new members of the Streptococcus mitis group, isolated from human clinical specimens.
abstract: Taxonomic studies were performed on eight strains of alpha-haemolytic streptococci that showed very low DNA-DNA hybridization similarity values with all established members of the mitis group of the genus Streptococcus. These strains were isolated from the tooth surface and pharynx of humans. 16S rRNA gene sequence analysis showed that these strains belonged to the mitis group, but that they fell into two new branches. DNA-DNA hybridization demonstrated two new similarity groups. From the results of the present study, the names Streptococcus peroris sp. nov. and Streptococcus infantis sp. nov. are proposed for these new groups. The type strains are O-66T (= GTC 848T = JCM 10158T) and O-122T (= GTC 849T = JCM 10157T), respectively.
authors.affiliation: Department of Microbiology, Gifu University School of Medicine, Japan. kawamura@cc.gifu.u.ac.jp
authors.forename: Y
authors.initials: Y
authors.lastname: Kawamura
authors.forename: X G
authors.initials: XG
authors.lastname: Hou
authors.forename: Y
authors.initials: Y
authors.lastname: Todome
authors.forename: F
authors.initials: F
authors.lastname: Sultana
authors.forename: K
authors.initials: K
authors.lastname: Hirose
authors.forename: S E
authors.initials: SE
authors.lastname: Shu
authors.forename: T
authors.initials: T
authors.lastname: Ezaki
authors.forename: H
authors.initials: H
authors.lastname: Ohkuni
mesh_terms: D001482:Base Composition; D001483:Base Sequence; D002675:Child, Preschool; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000737:chemistry; D006801:Humans; D007223:Infant; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D013291:Streptococcus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S