title: Bacteroides plebeius sp. nov. and Bacteroides coprocola sp. nov., isolated from human faeces.
abstract: Nine strains of Gram-negative, anaerobic rod were isolated from human faeces. Based on phylogenetic analysis and specific phenotypic characteristics, these strains were included within the Bacteroides cluster and were divided into two clusters. Strains from the two clusters showed 16S rRNA gene sequence similarities of 90.4 and 92.7% to the nearest recognized species, Bacteroides vulgatus. The strains also formed two clusters exhibiting a 16S rRNA gene sequence divergence of approximately 6%. DNA-DNA hybridization studies confirmed that the two novel strain clusters were distinct from each other. Based on the phenotypic and phylogenetic findings, two novel species, Bacteroides plebeius sp. nov. and Bacteroides coprocola sp. nov., are proposed, each representing one of the two strain clusters. The DNA G+C content of the type strains were 43.9 mol% for B. plebeius (M12(T)=JCM 12973(T)=DSM 17135(T)) and 42.4 mol% for B. coprocola (M16(T)=JCM 12979(T)=DSM 17136(T)).
authors.affiliation: Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Wako, Saitama 351-0198, Japan.
authors.forename: Maki
authors.initials: M
authors.lastname: Kitahara
authors.affiliation: Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Wako, Saitama 351-0198, Japan.
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Sakamoto
authors.affiliation: Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Wako, Saitama 351-0198, Japan.
authors.forename: Masako
authors.initials: M
authors.lastname: Ike
authors.affiliation: Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Wako, Saitama 351-0198, Japan.
authors.forename: Shinji
authors.initials: S
authors.lastname: Sakata
authors.affiliation: Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Center, Wako, Saitama 351-0198, Japan.
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Benno
mesh_terms: D015373:Bacterial Typing Techniques; D001439:Bacteroides / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D001482:Base Composition; D004269:DNA, Bacterial / Q000032:analysis; D004275:DNA, Ribosomal / Q000032:analysis; D005243:Feces / Q000382:microbiology*; D020459:Genes, rRNA; D006801:Humans; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010641:Phenotype; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S