Hardham, JM. et al., 2008. Transfer of Bacteroides splanchnicus to Odoribacter gen. nov. as Odoribacter splanchnicus comb. nov., and description of Odoribacter denticanis sp. nov., isolated from the crevicular spaces of canine periodontitis patients. International journal of systematic and evolutionary microbiology, 58(Pt 1), pp. 103–9

Show abstract

Numerous novel anaerobic bacteria were isolated from the crevicular spaces of dogs with periodontitis. The phenotypic characteristics of these bacterial isolates indicated that they were similar to members of the genus Porphyromonas. However, comparison of the 16S rRNA gene sequences of the isolates indicated that they were related to members of the Bacteroides splanchnicus subgroup. A representative of the novel isolates, strain B106(T), induced alveolar bone loss in a mouse model of experimental periodontal disease. Based on biochemical, morphological, molecular phylogenetic, and pathogenic evidence, it is proposed that the taxonomic subgroup containing these novel isolates and B. splanchnicus should be classified in a new genus, Odoribacter gen. nov., within the family 'Porphyromonadaceae'. In addition, it is proposed that B. splanchnicus should be reclassified as Odoribacter splanchnicus comb. nov., and that the newly identified isolates should be classified as representing Odoribacter denticanis sp. nov., the type strain of which is B106(T) (=ATCC PTA-3625(T)=CNCM I-3225(T)).

Paster, BJ. et al., 1994. Phylogeny of Bacteroides, Prevotella, and Porphyromonas spp. and related bacteria. Journal of bacteriology, 176(3), pp. 725–32; Free Article

Show abstract

The phylogenetic structure of the bacteroides subgroup of the cytophaga-flavobacter-bacteroides (CFB) phylum was examined by 16S rRNA sequence comparative analysis. Approximately 95% of the 16S rRNA sequence was determined for 36 representative strains of species of Prevotella, Bacteroides, and Porphyromonas and related species by a modified Sanger sequencing method. A phylogenetic tree was constructed from a corrected distance matrix by the neighbor-joining method, and the reliability of tree branching was established by bootstrap analysis. The bacteroides subgroup was divided primarily into three major phylogenetic clusters which contained most of the species examined. The first cluster, termed the prevotella cluster, was composed of 16 species of Prevotella, including P. melaninogenica, P. intermedia, P. nigrescens, and the ruminal species P. ruminicola. Two oral species, P. zoogleoformans and P. heparinolytica, which had been recently placed in the genus Prevotella, did not fall within the prevotella cluster. These two species and six species of Bacteroides, including the type species B. fragilis, formed the second cluster, termed the bacteroides cluster. The third cluster, termed the porphyromonas cluster, was divided into two subclusters. The first contained Porphyromonas gingivalis, P. endodontalis, P. asaccharolytica, P. circumdentaria, P. salivosa, [Bacteroides] levii (the brackets around genus are used to indicate that the species does not belong to the genus by the sensu stricto definition), and [Bacteroides] macacae, and the second subcluster contained [Bacteroides] forsythus and [Bacteroides] distasonis. [Bacteroides] splanchnicus fell just outside the three major clusters but still belonged within the bacteroides subgroup. With few exceptions, the 16 S rRNA data were in overall agreement with previously proposed reclassifications of species of Bacteroides, Prevotella, and Porphyromonas. Suggestions are made to accommodate those species which do not fit previous reclassification schemes.