title: Dialister invisus sp. nov., isolated from the human oral cavity.
abstract: Six strains of anaerobic, Gram-negative coccobacilli isolated from the root canals of patients with endodontic infections (five strains) and from a deep periodontal pocket (one strain) were subjected to a comprehensive range of phenotypic and genetic tests and were found to comprise a homogeneous group. Following 16S rRNA gene sequence analysis, they were found to be most closely related to Dialister pneumosintes, with 93 % sequence similarity between the two taxa. A novel species, Dialister invisus sp. nov., is proposed. Biochemically, the species is largely unreactive and is asaccharolytic, with only traces of acetate and propionate detected as metabolic end-products. The G+C content of the DNA of D. invisus strains is 45-46 mol%. The type strain is E7.25(T) (=CCUG 47026(T)=DSM 15470(T)).
authors.affiliation: Department of Microbiology, Dental Institute, Floor 28, Guy's Tower, Guy's Hospital, King's College London, London SE1 9RT, UK.
authors.forename: J
authors.initials: J
authors.lastname: Downes
authors.forename: M
authors.initials: M
authors.lastname: Munson
authors.forename: W G
authors.initials: WG
authors.lastname: Wade
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics; D016936:Gram-Positive Endospore-Forming Bacteria / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D006801:Humans; D008854:Microscopy, Electron; D008969:Molecular Sequence Data; D009061:Mouth Mucosa / Q000382:microbiology*; D010802:Phylogeny
chemical_list: D001426:Bacterial Proteins