title: Anaerospora hongkongensis gen. nov. sp. nov., a novel genus and species with ribosomal DNA operon heterogeneity isolated from an intravenous drug abuser with pseudobacteremia.
abstract: A bacterium was isolated from the blood culture of an intravenous drug abuser with pseudobacteremia. The cells were strictly anaerobic, straight or slightly curved, sporulating, Gram-negative rods. It grew on sheep blood agar as non-hemolytic, pinpoint colonies after 48 hr of incubation at 37 C in an anaerobic environment. It was motile but did not produce catalase or cytochrome oxidase. 16S ribosomal DNA (rDNA) sequencing revealed three different copies of 16S rDNA sequences. More than 90% of the differences among them were due to differences in the lengths of the sequences. Phylogenetically, the bacterium is clustered with Dendrosporobacter, Sporomusa, and Propionispora, the other three genera of anaerobic, sporulating, Gram-negative rods. There were 8.6-11.1% differences between the 16S rDNA sequences of the bacterium and that of D. quercicolus, 4.7-15.1% differences between the 16S rDNA sequences of it and those of S. acidovorans, S. aerivorans, S. malonica, S. ovata, S. paucivorans, S. silvacetica, S. spaeroides, and S. termitida, and 7.6-13.1% differences between the 16S rDNA sequences of it and those of P. hippei and P. vibrioides. The G+C content of the bacterium (mean +/- SD) was 46.8 +/- 3.2%. For these reasons, a new genus and species, Anaerospora hongkongensis gen. nov. sp. nov., is proposed, for which HKU15T is the type strain.
authors.affiliation: Department of Microbiology, The University of Hong Kong, University Pathology Building, Queen Mary Hospital Compound, Hong Kong.
authors.forename: Patrick C Y
authors.initials: PC
authors.lastname: Woo
authors.forename: Jade L L
authors.initials: JL
authors.lastname: Teng
authors.forename: Kit-Wah
authors.initials: KW
authors.lastname: Leung
authors.forename: Susanna K P
authors.initials: SK
authors.lastname: Lau
authors.forename: Gibson K S
authors.initials: GK
authors.lastname: Woo
authors.forename: Amy C Y
authors.initials: AC
authors.lastname: Wong
authors.forename: Michelle K M
authors.initials: MK
authors.lastname: Wong
authors.forename: Kwok-Yung
authors.initials: KY
authors.lastname: Yuen
mesh_terms: D000328:Adult; D000693:Anaerobiosis; D016470:Bacteremia / Q000150:complications / Q000382:microbiology*; D001482:Base Composition; D001483:Base Sequence; D001769:Blood / Q000382:microbiology*; D002374:Catalase / Q000032:analysis; D002681:China; D004269:DNA, Bacterial / Q000737:chemistry / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000737:chemistry / Q000302:isolation & purification; D003576:Electron Transport Complex IV / Q000032:analysis; D020459:Genes, rRNA; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D009068:Movement; D010459:Peptococcaceae / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification* / Q000502:physiology; D010802:Phylogeny; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D015819:Substance Abuse, Intravenous / Q000150:complications*; D045854:Veillonellaceae
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D002374:Catalase; D003576:Electron Transport Complex IV