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  • 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.
    Author: Woo PC, Teng JL, Leung KW, Lau SK, Woo GK, Wong AC, Wong MK, Yuen KY.
    Journal: Microbiol Immunol; 2005; 49(1):31-9. PubMed ID: 15665451.
    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.
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