期刊
SYSTEMATIC AND APPLIED MICROBIOLOGY
卷 29, 期 4, 页码 292-299出版社
ELSEVIER GMBH, URBAN & FISCHER VERLAG
DOI: 10.1016/j.syapm.2005.11.001
关键词
Clostridium asparagiforme sp nov.; faecal microbiota; 16S rRNA; gyrB; phylogeny; taxonomy
An obligatory anaerobic, Gram-positive, rod-shaped organism was isolated from faeces of a healthy human donor. It was characterized using biochemical, phenotypic and molecular taxonomic methods. The organism produced acetate, lactate, and ethanol as the major products of glucose fermentation. The G+C content was 53 mol%. Based on comparative 16S rRNA gene sequencing, the unidentified bacterium is a member of the Clostridium subphylum of the Gram-positive bacteria, and most closely related to species of the Clostridium coccoides cluster (rRNA cluster XIVa) [M.D. Collins et al., The phylogeny of the genus Clostridium: proposal of five new genera and eleven new species combinations, Int. J. Syst. Bacteriol. 44 (1994) 812-826]. Clostridium bolteae and Clostridium clostridioforme were identified as the most closely related described species. A 16S rRNA sequence divergence value of > 3% suggested that the isolate represents a new species. This was also supported by the gyrase-encoding gyrB gene sequences. Based on these findings, we propose the novel bacterium from human faeces to be classified as a new species, Clostridium asparagiforme. The type strain of C asparagiforme is N6 (DSM 15981 and CCUG 48471).(1) (c) 2005 Elsevier GmbH. All rights reserved.
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