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Peptostreptococcus russellii sp. nov., isolated from a swine-manure storage pit.

Journal article
Authors Terence R Whitehead
Michael A Cotta
Enevold Falsen
Edward R.B. Moore
Paul A Lawson
Published in International journal of systematic and evolutionary microbiology
Volume 61
Issue 8
Pages 1875-1879
ISSN 1466-5034
Publication year 2011
Published at Institute of Biomedicine, Department of Infectious Medicine
Pages 1875-1879
Language en
Keywords Peptostreptococcus russellii, Firmicutes, swine manure, 16S rRNA, cell fatty acids, peptidoglycan
Subject categories Molecular biology, Microbiology


A polyphasic taxonomic study was performed on seven strains of an unknown Gram-positive, nonspore-forming, obligately anaerobic coccus-shaped bacterium isolated from a swine-manure storage pit. Comparative 16S rRNA gene sequencing confirmed that all these isolates were highly related to each other and formed a hitherto unknown linage within the clostridial rRNA XI cluster of organisms. Pairwise analysis demonstrated that the novel organism to be most closely related to Peptostreptococcus anaerobius and Peptostreptococcus stomatis with 16S rDNA gene sequence similarity values of 95.5% and 93.0%, respectively. The peptidoglycan type of the cell wall was determined to be A4α L-Lys-D-Asp with glucose, xylose and traces of mannose as the cell wall sugars. Based on biochemical, chemotaxomonic, and phylogenetic evidence it is proposed that the unknown bacterium be classified as a new species, Peptostreptococcus russellii sp. nov. The type strain is RT-10BT (=CCUG 58235T = NRRL B-59380T= DSM 23041T).

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