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Int J Syst Evol Microbiol. 2019 Dec;69(12):3824-3829. doi: 10.1099/ijsem.0.003690.

Bacteroides faecalis sp. nov., isolated from human faeces.

Author information

1
Korean Collection for Type Cultures, Korea Research Institute of Bioscience and Biotechnology, Jeongeup-si, Republic of Korea.
2
Seoul National University Bundang Hospital, 82 Gumi-ro, 173 Beon-gil, Bundang-Gu, Seongnam-si, Gyeonggi-do, Republic of Korea.
3
ChunLab, Inc., 2477 Nambusunhwan-ro, Seocho-gu, Republic of Korea.
4
University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon, Republic of Korea.

Abstract

A novel Gram-stain-negative and strictly anaerobic bacterial strain, designated KGMB02408T, was isolated from faeces of a healthy human in the Republic of Korea. The isolate was characterized as non-motile, non-spore-forming and rod-shaped (variable in length). The results of phylogenetic analysis based on 16S rRNA gene sequences revealed that strain KGMB02408T belonged to the genus Bacteroides and was most closely related to Bacteroides faecichinchillae JCM 17102T (=KCTC 15666T; 96.5 %). Based on its whole-genome sequence, the DNA G+C content of the isolate was 39.5 mol%. The average nucleotide identity value between strain KGMB02408T and related species, B. faecichinchillae JCM 17102T, was 93.8 %. The major cellular fatty acids (>10 %) of the isolate were anteiso-C15 : 0, iso-C17 : 0-OH, summed feature 11 (iso-C17 : 0-OH and/or C18 : 2 DMA) and C16 : 0. Menaquinone-8 (28.6 %) and menaquinone-10 (47.1 %) were detected as the major respiratory quinones in the isolate. The major end products of glucose fermentation produced by strain KGMB02408T were lactic acid, acetic acid and formic acid. Based on its phylogenetic, phenotypic and chemotaxonomic characteristics, strain KGMB02408T represents a novel species of the genus Bacteroides in the family Bacteroidaceae. The type strain is KGMB02408T (=KCTC 15687T=DSM 107828T).

KEYWORDS:

Bacteroides faecalis; human faeces; microbiota; taxonomy

PMID:
31511127
DOI:
10.1099/ijsem.0.003690

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