1. Bifidobacterium faecale sp. nov., isolated from human faeces
- Author
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Myung-Ki Lee, Kyung Min Lee, Chang-Jun Cha, Geun-Bae Kim, and Jung-Hye Choi
- Subjects
DNA, Bacterial ,Sequence analysis ,Molecular Sequence Data ,medicine.disease_cause ,Microbiology ,Feces ,Nucleic acid thermodynamics ,RNA, Ribosomal, 16S ,medicine ,Humans ,Phylogeny ,Ecology, Evolution, Behavior and Systematics ,Aldehyde-Lyases ,Bifidobacterium ,Base Composition ,biology ,Fatty Acids ,Infant, Newborn ,Nucleic Acid Hybridization ,Chaperonin 60 ,Sequence Analysis, DNA ,General Medicine ,Ribosomal RNA ,16S ribosomal RNA ,biology.organism_classification ,Bacterial Typing Techniques ,Bifidobacterium ruminantium ,Phosphoketolase activity - Abstract
A novel strain, designated strain CU3-7T, was isolated from faeces of a two-week-old baby. The isolate was Gram-staining-positive, anaerobic and rod-shaped. Results from 16S rRNA gene sequence analysis revealed that strain CU3-7T was phylogenetically affiliated with members of the genus Bifidobacterium . Strain CU3-7T showed the highest level of sequence similarity with Bifidobacterium adolescentis KCTC 3216T (98.4 %), followed by Bifidobacterium ruminantium KCTC 3425T (97.9 %). Analysis of hsp60 sequences showed that strain CU3-7T was closely related to B. adolescentis KCTC 3216T (94.0 %) and B. ruminantium KCTC 3425T (92.5 %). The DNA–DNA hybridization values with the closely related strains were all below the cut-off value for species delineation, 17.0 % with B. ruminantium KCTC 3425T and 14.9 % with B. adolescentis KCTC 3216T. Fructose-6-phosphate phosphoketolase activity was detected. The predominant cellular fatty acids were C16 : 0 (27.7 %), C18 : 1ω9c (27.4 %) and C18 : 1ω9c dimethylacetate (15.5 %). The DNA G+C content was 58.6 mol%. On the basis of polyphasic taxonomy, strain CU3-7T should be classified as the type strain of a novel species within the genus Bifidobacterium , for which the name Bifidobacterium faecale sp. nov. is proposed ( = KACC 17904T = JCM 19861T).
- Published
- 2014
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