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  • Title: Bifidobacterium faecale sp. nov., isolated from human faeces.
    Author: Choi JH, Lee KM, Lee MK, Cha CJ, Kim GB.
    Journal: Int J Syst Evol Microbiol; 2014 Sep; 64(Pt 9):3134-3139. PubMed ID: 24944342.
    Abstract:
    A novel strain, designated strain CU3-7(T), 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 CU3-7(T) was phylogenetically affiliated with members of the genus Bifidobacterium. Strain CU3-7(T) showed the highest level of sequence similarity with Bifidobacterium adolescentis KCTC 3216(T) (98.4 %), followed by Bifidobacterium ruminantium KCTC 3425(T) (97.9 %). Analysis of hsp60 sequences showed that strain CU3-7(T) was closely related to B. adolescentis KCTC 3216(T) (94.0 %) and B. ruminantium KCTC 3425(T) (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 3425(T) and 14.9 % with B. adolescentis KCTC 3216(T). 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 CU3-7(T) 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 17904(T) = JCM 19861(T)).
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