A Gram-negative, strictly anaerobic, non-spore forming, non-motile, non-pigmented bacterial strain, designated H184, was isolated from human faeces. 16S rRNA gene sequence analysis showed that strain H184 represents a member of the genus Butyricimonas. Strain H184 is related to but distinct from Butyricimonasvirosa JCM 15149 and Butyricimonasparavirosa JCM 18677, with 16S rRNA gene sequence similarities of 96.32 and 96.24 %, respectively. Strain H184 shared 90.50 % hsp60 gene sequence similarity to B. virosa JCM 15149 and B. paravirosa JCM 18677. Growth occurs between 25 and 42 °C with an optimum at 37 °C. Bile and NaCl concentration range allowing growth are 0-3.75 % and 0-1.8 %, respectively. pH range for growth is 5.5-8. The strain produced propionate as the major end product from glucose. The major cellular fatty acids of strain H184 were iso-C15 : 0 (63.5 %) and iso-C17 : 0 3-OH (12.8%). The major menaquinone of the strain was MK-10 (86 %). DNA G+C content of the isolate H184 was 44.2 mol%. The genome-based comparison between strain H184 and B. virosa JCM 15149 by pairwise average nucleotide identity indicated a clear distinction with a score of 87.22. On the basis of these data, strain H184 represents a novel species of the genus Butyricimonas, for which the name Butyricimonas faecalis sp. nov. is proposed. The type strain of B. faecalis is H184 (DSM 106867, LMG 30602).
Le Roy, T., Van Der Smissen, P., Paquot, A., Delzenne, N., Muccioli, G., Collet, J.-F., & Cani, P. (2019). Butyricimonas faecalis sp. nov., isolated from human faeces and emended description of the genus Butyricimonas. International journal of systematic and evolutionary microbiology, 69(3), 833-838. https://doi.org/10.1099/ijsem.0.003249 (Original work published 2019)