biostudies-literatureUnknown74(6)Liou JSMinistry of Economic AffairsNational Science and Technology CouncilTwo Gram-stain-negative, straight rods, non-motile, asporogenous, catalase-negative and obligately anaerobic butyrate-producing strains, HLW78<sup>T</sup> and CYL33, were isolated from faecal samples of two healthy Taiwanese adults. Phylogenetic analyses of 16S rRNA and DNA mismatch repair protein MutL (<i>mutL</i>) gene sequences revealed that these two novel strains belonged to the genus <i>Faecalibacterium</i>. On the basis of 16S rRNA and <i>mutL</i> gene sequence similarities, the type strains <i>Faecalibacterium butyricigenerans</i> AF52-21<sup>T</sup>(98.3-98.1 % and 79.0-79.5 % similarity), <i>Faecalibacterium duncaniae</i> A2-165<sup>T</sup>(97.8-97.9 % and 70.9-80.1 %), <i>Faecalibacterium hattorii</i> APC922/41-1<sup>T</sup>(97.1-97.3 % and 80.3-80.5 %), <i>Faecalibacterium longInternational journal of systematic and evolutionary microbiologyhttps://www.ebi.ac.uk/biostudies/studies/S-EPMC11261667biostudies-literature<i>Faecalibacterium taiwanense</i> sp. nov., isolated from human faeces.PMC11261667113-EC-17-A-22–0643113-EC-17-A-22–0525112-2740-B-A49-002112-2320-B-080–001Hamada MMori KHsu LWChen CCWang YTHuang CHWatanabe KHuang LZhang WLLiou JSHidaka Kfalse<i>Faecalibacterium taiwanense</i> sp. nov., isolated from human faeces.Two Gram-stain-negative, straight rods, non-motile, asporogenous, catalase-negative and obligately anaerobic butyrate-producing strains, HLW78<sup>T</sup> and CYL33, were isolated from faecal samples of two healthy Taiwanese adults. Phylogenetic analyses of 16S rRNA and DNA mismatch repair protein MutL (<i>mutL</i>) gene sequences revealed that these two novel strains belonged to the genus <i>Faecalibacterium</i>. On the basis of 16S rRNA and <i>mutL</i> gene sequence similarities, the type strains <i>Faecalibacterium butyricigenerans</i> AF52-21<sup>T</sup>(98.3-98.1 % and 79.0-79.5 % similarity), <i>Faecalibacterium duncaniae</i> A2-165<sup>T</sup>(97.8-97.9 % and 70.9-80.1 %), <i>Faecalibacterium hattorii</i> APC922/41-1<sup>T</sup>(97.1-97.3 % and 80.3-80.5 %), <i>Faecalibacterium long2024-01-01T00:00:00Z2024 Jun2026-06-01T13:53:23.596Z2026-04-08T13:15:18.881ZS-EPMC112616673884811710.1099/ijsem.0.006413