Abstract

A strain of the recently validated species Faecalibacterium hominis shares 99.0 % 16S rRNA gene sequence similarity with the type strain of Faecalibacterium duncaniae. The aim of this study was to evaluate the taxonomic relationship between F. hominis and F. duncaniae. F. duncaniae JCM 31915T showed 73.0 % digital DNA-DNA hybridization (dDDH) value with F. hominis JCM 39347T. The average nucleotide identity (ANI) value between these two strains was 96.7 %. These results indicate that F. duncaniae JCM 31915T and F. hominis JCM 39347T represent members of the same species. Based on these data, we propose Faecalibacterium hominis as a later heterotypic synonym of Faecalibacterium duncaniae. An emended description is provided.

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