Faecalibacterium hominis Liu et al. 2023 is a later heterotypic synonym of Faecalibacterium duncaniae Sakamoto et al. 2022

Mitsuo Sakamoto; Naomi Sakurai; Hiroki Tanno; Takao Iino; Moriya Ohkuma; Akihito Endo

doi:10.1099/ijsem.0.005995

Faecalibacterium hominis Liu et al. 2023 is a later heterotypic synonym of Faecalibacterium duncaniae Sakamoto et al. 2022

Int J Syst Evol Microbiol. 2023 Aug;73(8). doi: 10.1099/ijsem.0.005995.

Authors

Mitsuo Sakamoto¹, Naomi Sakurai¹, Hiroki Tanno², Takao Iino¹, Moriya Ohkuma¹, Akihito Endo^{2

3}

Affiliations

¹ Microbe Division/Japan Collection of Microorganisms, RIKEN BioResource Research Center, Tsukuba, Ibaraki, 305-0074, Japan.
² Department of Food, Aroma and Cosmetic Chemistry, Faculty of Bioindustry, Tokyo University of Agriculture, Hokkaido 099-2493, Japan.
³ Department of Nutritional Science and Food Safety, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan.

PMID: 37566461
DOI: 10.1099/ijsem.0.005995

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 31915^T showed 73.0 % digital DNA-DNA hybridization (dDDH) value with F. hominis JCM 39347^T. The average nucleotide identity (ANI) value between these two strains was 96.7 %. These results indicate that F. duncaniae JCM 31915^T and F. hominis JCM 39347^T 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.

Keywords: Faecalibacterium duncaniae; Faecalibacterium hominis; genome-based taxonomy; synonym.

MeSH terms

Bacterial Typing Techniques
Base Composition
DNA, Bacterial / genetics
Fatty Acids* / chemistry
Nucleic Acid Hybridization
Phylogeny
RNA, Ribosomal, 16S / genetics
Sequence Analysis, DNA

Substances

Fatty Acids
RNA, Ribosomal, 16S
DNA, Bacterial