Name: Adlercreutzia equolifaciens Maruo et al. 2008

Category: Species

Proposed as: sp. nov.

Etymology: e.quo.li.fa’ci.ens. N.L. neut. n. equol -olis, equol; L. pres. part. faciens, making; N.L. fem. part. adj. equolifaciens, equol-producing

Pronunciation (Latin), gender: … e-kwo-li-FA-ki-ens, feminine

Type strain: CCUG 54925; DSM 19450; FJC-B9; JCM 14793

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB306661 Analyse FASTA

Valid publication: Maruo T, Sakamoto M, Ito C, Toda T, Benno Y. Adlercreutzia equolifaciens gen. nov., sp. nov., an equol-producing bacterium isolated from human faeces, and emended description of the genus Eggerthella. Int J Syst Evol Microbiol 2008; 58:1221-1227. 🇯🇵

IJSEM list: Euzeby JP. Notification list. Notification that new names and new combinations have appeared in volume 58, part 5 of the IJSEM. Int J Syst Evol Microbiol 2008; 58:1783-1784.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name (and explicitly recommended for medical use)

Risk group: 1

• Notes:
  • 🥇 Nomenclatural type of the genus Adlercreutzia Maruo et al. 2008. Publication: Maruo T, Sakamoto M, Ito C, Toda T, Benno Y. Adlercreutzia equolifaciens gen. nov., sp. nov., an equol-producing bacterium isolated from human faeces, and emended description of the genus Eggerthella. Int J Syst Evol Microbiol 2008; 58:1221-1227. 🇯🇵
  • 😩 Deposits incorrectly indicated in some sources as representing the type strain of this taxon: JCM 34176; LMG 31897.
  • 😷 The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 1". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 1. — If in doubt, use the risk group given in the regulations for your country and, if these are not available, use the risk group given in the catalogue of the culture collection from which you have obtained or intend to obtain the strain.
  • 🎓 Name mentioned 48 times in PubMed until 2025-06-04.
  • 🙆 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as the name to be applied to this species. The name is on LoRN because of the recorded pathogenicity of other species in the genus.
  • 🧍 According to Bartlett et al. (2022), this species was isolated from feces in healthy individuals. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology (Reading) 2022; 168:0. 🇬🇧
  • 🧍 The phylogenetic position of this species was determined in a genome-scale analysis by Nouioui et al. (2018). Publication: Nouioui I, Carro L, Garcia-Lopez M, Meier-Kolthoff JP, Woyke T, Kyrpides NC, Pukall R, Klenk HP, Goodfellow M, Goker M. Genome-Based Taxonomic Classification of the Phylum Actinobacteria. Front Microbiol 2018; 9:2007. 🇩🇪

Subdivision:

Number of child taxa with a validly published and correct name: 2
Number of child taxa with a validly published name, including synonyms: 2
Total number of child taxa: 3

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    Adlercreutzia equolifaciens subsp. celata corrig. (Minamida et al. 2008) Nouioui et al. 2018	validly published under the ICNP	correct name
    Adlercreutzia equolifaciens subsp. celatus (Minamida et al. 2008) Nouioui et al. 2018	inaccurate spelling	misspelling
    Adlercreutzia equolifaciens subsp. equolifaciens (Maruo et al. 2008) Nouioui et al. 2018	validly published under the ICNP	correct name

Parent taxon: Adlercreutzia Maruo et al. 2008

Assigned by: Maruo T, Sakamoto M, Ito C, Toda T, Benno Y. Adlercreutzia equolifaciens gen. nov., sp. nov., an equol-producing bacterium isolated from human faeces, and emended description of the genus Eggerthella. Int J Syst Evol Microbiol 2008; 58:1221-1227. 🇯🇵

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Record number: 786546