Name: Eggerthella lenta (Eggerth 1935) Kageyama et al. 1999

Category: Species

Proposed as: comb. nov.

Basonym: "Bacteroides lentus" Eggerth 1935

Etymology: len’ta. L. fem. adj. lenta, slow

Pronunciation (Latin), gender: … LEN-ta, feminine

Type strain: ATCC 25559; CCUG 17323; CCUG 17323 A; CIP 106637; DSM 2243; JCM 9979; NCAIM B.01418; NCTC 11813

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AF292375 Analyse FASTA

Valid publication: Kageyama A, Benno Y, Nakase T. Phylogenetic evidence for the transfer of Eubacterium lentum to the genus Eggerthella as Eggerthella lenta gen. nov., comb. nov. Int J Syst Bacteriol 1999; 49:1725-1732. 🇯🇵

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 49, part 4 of the IJSB. Int J Syst Bacteriol 2000; 50:5-7.

Nomenclatural status: validly published under the ICNP, illegitimate name

Taxonomic status: synonym (and not recommended for medical use)

Correct name: Eggerthella lenta (Eggerth 1935) Wade et al. 1999

Risk group: 2

• Synonyms:

  • Name	Kind
    "Bacteroides lentus" Eggerth 1935	homotypic synonym, not validly published, basonym of name in Approved Lists
    Eggerthella lenta (Eggerth 1935) Wade et al. 1999	homotypic synonym, validly published under the ICNP
    Eubacterium lentum (Eggerth 1935) Prévot 1938 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Eggerthella Kageyama et al. 1999. Publication: Kageyama A, Benno Y, Nakase T. Phylogenetic evidence for the transfer of Eubacterium lentum to the genus Eggerthella as Eggerthella lenta gen. nov., comb. nov. Int J Syst Bacteriol 1999; 49:1725-1732. 🇯🇵
  • 📧 The e-mail address of the corresponding author given in the effective publication is not functional any more.
  • 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 2, note = "human pathogen". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 2, note = "Animal classification RG: 2 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "ht". — 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 173 times in PubMed until 2025-06-04.
  • 🙅 This name is on the List of Recommended Names for bacteria of medical importance (LoRN) as a synonym of the name to be applied to this species. The name is on LoRN because of the recorded risk group of the species itself.

Parent taxon: Eggerthella Kageyama et al. 1999

Assigned by: Kageyama A, Benno Y, Nakase T. Phylogenetic evidence for the transfer of Eubacterium lentum to the genus Eggerthella as Eggerthella lenta gen. nov., comb. nov. Int J Syst Bacteriol 1999; 49:1725-1732. 🇯🇵

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Record number: 7150