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

Category: Species

Proposed as: comb. nov.

Basonym: "Bacteroides lentus" Eggerth 1935

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

Gender: 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: Wade WG, Downes J, Dymock D, Hiom SJ, Weightman AJ, Dewhirst FE, Paster BJ, Tzellas N, Coleman B. The family Coriobacteriaceae: reclassification of Eubacterium exiguum (Poco et al. 1996) and Peptostreptococcus heliotrinreducens (Lanigan 1976) as Slackia exigua gen. nov., comb. nov. and Slackia heliotrinireducens gen. nov., comb. nov., and Eubacterium lentum (Prevot 1938) as Eggerthella lenta gen. nov., comb. nov. Int J Syst Bacteriol 1999; 49:595-600.

IJSEM list: Anonymous. Notification list. Notification that new names and new combinations have appeared in volume 49, part 2 of the IJSB. Int J Syst Bacteriol 1999; 49:937-939.

Nomenclatural status: validly published under the ICNP

Taxonomic status: correct name

Risk group: 2

• Synonyms:

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

• Emendations:
  • Maruo et al. 2008 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. 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.
    Notes:
    • 🧍 In the paper by Maruo et al. 2008, Eggerthella lenta is erroneously cited as Eggerthella lenta Wade et al. 1999.
  • Nouioui et al. 2018 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. Oren A, Garrity GM. List of changes in taxonomic opinion no. 29. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2019; 69:13-32.

• Notes:
  • 🥇 Nomenclatural type of the genus Eggerthella Wade et al. 1999. Publication: Wade WG, Downes J, Dymock D, Hiom SJ, Weightman AJ, Dewhirst FE, Paster BJ, Tzellas N, Coleman B. The family Coriobacteriaceae: reclassification of Eubacterium exiguum (Poco et al. 1996) and Peptostreptococcus heliotrinreducens (Lanigan 1976) as Slackia exigua gen. nov., comb. nov. and Slackia heliotrinireducens gen. nov., comb. nov., and Eubacterium lentum (Prevot 1938) as Eggerthella lenta gen. nov., comb. nov. Int J Syst Bacteriol 1999; 49:595-600.
  • 😷 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 148 times in PubMed until 2024-03-27.
  • 🧍 According to Bartlett et al. (2022), this species is an established human pathogen. Publication: Bartlett A, Padfield D, Lear L, Bendall R, Vos M. A comprehensive list of bacterial pathogens infecting humans. Microbiology 2022; 168:0.
  • 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. Publication: Mukherjee S, Seshadri R, Varghese NJ, Eloe-Fadrosh EA, Meier-Kolthoff JP, Goker M, Coates RC, Hadjithomas M, Pavlopoulos GA, Paez-Espino D, et al. 1,003 reference genomes of bacterial and archaeal isolates expand coverage of the tree of life. Nat Biotechnol 2017; 35:676-683.

Parent taxon: Eggerthella Wade et al. 1999

Assigned by: Wade WG, Downes J, Dymock D, Hiom SJ, Weightman AJ, Dewhirst FE, Paster BJ, Tzellas N, Coleman B. The family Coriobacteriaceae: reclassification of Eubacterium exiguum (Poco et al. 1996) and Peptostreptococcus heliotrinreducens (Lanigan 1976) as Slackia exigua gen. nov., comb. nov. and Slackia heliotrinireducens gen. nov., comb. nov., and Eubacterium lentum (Prevot 1938) as Eggerthella lenta gen. nov., comb. nov. Int J Syst Bacteriol 1999; 49:595-600.

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Record number: 775884