Species ***Bacteroides* *ovatus***

Name: Bacteroides ovatus Eggerth and Gagnon 1933 (Approved Lists 1980)

Category: Species

Proposed as: sp. nov.

Etymology: o.va’tus. L. masc. adj. ovatus, ovate, egg-shaped (relating to the cellular shape)

Pronunciation (Latin), gender: bak-ter-o-I-des o-WA-tus, masculine

Type strain: ATCC 8483; BCRC 10623; CCRC 10623; CCUG 4943; CIP 103756; DSM 1896; JCM 5824; NCTC 11153

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB510705 Analyse FASTA

Effective publication: Eggerth AH, Gagnon BH. The Bacteroides of Human Feces. J Bacteriol 1933; 25:389-413.

IJSEM list: Skerman VBD, McGowan V, Sneath PHA. Approved lists of bacterial names. Int J Syst Bacteriol 1980; 30:225-420.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

Synonyms:

Name	Kind
Bacteroides kribbi Shin et al. 2017	heterotypic synonym, validly published under the ICNP
Bacteroides koreensis Shin et al. 2017	heterotypic synonym, validly published under the ICNP

Emendations:
- Hahnke et al. 2016 Hahnke RL, Meier-Kolthoff JP, Garcia-Lopez M, Mukherjee S, Huntemann M, Ivanova NN, Woyke T, Kyrpides NC, Klenk HP, Goker M. Genome-Based Taxonomic Classification of Bacteroidetes. Front Microbiol 2016; 7:2003. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 26. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2017; 67:2081-2086.
- Zaatout et al. 2025 Zaatout N, Menasria T, Benhadj M. Comprehensive Phylogenomic Analyses Support the Reclassification of Multiple Bacteroides Species. Curr Microbiol 2025; 83:96. 🇩🇿
  Notes:
  - 🧍 As of 2026-02-11 this emendation was not yet included in an IJSEM List of Changes in Taxonomic Opinion.

Notes:
- ⏰ According to Yang et al. (2025), this species is an earlier heterotypic synonym of Bacteroides koreensis Shin et al. 2017. Publication: Yang AI, Kim B, Kang W, Joe HI, Shin NR. Bacteroides celer sp. nov. and Bacteroides mucinivorans sp. nov., isolated from human feces, and the reclassification of Bacteroides koreensis Shin et al. 2017 and Bacteroides kribbi Shin et al. 2017 as later heterotypic synonyms of Bacteroides ovatus Eggerth and Gagnon 1933 (Approved Lists 1980). J Microbiol 2025; 63:e2502006. 🇰🇷
- ⏰ According to Yang et al. (2025), this species is an earlier heterotypic synonym of Bacteroides kribbi Shin et al. 2017. Publication: Yang AI, Kim B, Kang W, Joe HI, Shin NR. Bacteroides celer sp. nov. and Bacteroides mucinivorans sp. nov., isolated from human feces, and the reclassification of Bacteroides koreensis Shin et al. 2017 and Bacteroides kribbi Shin et al. 2017 as later heterotypic synonyms of Bacteroides ovatus Eggerth and Gagnon 1933 (Approved Lists 1980). J Microbiol 2025; 63:e2502006. 🇰🇷
- 🏢 Synonymy of this taxon was mentioned in an IJSEM list. Publication: Oren A, Göker M. List of changes in taxonomic opinion no. 43. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2026; 76:6976.
- 😷 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 = 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 Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 2. — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 2. — The risk group for Taiwan has been imported on 2024-11-03. The full classification is: risk group = 2, note = "P650 = v". — 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 399 times in PubMed until 2026-06-11.
- 🙆 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 risk group of the species itself.
- 🧍 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 (Reading) 2022; 168:0. 🇬🇧
- 🧍 The genome of the type strain was sequenced as part of the GEBA (Genomic Encyclopedia of Bacteria and Archaea) project. Publication: Garcia-Lopez M, Meier-Kolthoff JP, Tindall BJ, Gronow S, Woyke T, Kyrpides NC, Hahnke RL, Goker M. Analysis of 1,000 Type-Strain Genomes Improves Taxonomic Classification of Bacteroidetes. Front Microbiol 2019; 10:2083. 🇩🇪

Parent taxon: Bacteroides Castellani and Chalmers 1919 (Approved Lists 1980)

Assigned by: Eggerth AH, Gagnon BH. The Bacteroides of Human Feces. J Bacteriol 1933; 25:389-413.

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.773966Link copied to clipboard

Record number: 773966

This LPSN page was printed on 2026-09-07 23:53:58

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Species Bacteroides ovatus

Species ***Bacteroides* *ovatus***