Species Bacteroides forsythus

Name: Bacteroides forsythus Tanner et al. 1986

Category: Species

Proposed as: sp. nov.

Etymology: for.sy’thus. N.L. masc. adj. forsythus, pertaining to the Forsyth Dental Center, where the species was first isolated

Pronunciation (Latin), gender: bak-ter-o-I-des for-SY-t^hus, masculine

Type strain: 338; ATCC 43037; CCUG 21028; CCUG 21028 A; CCUG 33064; CCUG 33226; CIP 105219; DSM 18712; FDC 338; JCM 10827

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: AB547708 Analyse FASTA

Valid publication: Tanner ACR, Listgarten MA, Ebersole JL, Strzempko MN. Bacteroides forsythus sp. nov., a slow-growing, fusiform Bacteroides sp. from the human oral cavity. Int. J. Syst. Bacteriol. 1986; 36:213-221.

Nomenclatural status: validly published under the ICNP

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

Correct name: Tannerella forsythia corrig. (Tanner et al. 1986) Sakamoto et al. 2002

Risk group: 2

Synonyms:

Name	Kind
Tannerella forsythia corrig. (Tanner et al. 1986) Sakamoto et al. 2002	homotypic synonym, validly published under the ICNP
Tannerella forsythensis (Tanner et al. 1986) Sakamoto et al. 2002	homotypic synonym, inaccurate spelling

Notes:
- ❗ Bacteroides forsythus is the correct name instead if this species is regarded as a separate species (i.e., if its nomenclatural type is not assigned to another species whose name is validly published, legitimate and not rejected and has priority) within a separate genus Bacteroides.
- 😷 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: 1 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No - Containment level: Containment Level 2". — 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 2023-10-29. 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 361 times in PubMed until 2026-06-11.
- 🙅 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.
- 🧍 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. 🇬🇧

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

Assigned by: Tanner ACR, Listgarten MA, Ebersole JL, Strzempko MN. Bacteroides forsythus sp. nov., a slow-growing, fusiform Bacteroides sp. from the human oral cavity. Int. J. Syst. Bacteriol. 1986; 36:213-221.

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.783444Link copied to clipboard

Record number: 783444

This LPSN page was printed on 2026-08-13 05:53:28

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Species Bacteroides forsythus