Species ***Rickettsia* *typhi***

Name: Rickettsia typhi (Wolbach and Todd 1920) Philip 1943 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Dermacentroxenus typhi" Wolbach and Todd 1920

Etymology: ty’phi. Gr. masc. n. tŷphos, name of four kinds of fever, one of which is accompanied by stuport; L. gen. masc. n. typhi, of typhus

Pronunciation (Latin), gender: rik-KETT-si-a TY-p^hi, feminine

Type strain: ATCC VR-144; Wilmington

Conduct genome-based taxonomy at

16S rRNA gene: U12463 Analyse FASTA

Effective publication: Philip CB. Nomenclature of the pathogenic rickettsiae. American Journal of Hygiene 1943; 37:301-309.

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: 3

Synonyms:

Name	Kind
"Dermacentroxenus typhi" Wolbach and Todd 1920	homotypic synonym, not validly published, basonym of name in Approved Lists

Emendations:
- Hördt et al. 2020 Hordt A, Lopez MG, Meier-Kolthoff JP, Schleuning M, Weinhold LM, Tindall BJ, Gronow S, Kyrpides NC, Woyke T, Goker M. Analysis of 1,000+ Type-Strain Genomes Substantially Improves Taxonomic Classification of Alphaproteobacteria. Front Microbiol 2020; 11:468. 🇩🇪 Oren A, Garrity GM. List of changes in taxonomic opinion no. 32. Notification of changes in taxonomic opinion previously published outside the IJSEM. Int J Syst Evol Microbiol 2020; 70:4061-4090.

Notes:
- 😷 The risk group for Belgium has been imported on 2024-02-05. The full classification is: risk group = 3, note = "human and animal pathogen - biological class of risk animal: 3". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 3, note = "Animal classification RG: 3 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: No". — The risk group for Swiss Confederation has been imported on 2024-02-01. The full classification is: risk group = 3. — The risk group for Germany has been imported on 2026-08-13. The full classification is: risk group = 3, note = "Z". — The risk group for France has been imported on 2024-08-30. The full classification is: risk group = 3. — The risk group for Sweden has been imported on 2024-02-05. The full classification is: risk group = 3. — The risk group for Taiwan has been imported on 2024-11-03. The full classification is: risk group = 3, note = "P650 = v". — The risk group for United Kingdom has been imported on 2024-01-31. The full classification is: risk group = 3. — The risk group for United States has been imported on 2024-02-09. The full classification is: risk group = 3. — 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 629 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. 🇬🇧
- 🧍 In the Approved Lists of Bacterial Names, the type strain is erroneously cited as ATCC VR 144 (without dash). — Tang J. Personal communication, 2001-05-30. — 🧍 The type strain ATCC VR-144 is temporarily unavailable. — Tang J. Personal communication, 2001-11-05.

Parent taxon: Rickettsia da Rocha-Lima 1916 (Approved Lists 1980)

Assigned by: Philip CB. Nomenclature of the pathogenic rickettsiae. American Journal of Hygiene 1943; 37:301-309.

Linking: To permanently link to this page, use https://doi.org/10.83108/rn.784806Link copied to clipboard

Record number: 784806

This LPSN page was printed on 2026-08-18 15:08:59

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Species Rickettsia typhi

Species ***Rickettsia* *typhi***