Name: Ehrlichia sennetsu (Misao and Kobayashi 1956) Ristic and Huxsoll 1984

Category: Species

Proposed as: comb. nov.

Basonym: Rickettsia sennetsu Misao and Kobayashi 1956 (Approved Lists 1980)

Etymology: sen.net’su. N.L. neut. n. sennetsu, from Japanese, meaning glandular fever (nominative in apposition)

Pronunciation, gender: sen-NET-su, feminine

Type strain: ATCC VR-367; Miyayama

Conduct genome-based taxonomy at

16S rRNA gene: M73219 Analyse FASTA

Effective publication: Ristic M, Huxsoll DL. Genus Ehrlichia. In: Krieg NR, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 1., The Williams & Wilkins Co., Baltimore, 1984, p. 704-709.

IJSEM list: Anonymous. Validation list no. 15. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1984; 34:355-357.

Nomenclatural status: validly published under the ICNP

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

Risk group: 3

• Synonyms:

  • Name	Kind
    Rickettsia sennetsu Misao and Kobayashi 1956 (Approved Lists 1980)	homotypic synonym, validly published under the ICNP
    "Neorickettsia sennetsu" (Misao and Kobayashi 1956) Dumler et al. 2001	homotypic synonym, not validly published

• Notes:
  • 😷 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 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 France has been imported on 2024-08-30. The full classification is: risk group = 2. — The risk group for Sweden has been imported on 2024-02-05. The full classification is: risk group = 2. — The risk group for United Kingdom has been imported on 2024-01-31. 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 28 times in PubMed until 2025-06-04.
  • 🙆 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 new combination Ehrlichia sennetsu (Misao and Kobayashi 1956) Ristic and Huxsoll 1984 [basonym: Rickettsia sennetsu Misao and Kobayashi 1956 (Approved Lists 1980)] was proposed by Ristic and Huxsoll in 1984 then validly published by announcement in Validation List no. 15. In the effective publication and in Validation List no. 15, no type strain was designated. However, strain ATCC VR-367 is the type strain of the basonym Rickettsia sennetsu and this strain is available at the ATCC. So, the type strain of Ehrlichia sennetsu should be the strain ATCC VR-367. Publication: Euzeby JP, Kudo T. Corrigenda to the validation lists. Int J Syst Evol Microbiol 2001; 51:1933-1938.

Parent taxon: Ehrlichia Moshkovski 1945 (Approved Lists 1980)

Assigned by: Ristic M, Huxsoll DL. Genus Ehrlichia. In: Krieg NR, Holt JG (eds), Bergey's manual of systematic bacteriology, vol. 1., The Williams & Wilkins Co., Baltimore, 1984, p. 704-709.

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Record number: 783764