Name: Ehrlichia risticii Holland et al. 1985

Category: Species

Proposed as: sp. nov.

Etymology: ris.ti’ci.i. N.L. gen. masc. n. risticii, of Ristic, named after from Miodrag Ristic

Pronunciation, gender: ris-TI-ki-i, feminine

Type strain: ATCC VR-986; HRC-IL; Illinois

Conduct genome-based taxonomy at

16S rRNA gene: M21290 Analyse FASTA

Valid publication: Holland CJ, Weiss E, Burgdorfer W, Cole AI, Kakoma I. Ehrlichia risticii sp. nov.: etiological agent of equine monocytic ehrlichiosis (synonym, Potomac horse fever). Int. J. Syst. Bacteriol. 1985; 35:524-526.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    "Neorickettsia risticii" (Holland et al. 1985) 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 = 1, note = "animal pathogen - biological class of risk animal: 2". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, 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, note = "PV". — The risk group for Germany has been imported on 2023-10-29. The full classification is: risk group = 2, note = "t". — 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 132 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.
  • 🧍 The type strain ATCC VR-986 is deaccessioned. — Tang J. Personal communication, 2001-11-06.

Subdivision:

Number of child taxa with a validly published and correct name: 0
Number of child taxa with a validly published name, including synonyms: 0
Total number of child taxa: 1

• Child taxa:

  • Name	Nomenclatural status	Taxonomic status
    "Ehrlichia risticii subsp. atypicalis" Kakoma et al. 1994	not validly published	preferred name

Parent taxon: Ehrlichia Moshkovski 1945 (Approved Lists 1980)

Assigned by: Holland CJ, Weiss E, Burgdorfer W, Cole AI, Kakoma I. Ehrlichia risticii sp. nov.: etiological agent of equine monocytic ehrlichiosis (synonym, Potomac horse fever). Int. J. Syst. Bacteriol. 1985; 35:524-526.

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Record number: 783762