Name: Cowdria ruminantium (Cowdry 1925) Moshkovski 1947 (Approved Lists 1980)

Category: Species

Proposed as: comb. nov.

Basonym: "Rickettsia ruminantium" Cowdry 1925

Etymology: ru.mi.nan’ti.um. L. pres. part. ruminans, ruminating; N.L. gen. pl. n. ruminantium, of ruminants [probably better: ruminantiorum]

Gender: feminine

Type strain: no culture isolated; Welgevonden

Conduct genome-based taxonomy at

16S rRNA gene: X61659 Analyse FASTA

Effective publication: Moshkovski SD. Comments by readers. Science (Washington) 1947; 106:62.

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: synonym (and not recommended for medical use)

Correct name: Ehrlichia ruminantium (Cowdry 1925) Dumler et al. 2001

Risk group: 2

• Synonyms:

  • Name	Kind
    "Rickettsia ruminantium" Cowdry 1925	homotypic synonym, not validly published, basonym of name in Approved Lists
    Ehrlichia ruminantium (Cowdry 1925) Dumler et al. 2001	homotypic synonym, validly published under the ICNP

• Notes:
  • 🥇 Nomenclatural type of the genus Cowdria Moshkovski 1947 (Approved Lists 1980). Publication: Moshkovski SD. Comments by readers. Science (Washington) 1947; 106:62.
  • ❗ Cowdria ruminantium 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 Cowdria.
  • 😷 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: 3". — The risk group for Canada has been imported on 2024-02-27. The full classification is: risk group = 1, note = "Animal classification RG: 3 - Security sensitive biological agent: No - Terrestrial animal pathogen under Canadian Food Inspection Agency authority: Yes". — 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 = "Z". — 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 351 times in PubMed until 2025-06-04.
  • 🙅 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.
  • 🧍 Several strains have been isolated since the Approved Lists 1980. According to Rule 18f, Dumler et al. 2001 designated the strain Welgevonden as the type strain of the new combination Ehrlichia ruminantium (see, below). Publication: Dumler JS, Barbet AF, Bekker CP, Dasch GA, Palmer GH, Ray SC, Rikihisa Y, Rurangirwa FR. Reorganization of genera in the families Rickettsiaceae and Anaplasmataceae in the order Rickettsiales: unification of some species of Ehrlichia with Anaplasma, Cowdria with Ehrlichia and Ehrlichia with Neorickettsia, descriptions of six new species combinations and designation of Ehrlichia equi and 'HGE agent' as subjective synonyms of Ehrlichia phagocytophila. Int J Syst Evol Microbiol 2001; 51:2145-2165.

Parent taxon: Cowdria Moshkovski 1947 (Approved Lists 1980)

Assigned by: Moshkovski SD. Comments by readers. Science (Washington) 1947; 106:62.

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Record number: 783705