Name: Chlamydia pecorum Fukushi and Hirai 1992

Category: Species

Proposed as: sp. nov.

Etymology: pe.co’rum. L. gen. neut. pl. n. pecorum, flocks of sheep or herds of cattle

Gender: feminine

Type strain: ATCC VR-628; DSM 29919; E58

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: D88317 Analyse FASTA

Valid publication: Fukushi H, Hirai K. Proposal of Chlamydia pecorum sp. nov. for Chlamydia strains derived from ruminants. Int J Syst Bacteriol 1992; 42:306-308.

IJSEM list: Anonymous. Validation list no. 42. Validation of publication of new names and new combinations previously effectively published outside the IJSB. Int J Syst Bacteriol 1992; 42:511.

Nomenclatural status: validly published under the ICNP

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

Risk group: 2

• Synonyms:

  • Name	Kind
    Chlamydophila pecorum (Fukushi and Hirai 1992) Everett et al. 1999	homotypic synonym, validly published under the ICNP

• Emendations:
  • García-López et al. 2019 Garcia-Lopez M, Meier-Kolthoff JP, Tindall BJ, Gronow S, Woyke T, Kyrpides NC, Hahnke RL, Goker M. Analysis of 1,000 Type-Strain Genomes Improves Taxonomic Classification of Bacteroidetes. Front Microbiol 2019; 10:2083. 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 phylogenomic assignment score of this taxon is 0.06068 (N = 1).
  • 😷 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 = 2, note = "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 = 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 194 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.
  • 🧍 In the paper by Fukushi and Hirai 1992, the type strain is erroneously cited as ATCC VR 628 (without dash). — Tang J. Personal communication, 2001-05-30.

Parent taxon: Chlamydia Jones et al. 1945 (Approved Lists 1980)

Assigned by: Fukushi H, Hirai K. Proposal of Chlamydia pecorum sp. nov. for Chlamydia strains derived from ruminants. Int J Syst Bacteriol 1992; 42:306-308.

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Record number: 783625