Name: Chlamydia avium Sachse et al. 2015

Category: Species

Proposed as: sp. nov.

Etymology: a’vi.um. L. gen. fem. pl. n. avium, of the birds, because birds are the only known hosts of the strains identified to date

Pronunciation, gender: A-wi-um, feminine

Type strain: 10DC88; CSUR P3508; DSM 27005

See detailed strain information at

Conduct genome-based taxonomy at

16S rRNA gene: KF366255 Analyse FASTA

Effective publication: Sachse K, Laroucau K, Riege K, Wehner S, Dilcher M, Creasy HH, Weidmann M, Myers G, Vorimore F, Vicari N, et al. Evidence for the existence of two new members of the family Chlamydiaceae and proposal of Chlamydia avium sp. nov. and Chlamydia gallinacea sp. nov. Syst Appl Microbiol 2014; 37:79-88.

IJSEM list: Oren A, Garrity GM. Validation list no. 164. List of new names and new combinations previously effectively, but not validly, published. Int J Syst Evol Microbiol 2015; 65:2017-2025.

Nomenclatural status: validly published under the ICNP

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

Risk group: 3

• 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 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 15 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 phylogenetic position of this species was determined in a genome-scale analysis by García-López et al. (2019). Publication: 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.

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

Assigned by: Sachse K, Laroucau K, Riege K, Wehner S, Dilcher M, Creasy HH, Weidmann M, Myers G, Vorimore F, Vicari N, et al. Evidence for the existence of two new members of the family Chlamydiaceae and proposal of Chlamydia avium sp. nov. and Chlamydia gallinacea sp. nov. Syst Appl Microbiol 2014; 37:79-88.

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Record number: 792967