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Chlamydiaceae
Chlamydia trachomatis inclusion bodies (brown) in a McCoy cell culture
Scientific classification
Domain:	Bacteria
Phylum:	Chlamydiota
Class:	Chlamydiia
Order:	Chlamydiales
Family:	Chlamydiaceae Rake 1957
Genera
"Ca. Amphibiichlamydia" Chlamydia "Chlamydiifrater" Chlamydophila "Ca. Clavichlamydia" "Ca. Medusoplasma"

The Chlamydiaceae are a family of gram-negative bacteria that belongs to the phylum Chlamydiota, order Chlamydiales. Chlamydiaceae species express the family-specific lipopolysaccharide epitope αKdo-(2→8)-αKdo-(2→4)-αKdo (previously called the genus-specific epitope). Chlamydiaceae ribosomal RNA genes all have at least 90% DNA sequence identity. Chlamydiaceae species have varying inclusion morphology, varying extrachromosomal plasmid content, and varying sulfadiazine resistance.

The family Chlamydiaceae currently includes one genus and one candidate genus: Chlamydia and candidatus Clavochlamydia.

Chlamydia

Three species belong to Chlamydia: C. trachomatis, C. muridarum, and C. suis. C. trachomatis has been found only in humans, C. muridarum in hamsters and mice (family Muridae), and C. suis in swine. Chlamydia species produce a small amount of detectable glycogen and have two ribosomal operons.

Chlamydia trachomatis is the cause of an infection commonly transmitted sexually (often referred as just "Chlamydia") and also is the cause of trachoma, an infectious eye disease, spread by eye, nose, and throat secretions.

Phylogeny

The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI)

See also

• List of bacterial orders
• List of bacteria genera

References

1. ^ Sayers; et al. "Chlamydiae". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2022-09-09.
2. J.P. Euzéby. "Chlamydiota". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2022-09-09.
3. "The LTP". Retrieved 20 November 2023.
4. "LTP_all tree in newick format". Retrieved 20 November 2023.
5. "LTP_08_2023 Release Notes" (PDF). Retrieved 20 November 2023.
6. "GTDB release 08-RS214". Genome Taxonomy Database. Retrieved 10 May 2023.
7. "bac120_r214.sp_label". Genome Taxonomy Database. Retrieved 10 May 2023.
8. "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2023.

• Chlamydiota
• Bacteria families