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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.
| Chlamydiaceae | |
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| Chlamydia trachomatis inclusion bodies (brown) in a McCoy cell culture | |
Scientific classification 
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| Domain: | Bacteria |
| Phylum: | Chlamydiota |
| Class: | Chlamydiia |
| Order: | Chlamydiales |
| Family: | Chlamydiaceae Rake 1957 |
| Genera | |
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The family Chlamydiaceae currently includes one genus and one candidate genus: Chlamydia and candidatus Clavochlamydia.[1]
Chlamydia
editThree 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
editThe currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN)[2] and National Center for Biotechnology Information (NCBI)[1]
| 16S rRNA based LTP_08_2023[3][4][5] | 120 marker proteins based GTDB 08-RS214[6][7][8] | |||||||||||||||||||||
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See also
editReferences
edit- ^ a b Sayers; et al. "Chlamydiae". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2022-09-09.
- ^ J.P. Euzéby. "Chlamydiota". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2022-09-09.
- ^ "The LTP". Retrieved 20 November 2023.
- ^ "LTP_all tree in newick format". Retrieved 20 November 2023.
- ^ "LTP_08_2023 Release Notes" (PDF). Retrieved 20 November 2023.
- ^ "GTDB release 08-RS214". Genome Taxonomy Database. Retrieved 10 May 2023.
- ^ "bac120_r214.sp_label". Genome Taxonomy Database. Retrieved 10 May 2023.
- ^ "Taxon History". Genome Taxonomy Database. Retrieved 10 May 2023.