The
bacteria
Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among ...
l order Chlamydiales includes only obligately intracellular bacteria that have a chlamydia-like developmental cycle of replication and at least 80% 16S rRNA or 23S rRNA gene sequence identity with other members of Chlamydiales. Chlamydiales live in animals, insects, and protozoa.
Currently, the order Chlamydiales includes the families
Chlamydiaceae
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 call ...
,
Simkaniaceae
Simkaniaceae is a family of bacteria in the order Chlamydiales, class Chlamydiia, phylum Chlamydiota, domain Bacteria. Species in this family have a chlamydia-like cycle of replication and their ribosomal RNA genes are 80–90% identical to rib ...
, and
Waddliaceae
''Waddlia'' is a genus of bacteria in its own family, Waddliaceae. Species in this genus have a ''Chlamydia''-like cycle of replication and their ribosomal RNA genes are 80–90% identical to ribosomal genes in the Chlamydiaceae.
The type spec ...
, which have Gram-negative extracellular infectious bodies (EBs), and
Parachlamydiaceae, which has variable Gram staining of EBs. The family
Rhabdochlamydiaceae
''Candidatus'' Rhabdochlamydia is a genus of intracellular bacteria and the sole genus in the family ''Candidatus'' Rhabdochlamydiaceae. As a ''Candidatus'' taxon, no-one has yet managed to culture them ''in vitro'' for deposition in a culture co ...
has been proposed.
Phylogeny
Taxonomy
The currently accepted taxonomy is based on the
List of Prokaryotic names with Standing in Nomenclature
List of Prokaryotic names with Standing in Nomenclature (LPSN) is an online database that maintains information on the naming and taxonomy of prokaryotes, following the taxonomy requirements and rulings of the International Code of Nomenclature ...
(LPSN)
and
National Center for Biotechnology Information
The National Center for Biotechnology Information (NCBI) is part of the United States National Library of Medicine (NLM), a branch of the National Institutes of Health (NIH). It is approved and funded by the government of the United States. The ...
(NCBI)
* Family "
Actinochlamydiaceae"
Steigen et al. 2013
** ?"''Ca.''
Actinochlamydia"
Steigen et al. 2013
* Family "
Clavichlamydiaceae"
Horn 2011
** "''Ca.''
Clavichlamydia"
corrig. Karlsen et al. 2008
* Family "
Criblamydiaceae"
Thomas, Casson & Greub 2006
** ''
Criblamydia''
Thomas, Casson & Greub 2006
** ''
Estrella''
Thomas et al. 2006
* Family
Chlamydiaceae
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 call ...
Rake 1957
** "''Ca.''
Amphibiichlamydia"
Martel et al. 2012
** ''
Chlamydia
Chlamydia, or more specifically a chlamydia infection, is a sexually transmitted infection caused by the bacterium ''Chlamydia trachomatis''. Most people who are infected have no symptoms. When symptoms do appear they may occur only several wee ...
''
Jones et al. 1945
** "''
Chlamydiifrater''"
Vorimore et al. 2021
** ''
Chlamydophila
''Chlamydophila'' is a controversial bacterial genus belonging to the family Chlamydiaceae.
Taxonomy
All Chlamydiota are anaerobic bacteria with a biphasic developmental lifecycle that depends on obligately intracellular growth in eukaryotic h ...
''
Everett, Bush & Andersen 1999
** ?"''Ca.''
Medusoplasma"
Viver et al. 2017
* Family
Parachlamydiaceae Everett, Bush & Andersen 1999
** ?"''Ca.''
Mesochlamydia"
Corsaro et al. 2012
** ?"''Ca.''
Metachlamydia"
Corsaro et al. 2010
** ''
Neochlamydia''
Horn et al. 2001
** ''
Parachlamydia''
Everett, Bush & Andersen 1999
** "''Ca.''
Protochlamydia"
Collingro et al. 2005
** "''Ca.''
Rubidus"
Pagnier et al. 2015
* Family
Rhabdochlamydiaceae
''Candidatus'' Rhabdochlamydia is a genus of intracellular bacteria and the sole genus in the family ''Candidatus'' Rhabdochlamydiaceae. As a ''Candidatus'' taxon, no-one has yet managed to culture them ''in vitro'' for deposition in a culture co ...
Corsaro et al. 2009
** ?"''Ca.''
Renichlamydia"
Corsaro & Work 2012
** "''Ca.''
Rhabdochlamydia
''Candidatus'' Rhabdochlamydia is a genus of intracellular bacteria and the sole genus in the family ''Candidatus'' Rhabdochlamydiaceae. As a ''Candidatus'' taxon, no-one has yet managed to culture them ''in vitro'' for deposition in a culture co ...
"
Kostanjsek et al. 2004
* Family
Simkaniaceae
Simkaniaceae is a family of bacteria in the order Chlamydiales, class Chlamydiia, phylum Chlamydiota, domain Bacteria. Species in this family have a chlamydia-like cycle of replication and their ribosomal RNA genes are 80–90% identical to rib ...
Everett, Bush & Andersen 1999
** ?"''Ca.''
Fritschea"
Everett et al. 2005
** "''Ca.''
Neptunochlamydia"
Pizzetti et al. 2016
** ''
Simkania''
Everett, Bush & Andersen 1999
** ?"''Ca.''
Syngnamydia"
Fehr et al. 2013
* Family
Waddliaceae
''Waddlia'' is a genus of bacteria in its own family, Waddliaceae. Species in this genus have a ''Chlamydia''-like cycle of replication and their ribosomal RNA genes are 80–90% identical to ribosomal genes in the Chlamydiaceae.
The type spec ...
Rurangirwa et al. 1999
** Genus ''
Waddlia''
Rurangirwa et al. 1999
See also
*
List of bacterial orders
This article lists the orders of the Bacteria. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI)
and the phylogeny is based on 16S ...
*
List of bacteria genera This article lists the genera of the bacteria. The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and National Center for Biotechnology Information (NCBI). However many taxonomic names are ...
References
Chlamydiota
Bacteria orders
{{Bacteria-stub