Chlamydiaceae


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Chlamydiaceae

 [klah-mid″e-a´se-e]
a family of bacteria containing a single genus, Chlamydia.

Chla·myd·i·a·ce·ae

(kla-mid'ē-ā'sē-ē),
A family of the order Chlamydiales (formerly included in the order Rickettsiales) that includes the agents of the psittacosis-lymphogranuloma-trachoma group. The family contains small, coccoid, gram-negative bacteria that resemble rickettsiae but that differ from them significantly by possessing a unique, obligately intracellular developmental cycle; intracytoplasmic microcolonies give rise to infectious forms by division. The classification of these organisms previously was in a state of flux, but they are now placed in a single genus, Chlamydia, the type genus of the family.

Chlamydiaceae

/Chla·myd·i·a·ceae/ (klah-mid″e-a´se-e) a family of bacteria (order Chlamydiales) consisting of small coccoid microorganisms that have a unique, obligately intracellular developmental cycle and are incapable of synthesizing ATP. They induce their own phagocytosis by host cells, in which they then form intracytoplasmic colonies. They are parasites of birds and mammals (including humans). The family contains a single genus, Chlamydia.

Chla·myd·i·a·ce·ae

(klă-mid'ē-ā'shē-ē)
A family of the order Chlamydiales (formerly included in the order Rickettsiales) that includes the agents of the psittacosis-lymphogranuloma-trachoma group. The family contains small, coccoid, gram-negative bacteria that resemble rickettsiae but differ from them by possessing a unique, obligately intracellular developmental cycle. Intracytoplasmic microcolonies give rise to infectious forms by division.

Chlamydiaceae

a family of obligately intracellular gram-negative bacterial pathogens that parasitize the host cell for ATP. Outside the host cell they exist as elementary bodies, which are 200-300 nm in diameter, have a rigid cell wall and adhere to host cells and are phagocytosed. Inside the host cell phagosome, they form larger reticulate bodies, which replicate, then form elementary bodies, which are released by cell lysis. Cultivable in cell cultures and the yolk sacs of chick embryos. Contains two genera, Chlamydia and Chlamydophila.
References in periodicals archive ?
A positive serologic test result is evidence that the bird was infected by Chlamydiaceae at some point, but it might not indicate that the bird has an active infection.
Emended description of the order Chlamydiales, proposal of Parachlamydiaceae fam nov and Simkaniaceae fam nov, each containing one monotypic genus, revised taxonomy of the family Chlamydiaceae, including a new genus and five new species, and standards for the identification of organisms.
The commercial ArrayTube assay has been successfully used to identify mixed infections among animals infected with multiple species of Chlamydiaceae (18,19).
To examine samples for the presence of any of the 9 Chlamydiaceae species and Waddlia chondrophila and Simkania negevensis, we performed the ArrayTube assay as described (17,19).
D85709) and therefore can be identified as a member of the family Chlamydiaceae (5).
Previous reports of members of the family Chlamydiaceae in amphibians concerned species occurring in other vertebrate taxa as well: C.
Accumulating evidence for recombination among Chlamydiaceae in general, and C.
identified 14 conserved housekeeping genes that could be used to extend MLST schemes for these and potentially other Chlamydiaceae spp.
Antigen retrieval was performed by enzyme digestion for 10 minutes (Pronase; Dako) for the Chlamydiaceae antibody and repeated microwave treatment in citrate buffer (ChemMate; Dako) for the Parachlamydia antibody, respectively.
Our findings raise the possibility that Chlamydiaceae other than Chlamydia trachomatis are involved in PID.
Parachlamydiaceae, which naturally infect amoebae, form a sister taxon to the Chlamydiaceae on the basis of the Chlamydia-like cycle of replication and 80% to 90% homology of ribosomal RNA genes.