Organisms

Chlamydiales

An order of obligately intracellular, gram-negative bacteria that have the chlamydia-like developmental cycle of replication. This is a two-stage cycle that includes a metabolically inactive infectious form, and a vegetative form that replicates by binary fission. Members of Chlamydiales are disseminated by aerosol or by contact. There are at least six recognized families: CHLAMYDIACEAE, Criblamydiaceae, Parachlamydiaceae, Rhabdochlamydia, Simkaniaceae, and Waddliaceae.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

An order of obligately intracellular, gram-negative bacteria that have the chlamydia-like developmental cycle of replication. This is a two-stage cycle that includes a metabolically inactive infectious form, and a vegetative form that replicates by binary fission. Members of Chlamydiales are disseminated by aerosol or by contact. There are at least six recognized families: CHLAMYDIACEAE, Criblamydiaceae, Parachlamydiaceae, Rhabdochlamydia, Simkaniaceae, and Waddliaceae.

MeSH Record

Classification

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MeSH Record

Synonyms

6 entry terms
  • Criblamydiaceae
  • Microorganism Z
  • Parachlamydiaceae
  • Rhabdochlamydia
  • Simkaniaceae
  • Waddliaceae

MeSH Record

Aspects Covered

15 allowable subheadings

Indexed with the subheadings chemistry, classification, cytology, drug effects, enzymology, genetics, growth & development, immunology, isolation & purification, metabolism, pathogenicity, physiology, radiation effects, ultrastructure, virology.

MeSH Record

History Note

1976

MeSH Record

Previous Indexing

  • Bacteria (1966-1974)
  • Micotatobiotes (1975)

MeSH Hierarchy

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MeSH Record

NLM Classification

QW 152

AMA Style

References

  1. National Library of Medicine. Chlamydiales. Medical Subject Headings (MeSH). 2026. Unique ID D002695. http://id.nlm.nih.gov/mesh/2026/D002695
  2. Chlamydiales. In: Wikipedia. https://en.wikipedia.org/wiki/Chlamydiales
  3. Chlamydiales. In: Wikidata. https://www.wikidata.org/wiki/Q5102716