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PetriKey

Bacterium

Chlamydia trachomatis

Obligate intracellular bacterium

kluh-MID-ee-uh truh-KOH-muh-tis

bacteriaintracellularelementary-bodyreticulate-bodysti

High-yield clue

Obligate intracellular + elementary body/reticulate body vocabulary.

Overview

An obligate intracellular bacterium used to teach elementary/reticulate body vocabulary and NAAT testing terminology.

Classification

  • Obligate intracellular bacterium
  • Atypical cell-wall concept

Lab & identification clues

  • NAAT vocabulary
  • Intracellular inclusion concept
  • Gram stain is not the main study anchor

Associations

  • STI screening vocabulary
  • Trachoma vocabulary
  • Neonatal conjunctivitis vocabulary

Commonly confused with

  • Neisseria gonorrhoeae
  • Mycoplasma pneumoniae

Frequently asked questions

What is Chlamydia trachomatis?

An obligate intracellular bacterium used to teach elementary/reticulate body vocabulary and NAAT testing terminology.

What are the lab clues for Chlamydia trachomatis?

Lab clues for Chlamydia trachomatis include NAAT vocabulary, Intracellular inclusion concept, and Gram stain is not the main study anchor.

What is Chlamydia trachomatis commonly confused with?

Chlamydia trachomatis is commonly confused with Neisseria gonorrhoeae and Mycoplasma pneumoniae.

Original student-study summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment, dosing, or specimen-handling guidance.

OpenStax: Microbiology 2e organism classification foundations - sourceNCBI Bookshelf: Medical Microbiology organism chapters - sourceCDC: CDC disease and public-health topic pages - source