🦠microbiology review

Chlamydophila psittaci

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Chlamydophila psittaci is a Gram-negative bacterium that causes psittacosis, a zoonotic infectious disease primarily transmitted from birds to humans. It affects the respiratory system and can lead to severe pneumonia if untreated.

5 Must Know Facts For Your Next Test

  1. Chlamydophila psittaci is typically transmitted through inhalation of aerosolized bird droppings.
  2. Symptoms of infection include fever, headache, chills, muscle aches, dry cough, and pneumonia.
  3. Diagnosis often involves serological tests or polymerase chain reaction (PCR) assays to detect bacterial DNA.
  4. Treatment usually includes antibiotics such as tetracyclines or macrolides.
  5. Preventive measures include proper handling and care of pet birds and avoiding exposure to potentially infected avian species.

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