1C22

ICD-11 MMS 2026-01

Infections due to Chlamydia psittaci

Description

Any condition caused by an infection with the gram-negative bacteria Chlamydia psittaci. These conditions are characterised by variable clinical presentations such as fever, cough, headaches, chills, fatigue, nausea, vomiting, diarrhoea, or pneumonia. Transmission is commonly by inhalation of aerosol contaminated with body fluids from infected birds, or direct contact with infected birds. Confirmation is by identification of Chlamydia psittaci.

Index terms

  • Infections due to Chlamydia psittaci
  • Chlamydophila psittaci infection
  • Infections due to Chlamydophila psittaci
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  • ornithosis
  • parrot fever
  • psittacosis

Inclusions

  • ornithosis
  • parrot fever
  • psittacosis

Exclusions from above levels

  • NE83.1 – Infection arising from device, implant or graft, not elsewhere classified

Sibling codes

  • 1C20 – Chlamydial conjunctivitis
  • 1C21 – Chlamydial peritonitis
  • 1C23 – Trachoma
  • 1C2Y – Other specified diseases due to chlamydiae
  • 1C2Z – Diseases due to chlamydiae, unspecified

Foundation entity

Infections due to Chlamydia psittaci – http://id.who.int/icd/entity/1937339080

Allowed postcoordination axes

Part of: 01: Certain infectious or parasitic diseases