Pneumonia due to Chlamydia psittaci cannot be clinically differentiated from other community-acquired, atypical pneumonias, particularly pneumonia caused by Chlamydophila pneumoniae or Mycoplasma pneumoniae. The clinical presentation varies from a mild influenza-like illness to fulminating pneumonia complicated by multi-organ involvement. Molecular testing and/or serology is required to confirm the diagnosis. A chest x-ray is also recommended. Some patients may present with acute or chronic follicular conjunctivitis only. Although gestational psittacosis is rare, delays in diagnosis can lead to significant maternal and fetal morbidity and mortality.
Psittacosis is a notifiable condition in some countries.
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