Causes
The bacterium Chlamydia psittaci, present in the secretions and droppings of infected birds. It is spread by inhaling contaminated dust. Stress (transport, changes) makes it more likely to appear.
Diagnosis
Specific tests (PCR) on samples from the bird. Important because of the zoonotic risk.
Treatment
A specific antibiotic for a prolonged period, under veterinary supervision. Strict hygiene of the environment.
Prevention
Quarantine new birds, keep the cage clean, avoid overcrowding, reduce stress, and buy birds from reliable sources.

