Respiratory Chlamydiosis in Cockatiels: Psittacosis Signs and Treatment

Respiratory chlamydiosis in cockatiels is an infection caused by the bacterium Chlamydia psittaci. You may also hear your vet call it avian chlamydiosis or psittacosis. In cockatiels and other parrots, it can affect the eyes, nose, sinuses, lungs, liver, and digestive tract. Some birds look obviously sick, while others carry the organism and shed it off and on with only subtle signs.

When the respiratory form is present, pet parents often notice sneezing, tail bobbing, noisy breathing, crusting around the nostrils, or watery to thick eye discharge. That said, this disease does not stay neatly in one body system. A cockatiel with a "respiratory" presentation may also have weight loss, fluffed feathers, diarrhea, or green droppings because the infection can involve the liver and other organs.

This condition matters for two reasons. First, birds can become seriously ill if treatment is delayed. Second, C. psittaci is zoonotic, meaning it can spread from birds to people, usually through inhaled dust from dried droppings or respiratory secretions. If anyone in your household develops flu-like symptoms after exposure to a sick bird, contact a physician and mention possible psittacosis exposure.

Respiratory chlamydiosis is caused by infection with Chlamydia psittaci. Cockatiels usually become infected by inhaling or ingesting contaminated material from droppings, feather dust, eye secretions, or nasal discharge. Close contact with an infected bird is a common route, but the bacteria can also spread through contaminated cages, bowls, perches, and cleaning tools.

One tricky part of this disease is that some birds shed the organism intermittently. A cockatiel may look normal, then begin shedding during stress such as transport, breeding, crowding, rehoming, or another illness. That means a newly adopted bird, a bird returning from a show, or a bird housed near other parrots can introduce infection even if no one looked sick at first.

Cockatiels are among the pet bird species commonly associated with psittacosis. Poor ventilation, dusty environments, and delayed cleaning of droppings can increase exposure risk because dried material becomes airborne more easily. This is also why your vet may recommend isolation and careful hygiene for both the sick bird and any people handling the cage.

Your vet will start with a hands-on exam and a careful history, including recent bird purchases, boarding, travel, exposure to other birds, and any human illness in the home. Because psittacosis can look like other respiratory or systemic diseases, diagnosis usually requires lab testing rather than symptoms alone.

Common tests include PCR on combined choanal, conjunctival, and cloacal swabs to look for C. psittaci DNA. Your vet may also recommend bloodwork to check for inflammation, dehydration, or liver involvement, and sometimes radiographs if there is concern for pneumonia, air sac disease, or an enlarged liver. In some cases, paired testing or repeat testing is needed because infected birds do not shed the organism continuously.

A positive test helps confirm infection, but a negative result does not always rule it out if the bird was not shedding much at the time of sampling. That is why your vet may interpret test results together with the exam findings, droppings changes, and response to treatment. If psittacosis is strongly suspected, your vet may also discuss household safety steps and whether other birds in the home should be tested or managed as exposed.

Prevention starts with quarantine and screening. Any new bird should be kept separate from resident birds and examined by your vet before introductions. Because some birds shed C. psittaci intermittently, a healthy appearance is not enough to rule out infection. Your vet may recommend testing based on the bird's source, history, and any signs of illness.

Good air quality and cleaning habits matter. Clean droppings before they dry out and become dusty, and avoid sweeping or dry scraping material into the air. Damp-cleaning surfaces, changing cage papers regularly, washing bowls and perches, and improving ventilation can all reduce exposure. If a bird in the home is being evaluated for psittacosis, isolate that bird and use dedicated cleaning supplies until your vet advises otherwise.

Stress reduction also helps. Overcrowding, sudden environmental changes, poor nutrition, and repeated transport can increase shedding in infected birds. There is no widely used protective vaccine for pet cockatiels, so prevention relies on biosecurity, early veterinary attention, and careful flock management. If anyone in the household develops fever, cough, headache, or flu-like illness after contact with a sick bird or dusty cage material, contact a physician promptly and mention possible psittacosis exposure.