Psittacosis (Chlamydiosis) in Conures: Symptoms, Testing, Treatment, and Human Risk

Psittacosis, also called avian chlamydiosis, is an infection caused by the bacterium Chlamydia psittaci. Conures and other parrots are among the bird groups most commonly affected. Some birds become clearly sick, while others carry the organism and shed it in droppings or respiratory secretions without obvious signs.

This disease matters for two reasons. First, it can make a conure seriously ill, especially if the infection spreads beyond the respiratory tract and becomes systemic. Second, it is zoonotic, which means it can spread from birds to people. In humans, exposure most often happens by breathing in contaminated dust from dried droppings or respiratory secretions.

In conures, psittacosis may show up as a vague illness rather than one dramatic symptom. A bird may seem quieter than usual, lose weight, sit fluffed, or have eye and nasal discharge. Because birds often hide illness until they are quite sick, even subtle changes deserve attention from your vet.

A diagnosis cannot be made at home. If you are worried about psittacosis, keep handling gentle and limited, avoid creating dust during cleaning, and arrange an exam with your vet as soon as you can.

Psittacosis is caused by the bacterium Chlamydia psittaci. Conures usually become infected by inhaling or ingesting material contaminated with droppings, feather dust, or respiratory secretions from an infected bird. The bacteria can spread bird-to-bird, especially in homes or aviaries where birds share air space, bowls, or close cage contact.

One challenge is that infected birds may shed the organism intermittently. That means a conure can test negative one day and still be infected, or appear healthy while exposing other birds. Stress can make shedding more likely. Common stressors include transport, rehoming, overcrowding, breeding, poor sanitation, and concurrent illness.

New birds are a common source of exposure. A conure brought home from a breeder, rescue, pet store, bird fair, or another household may look healthy but still carry the organism. Shared air space, stacked cages, and dusty cleaning practices can increase spread within a multi-bird home.

People usually become infected by breathing aerosolized dust from dried droppings or respiratory secretions. Less commonly, transmission may happen through bites or beak-to-mouth contact. Because of that human risk, suspected cases should be handled carefully until your vet helps guide testing and isolation.

Your vet will start with a physical exam and a careful history, including any recent new birds, travel, boarding, breeding activity, or illness in other birds. Because psittacosis can look like many other avian diseases, diagnosis usually involves a combination of tests rather than one single perfect test.

Common testing options include PCR testing on choanal and/or cloacal swabs, bloodwork such as a CBC and chemistry panel, and sometimes imaging like X-rays if your vet is concerned about pneumonia, airsacculitis, or liver enlargement. Some laboratories, including major veterinary diagnostic centers, offer avian Chlamydia PCR testing. Depending on the case, your vet may also recommend serology, repeat PCR testing, or testing of other birds in the household.

Testing can be complicated because birds may shed the bacteria off and on. A negative result does not always rule out infection if the bird was not shedding at the time of sampling. That is one reason your vet may recommend repeat testing, paired tests, or treatment decisions based on the full clinical picture.

If your conure dies unexpectedly and psittacosis is a concern, necropsy with laboratory testing may help confirm the diagnosis and protect other birds and people in the home. Do not clean the cage thoroughly before speaking with your vet, because samples from the environment and droppings may still be useful.

Prevention starts with new-bird quarantine and good daily hygiene. Any new conure or other bird should be kept separate from resident birds, ideally in a different air space, until your vet has examined the bird and discussed appropriate screening. Avoid sharing bowls, perches, toys, or cleaning tools between quarantine and resident birds.

Keep cages and food and water dishes clean, but clean them in a way that reduces dust. Wet surfaces with water or an appropriate disinfectant before scrubbing. Avoid dry sweeping or vacuuming dried droppings, because that can aerosolize infectious particles. Wash your hands well after handling birds, droppings, or cage items.

In multi-bird homes, reduce crowding and avoid stacking cages so droppings and debris do not fall from one bird to another. If a bird is suspected or confirmed to have psittacosis, isolate that bird and follow your vet's treatment and recheck plan carefully. There is no vaccine for psittacosis, so prevention depends on quarantine, sanitation, ventilation, and early veterinary attention.

Because people can get sick too, use gloves and a well-fitted mask when caring for a suspected infected bird or cleaning its enclosure. If anyone in the household develops fever, headache, muscle aches, or cough after bird exposure, they should contact a human healthcare professional promptly and mention the possible exposure to Chlamydia psittaci.