Psittacosis in Birds: Signs, Treatment, and Human Risk

Last reviewed: August 2026. Psittacosis is a reportable zoonotic disease and human-case guidance shifts as outbreaks are investigated — always cross-check the CDC psittacosis page for the current outbreak status and human-symptom guidance before making decisions for your bird or your household.

Psittacosis — also called parrot fever — is one of the bird diseases owners fear most, and with reason. It has been documented in at least 465 bird species, and untreated it is often fatal to the bird and can also make people sick. Parrots and cockatiels are the most familiar hosts, but the bacterium has been found in poultry, waterfowl, pigeons, raptors, and colonial nesting seabirds.

Untreated psittacosis is often fatal, and mortality rates vary widely by species — Merck’s chlamydiosis chapter reports that serotypes A and D are highly virulent in turkeys and can cause mortality of 30% or higher, while many other species show lower mortality when clinically affected. What matters more than a single number is the picture around it: many infected birds are asymptomatic carriers and never show clinical signs at all; among the birds that do develop clinical disease, prognosis depends heavily on how early treatment is started, which species is involved, and whether other stressors are present. It is also zoonotic, meaning it can spread from birds to humans — the human-side of the disease is covered in its own section below.

What is Psittacosis, and what causes it? Does it have a cure? This article explores everything you need to know about the disease.

What Is Psittacosis?

Psittacosis in birds is a disease caused by Chlamydia psittaci – a bacterium that enters, multiplies, and actively attacks the cells of the infected bird. It mainly targets the tissues in the bird’s respiratory and digestive system, although it can attack any other part of the body.

There’s no limit to its destructive capabilities. It all depends on how the bacteria get into the body.

If an infected bird sheds Chlamydia psittaci in their poop, mucus, saliva, nasal discharge, or even feather dust, a healthy bird may end up inhaling the bacteria through airborne particles or ingesting it from contaminated food or water.

The bacteria can also be spread mechanically by parasitic mites and other biting arthropods, though these routes are far less important than direct inhalation of dust from infected birds’ droppings and secretions. The fact that it has multiple modes of transmission is part of what makes it so contagious.

Even being in a poorly ventilated room with an infected bird can cause your pet bird to get it. An infected mother bird can also transmit the bacteria to her brood before and/or after they hatch.

Psittacosis Symptoms

Infected birds can go for prolonged periods without showing any symptoms. The bacteria lay dormant inside the bird until they’re stressed.

Stress can be brought about by various factors like living in crowded conditions, changing their diet, or fighting off another infection that weakens their immune system leaving them vulnerable. That’s when they exhibit signs of infection.

Although these may vary widely depending on the bird species in question and how the infection occurred, most birds generally exhibit various combinations of the following symptoms.

Depression
Diarrhea
Discharge from the eyes and nasal area
Excessive urination
Fever
Fluffed up feathers
Labored breathing
Loss of appetite
Reduced vocalization
Trembling, seizures, and head twisting, although rare
Watery, crusty, and swollen eyes
Weakness and lethargy
Weight loss
Yellow or green poop

Unlike carriers of the bacteria, birds that come into contact with other infected birds or items (acute exposure) will usually show signs of illness within a three-day window.

Psittacosis Diagnosis

The symptoms of Psittacosis in parrots and cockatiels are quite similar to those of other bird diseases. Therefore, an avian vet may rely on blood tests and X-rays to give a positive Psittacosis diagnosis.

They may also carry out special tests like measuring the antibody levels present in the blood and swabbing the bird’s eyes, mouth, and vent to check for the presence of Chlamydia psittaci.

Psittacosis Treatment

Since bacteria cause the disease, treatment of infected birds involves administering antibiotics to cure them. Tetracyclines (Doxycycline, Oxytetracycline, or Chlortetracycline) are the most widely used antibiotics for treating Psittacosis.

Although the drugs may not eliminate the Chlamydia psittaci from the body, it may leave the bird a seemingly healthy carrier. This means there’s always a chance the bird could relapse again under stress.

The standard course is 45 days of uninterrupted doxycycline — a duration Merck’s chlamydiosis chapter explains is needed because C. psittaci is only killed during its active replication phase, and shorter courses can leave the bacterium hiding in cells to reactivate later. Some species (budgerigars) can be adequately treated in 30 days; longer courses beyond 45 days are used only when the vet has specific reason to extend based on the individual bird’s response. If the antibiotic is administered by mouth, dietary calcium has to be drastically reduced during treatment because calcium interferes with doxycycline absorption.

In severe cases, supportive care becomes as important as the antibiotic — warming, fluids to correct dehydration, assisted feeding for birds that have stopped eating, and treatment of secondary infections.

Doxycycline, in particular, is the drug of choice for many vets in the treatment of parrot and cockatiel psittacosis since it has less affinity for calcium, a longer half-life, and better tissue distribution. It is also better absorbed in the body compared to other Tetracyclines.

How to Protect Your Bird From Psittacosis

Hygiene plays an important role in preventing the disease from spreading. If you attend a bird show, for instance, ensure that you wash your hands thoroughly between handling different birds and before handling yours.

Any items you get for your feathery friend need to be disinfected. These include cages, toys, feeding containers, and anything else you plan to introduce to your bird.

If you intend to adopt or purchase a new pet bird, ensure that you quarantine them before introducing them to the ones already in your home. This will give you ample time to monitor and look out for any visible symptoms of Psittacosis.

During the quarantine period, be sure to practice good hygiene to prevent cross-contamination. This includes wearing a mask and disposable gloves when handling the bird.

Cage-cleaning disinfection matters for both the bird’s recovery and your own safety while handling. The specific disinfectants, concentrations, and PPE checklist — N95, gloves, wetting the cage before scraping — are in the Protecting yourself while cleaning section below.

What Psittacosis Looks Like in People

If you handled a bird that turns out to have psittacosis, you were exposed before the bird was diagnosed — not after. That’s why this section matters as much as the treatment section above. Psittacosis is uncommon enough in people that human doctors don’t screen for it unless you tell them about the bird, and the illness can look like a bad flu for the first several days before it becomes something more serious. Knowing what to watch for — and telling your doctor about the bird contact early — is the difference between a straightforward course of antibiotics and a hospital stay.

Symptoms and incubation in humans

Per the CDC, people usually develop symptoms 5 to 14 days after being exposed to a sick bird’s droppings, respiratory secretions, or feather dust. Early illness looks like an influenza-type picture: fever, headache, muscle aches, chills, and a dry cough that comes on within a day or two. Some people also develop shortness of breath, chest tightness, or a sore throat. In more severe cases the infection becomes pneumonia and needs prompt antibiotic treatment; hospitalization is sometimes necessary. Treated appropriately — usually with doxycycline — psittacosis is rarely fatal in humans.

When to see a doctor

If you develop flu-like symptoms in the days or weeks after handling a bird — especially one that was sick or later diagnosed with psittacosis — call your doctor and say so explicitly. The words matter: “I’ve been in contact with a bird that turned out to have psittacosis.” Human doctors do not routinely test for Chlamydia psittaci and will treat you for community-acquired pneumonia unless the bird exposure is on the chart. With that history in front of them, the appropriate antibiotic (usually doxycycline) can start early, when it works best.

Person-to-person spread

Person-to-person transmission of psittacosis is rare. You do not need to isolate yourself from your family after handling a sick bird, though the CDC notes that in unusual cases person-to-person spread has been documented. The important protective step is not household isolation — it is telling your doctor about the bird exposure early, so your own treatment happens on time.

Protecting yourself while cleaning a sick bird’s cage

The bacterium spreads on dried-droppings dust that becomes airborne when a cage is scraped or swept dry. The cleanup protocol below reflects the CDC and the National Association of State Public Health Veterinarians (NASPHV) guidance for owner-side handling of a suspected or confirmed psittacosis case:

Wear a well-fitted N95-type mask — surgical masks do not seal against the small dried-droppings particles that carry the bacterium.
Wear disposable gloves for any handling of the sick bird, its cage, its bedding, or its food and water dishes.
Wet the cage down before scraping — misting or lightly spraying the cage surfaces with disinfectant solution keeps the dried droppings from aerosolizing into breathable dust.
Wash your hands thoroughly with soap and water after every session of cage cleaning or bird handling, before touching your face or eating.
Disinfect with a 1:100 bleach solution — roughly half a cup of household bleach per gallon of water — on cage surfaces, food and water dishes, and any perch or toy that can be safely wetted.
Alternative disinfectants that work: 70% isopropyl alcohol on non-porous surfaces, or a 1:1,000 quaternary ammonium compound (products such as Roccal or Zephiran). Chlamydia psittaci is also killed by heat above 56°C (133°F) for five minutes, which makes hot-water dishwasher cycles a useful option for dishwasher-safe cage accessories.

If you are immunocompromised, pregnant, elderly, or caring for someone who is, the risk framing shifts — consider having someone else handle the cage cleaning while the bird is symptomatic and under treatment, and check in with your own physician about the exposure.

Frequently asked questions

Can I catch psittacosis from my bird?

Yes — psittacosis is a zoonotic disease that spreads from birds to humans. The most common route is inhaling dust that contains dried droppings, respiratory secretions, or feather particles from an infected bird. Owners, breeders, aviary workers, and veterinary staff are the most-exposed populations. Treatment for humans is straightforward when the diagnosis is caught early; the important step is telling your doctor about the bird contact.

What are the symptoms of psittacosis in humans?

Per the CDC, symptoms usually appear 5 to 14 days after exposure and start as flu-like illness: fever, headache, muscle aches, chills, and a dry cough. Some people develop shortness of breath or chest tightness. In more severe cases the infection progresses to pneumonia and needs prompt antibiotic treatment. If you develop these symptoms after handling a bird — especially one that was sick or later diagnosed with psittacosis — tell your doctor about the bird exposure so the appropriate antibiotic (usually doxycycline) can start early.

How do I protect myself when handling a sick bird?

Wear a well-fitted N95-type mask (surgical masks do not seal against dried-droppings dust) and disposable gloves. Wet the cage down before scraping so dust does not aerosolize. Wash your hands with soap and water after every session. Disinfect cage surfaces with a 1:100 bleach solution — about half a cup of household bleach per gallon of water — or 70% isopropyl alcohol, or a 1:1,000 quaternary ammonium compound. If you are immunocompromised, pregnant, or elderly, consider having someone else handle cage cleaning while the bird is symptomatic, and check in with your own physician about the exposure.

Prognosis: Caught Early, Most Birds Recover

Most birds diagnosed early with psittacosis recover fully after a complete course of treatment. Caught early and given the full 45-day course of doxycycline described above, prognosis for most clinically affected birds is genuinely good.

Keep in mind that although treatment may improve the overall health of the infected bird, it may remain a carrier of the bacteria. There’s always a chance of the bird relapsing under stress and infecting other birds in the process.

The best thing to do would be to ensure that your birds live in a non-stressful environment. Feed them a well-balanced diet to boost their immunity and uphold good hygiene practices to reduce their chances of getting sick from Psittacosis or any other opportunistic infections that could leave them vulnerable. If your bird looks ill, isolate them, and get in touch with a vet as soon as possible.

For more information on bird health, see how to talk to a licensed avian vet online, including options when no local vet sees birds.