Koalas are one of Australia’s most treasured species, but many people don’t realise just how vulnerable they are to disease. In the Redlands and across South East Queensland, diseases like chlamydia and Koala Retrovirus (KoRV) are among the leading health challenges for koalas. These illnesses can cause blindness, infertility, weakened immune systems, and in some cases, can even be fatal.

Sadly, diseases spread quickly among wild populations, putting enormous strain on already declining numbers. But the good news is that the community can play a crucial role in helping sick koalas by learning how to spot the signs of illness early and reporting them.

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Common Koala Diseases

Chlamydia

Chlamydia affects a large proportion of koalas in Queensland. It can cause conjunctivitis (inflammation of the eyes) that may lead to blindness, cysts on the reproductive tract that cause infertility, and urinary tract infections often referred to as “wet bottom.” Left untreated, this disease can severely impact a koala’s quality of life and chances of survival.

Koala Retrovirus (KoRV)

KoRV is another serious condition that weakens a koala’s immune system, leaving them more vulnerable to infections and other illnesses. Koalas with KoRV often struggle to fight off even minor health problems, making rehabilitation more challenging.

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How to Spot a Sick Koala

Healthy koalas usually look well-fed, alert, and spend their time resting high in the trees. Sick koalas, however, often display noticeable changes in appearance and behaviour. Signs of illness can include:

• Inflamed or crusty eyes – may appear red, swollen, or closed.

• Wet bottom – stained or damp fur near the tail, often caused by urinary tract infections.

• Weight loss – thin body condition, visible bones, or poor coat quality.

• Unusual behaviour – sitting on the ground for long periods, being unusually approachable, or moving slowly.

• Weakness or lethargy – lack of energy to climb or remain in the trees.

If you notice any of these symptoms, it’s important not to approach or attempt to handle the koala yourself.

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What To Do If You See a Sick Koala

If you come across a koala that looks unwell, please call our 24/7 hotline immediately. Our trained volunteers will safely assess the animal, transport it to a wildlife hospital, and ensure it receives the care it needs.

Quick action can make all the difference. The sooner a sick koala is treated, the better its chances of recovery and release back into the wild.

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How the Community Can Help

Protecting koalas from disease isn’t just about rescue — it’s about awareness and prevention. Here are a few ways you can help:

• Report unwell koalas as soon as you see them.

• Support local wildlife hospitals and carers through donations or volunteering.

• Plant native trees to reduce stress on populations and strengthen their natural habitat.

• Spread awareness in your community about the signs of illness.

Every action adds up to healthier koala populations.

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Together for Koala Health

Koala diseases like chlamydia and KoRV are serious threats, but by working together, we can improve survival rates. Learning to spot the signs of illness and acting quickly gives sick koalas the best chance at recovery.

Your call could save a life.

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Spot the Signs of Illness

If you see a koala that looks thin, has inflamed eyes, or is behaving unusually, please call our 24/7 hotline straight away.