​Key facts

  • Buruli ulcer is a skin disease caused by the bacterium Mycobacterium ulcerans.
  • There have been four notified cases of Buruli ulcer in NSW.
  • Buruli ulcer is known to occur in some areas in Victoria, Queensland and the Northern Territory.
  • If you live in or visit these areas, be alert for signs of Buruli ulcer and see your doctor about any ulcers, wounds or bites that concern you.

On this page

What is Bu​ruli ulcer?

Buruli ulcer is a bacterial skin disease that damages the skin and soft tissue. It is usually found on arms and legs.

If it is not treated, the ulcers can become larger, causing a loss of skin and muscle. It can also lead to disability.

Buruli ulcer is commonly present in tropical and subtropical areas around the world. In Australia, it is common in Far North Queensland and Victoria. There have been some cases in New South Wales, but this is not common. Avoiding infection, finding out early and getting treatment is very important.

Buruli ulcer is sometimes called Bairnsdale ulcer, Daintree ulcer or Mossman ulcer.

What are the symptoms of Buruli ulcer?

Initial signs of Buruli ulcer include a painless lump, normally formed on the arms, legs or face.

Over time, the lump grows into a painless ulcer. Symptoms often appear 4-5 months after exposure.

If not treated, the ulcer will continue to grow into the skin tissue, muscle and bone. Sometimes the infection will not cause an ulcer. It may produce a lump, a rough patch on the skin, localised swelling or fever.

How does Buruli ulcer spread?

In Australia, Buruli ulcer most often spreads to humans from bites by mosquitoes carrying the bacteria. However, the bacteria that cause Buruli ulcer can also exist in soil or water in the environment.

People with a Buruli ulcer cannot spread it to other people.

Who is at risk of Buruli ulcer?

Anyone who is exposed to the bacteria may develop Buruli ulcer. People at greater risk include people who work or spend time outdoors or near soil or stagnant water.

Cases have been reported in:

  • Victoria
    • Greater Geelong
    • Mornington Peninsula
    • Bellarine Peninsula
    • Frankston/Bayside
  • Far North Queensland
    • Mossman
    • Daintree River
    • Capricorn Coast
  • New South Wales
    • Batemans Bay

How is Buruli ulcer prevented?

There is no vaccine for Buruli ulcer.

The best way to avoid getting sick, especially if you are in an area where Buruli ulcer is common, is to avoid mosquito bites:

  • Cover up: Wear light-coloured, long-sleeved shirts, long pants and enclosed shoes. Mosquitoes can bite through tight clothes.
  • Spray up: Apply mosquito repellent with picaridin, DEET or oil of lemon eucalyptus to all exposed skin. Natural or homemade repellents offer limited protection. Read the instructions to know when to reapply. Always apply sunscreen before repellent. Mosquito wristbands and patches are not recommended as there is no evidence that they provide good protection against mosquito bites.
  • Clean up: Remove stagnant water around the home to stop mosquito breeding sites.
  • Screen up: Use mosquito nets, and screen windows and doors.

If you are in an area where Buruli ulcer is common:

  • clean and cover cuts and grazes
  • limit outdoor activity, especially in areas near swamps and wetlands
  • be extra careful during sunrise and sunset, as these are the peak times when mosquitoes bite.

How is Buruli ulcer diagnosed and treated?

Visit your doctor if you think you have a Buruli ulcer infection. They will check your skin and may take a sample for testing. They may also ask if you have visited areas known to have Buruli ulcer.

If you have Buruli ulcer, your doctor will prescribe oral antibiotics for 6-8 weeks. Sometimes surgery may be required.

What is the public health response to Buruli ulcer?

Buruli ulcer is a notifiable disease in NSW.

This means that doctors and laboratory services need to inform their local public health unit of any cases of Buruli ulcer.

This helps to identify cases and outbreaks of Buruli ulcer. It also means NSW Health can provide you and the community with advice on how to reduce the risk of Buruli ulcer.

Related links

To find out where Buruli ulcer is common, visit:

For further advice, see:

Current as at: Tuesday 31 March 2026
Contact page owner: Health Protection NSW