Buruli Ulcer Cases Increase Across Victoria and Parts of New South Wales

Health officials in Australia are reporting a rise in cases of the Buruli ulcer, a serious bacterial skin infection that has historically centered in Victoria and recently appeared along the New South Wales south coast. Victoria recorded 426 confirmed cases last year, maintaining its status as a major global area for the condition. Meanwhile, local acquisitions have been identified near Batemans Bay on the New South Wales South Coast.

The infection is caused by Mycobacterium ulcerans, a bacterium that produces a toxin capable of damaging skin and underlying tissue. While the exact transmission routes are not fully understood, research indicates that mosquitoes can transmit the bacteria to humans, with ulcers frequently developing on arms and legs near bite sites. Possums can also carry the pathogen and shed it in their droppings, which may introduce the bacteria into soil and subsequently into cuts or abrasions on human skin.

The condition typically begins as a small, painless lump, raised spot, or small swelling that can easily be mistaken for an ordinary insect bite. Because the bacteria can numb the affected area and suppress the local immune response, the early stages of the disease are often painless. As the condition progresses, the lump can enlarge, form a persistent scab, or develop into an ulcer with a widening area of damaged tissue.

According to clinical guidance, symptoms often do not appear until several months after exposure. The average interval between infection and the first sign of illness ranges from one to nine months, with an average of four to five months. Medical experts emphasize that the lack of initial pain does not mean the lesion is harmless, and individuals with persistent or enlarging wounds should seek professional medical evaluation.

Diagnosing a Buruli ulcer involves clinical assessment and laboratory testing. Physicians generally perform a polymerase chain reaction (PCR) test on a swab taken from an existing ulcer or lesion to detect genetic material from Mycobacterium ulcerans. Early and accurate recognition is vital to prevent extensive tissue damage and simplify the recovery process.

Treatment typically requires a course of prescription oral antibiotics lasting six to eight weeks, managed alongside appropriate wound care. In cases where tissue damage is extensive or wounds fail to heal properly, surgical intervention may be necessary. Healing can take several months or even up to a year, even with proper medical care.

Public health authorities stress that the infection does not spread directly from person to person, meaning confirmed patients generally do not need to isolate from family members or coworkers. However, because household members may share the same environmental exposure, anyone developing a suspicious skin lesion should seek a medical assessment promptly.

To lower the risk of infection, health officials recommend practical precautions when spending time outdoors in known transmission zones. Recommended measures include covering exposed skin, applying mosquito repellent, protecting wounds when handling soil, washing skin injuries thoroughly with soap and water, applying antiseptic, avoiding sick or injured possums, and removing standing water around homes where mosquitoes breed.