A Buruli Ulcer (also known as a Bairnsdale Ulcer or Daintree Ulcer) is a bacterial infection of the skin caused by the bacterium Mycobacterium Ulcerans, which belongs to the same family of bacteria as tuberculosis and leprosy. These bacteria produce toxins which can damage skin, fat and blood vessels, causing a painless ulcer to develop. It’s not known for sure how humans get infected, but the bacteria that cause a Buruli Ulcer occur naturally in the environment. Mycobacterium Ulcerans has been found in soil, insects and even in possum poo. In Australia, it’s thought that mosquitoes may spread the infection from possums to humans, but it’s not certain if this is the case.