Transmission pathways of M. ulcerans

1. Possums ingest M. ulcerans from the environment and/or infected by an insect vector. 2. Possums amplify and shed M. ulcerans into the environment. 3. Insect vectors become contaminated with M. ulcerans from the environment and/or from contact with infected possums. 4. M. ulcerans transmitted to humans via insect vector and/or direct contact with contaminated environment.