A 33-year-old lady presented to our unit after multiple failed debridements of a foot ulcer developing after wading in stagnant water. Despite culturing polymicrobial flora and receiving long-term antibiotics the ulcer failed to improve. After presenting to our unit, all antibiotics were stopped for 7 days and several deep samples were taken which grew avid fast bacilli in several samples. Mycobacterium chelonae was cultured. Appropriate antibiotics were given resulting in complete healing of the ulcer.Chronic foot ulceration is usually associated with the presence of underlying vascular insufficiency or neuropathic disturbance. The presence of a persistent ulcer and the absence of these risks should alert one to initiate a search for alternative culprits. Atypical mycobacteria are ubiquitous. They have been recovered from water, soil, milk and food products. Risk factors for atypical bacterial infections should be ascertained and should involve a comprehensive review of their occupational and recreational activities in particular any history of penetrating injury or regular exposure to fresh water or seawater. Successful treatment involves suspecting and identifying the organism and treating with appropriate antibiotics.