Cotonou Declaration oBuruli Ulcer Cotonou, Benin, 30 March 2009 Neglected tropical diseases kill, weaken or incapacitate millions of people every year, causing permanent physical suffering, social stigmatization and reduced productive capacity. Buruli ulcer, one such disease, causes immense suffering and disabilities, especially among children. Delayed schooling and loss of productivity are considerable among the affected populations. These adverse consequences tend to aggravate poverty in affected communities. Globally, the disease has been reported in 30 countries. In WHO’s African Region, Buruli ulcer has been confirmed in 12 countries and is suspected in 10 others. Significant progress has been made in the past 10 years in knowledge of Buruli ulcer, investments in related research, control of the disease, and improvement of tools for case diagnosis and development of treatment protocols. Substantial achievements have been made in diagnosis, treatment, immunology and epidemiology. Despite these achievements, little is known about the exact mode of transmission of the disease, and there is no simple diagnostic test usable in the field. The use of antibiotics has revolutionized treatment and contributed to reducing the need for surgery by half. However, efforts are still needed to develop simple diagnostic tools usable in the field as well as disability prevention methods. The Global Buruli Ulcer Initiative has adopted the strategy recommended by WHO. The strategy is based on early diagnosis of the disease and the use of antibiotics for treatment upon the onset of the first signs by improving access to screening and case management at the most peripheral level of the health system.