Figure 1

Results of rapid malacological and parasitological mapping assessment of the Sesse Islands, Uganda, in January 2010. (a) 23 sites surveyed for Biomphalaria snails, with spots coloured by abundance. Site 38 had two habitat types: 'a' denotes a marsh habitat, where B. sudanica snails were found, and 'b' denotes a lake habitat, where B. choanomphala were found. All other sites were lake habitats. (b) A total of 61 sites where school children were surveyed for intestinal schistosomiasis using Kato-Katz thick smears. Of these, 45 were investigated using both Kato-Katz and CCA urine dipsticks. The remaining sites, where only Kato-Katz thick smears were used, are marked with '*' and the results by location will be presented elsewhere (here the data were only used for overall prevalence estimates). CCA 'trace' results were considered infection-positive here. The location name, geographical coordinates and prevalence of schistosomiasis for each of the 45 sites is reported in Table 1, along with prevalence if CCA 'trace' was considered infection-negative.