Figure 4

Graphs of incidence rates. (Cases/1,000 population/year) (left panel) and parasite prevalence (%) (right panel) against distance to the nearest river with swamps in Iguhu (A and B), Emutete (C and D) and Mbale (E and F) in western Kenya.
Graphs of incidence rates. (Cases/1,000 population/year) (left panel) and parasite prevalence (%) (right panel) against distance to the nearest river with swamps in Iguhu (A and B), Emutete (C and D) and Mbale (E and F) in western Kenya.