Figure 8
Relationship between bednet coverage and malaria transmission. Field observations of village-level human biting rates (B), sporozoite prevalence (S) and entomological inoculation rate (EIR) An. gambiae s.l. and An. funestus are plotted as a function of recent (October 2001–September 2003) and historical (early to mid 1990's with reported bednet use rates approximating zero). Note that B and EIR reflect community-level means values for non-users of bednets and recent values of S can only be reported as an overall mean for the entire study area. Open circles: Individual villages included in recent surveys, filled circles: mean of all villages historically or recently. For An. gambiae s.l., expected trends based on simulation modelling is presented as continuous lines for bednets which confer 19, 36, 64 and 96 % protection against indoor exposure (See methods).