Figure 1.

Annual temperature profiles at five meteorological-stations in Kenya, 2011. Solid circles indicate daily minimum temperatures and open circles indicate daily maximum temperatures. These locations, arranged top-to-bottom from lowest to highest altitude, are presented regardless of malaria transmission levels (Mombasa [9], Lodwar [10], Garissa [11], Nairobi [12], Kitale [13]), as a sample of the diversity of local temperature conditions. The WHO recommends that insecticide resistance testing be conducted at 25°C [6], indicated by the solid red line (previously, 27°C [5]; dashed line). Data obtained from NOAA, http://www.ncdc.noaa.gov/cdo-web.