Fig. 7

The variation in the model-predicted Vgsc-995F frequency in malaria vector species for the year 2005 as the coverage of insecticide treated bed nets (ITNs) is increased. Within each country, the predicted frequency for a single point location is shown (see text). Solid circles represent the predicted frequency corresponding to an ITN coverage of zero over the years 2002–2005, which is close to the recorded ITN coverage over this period. Solid lines show the range of variation in the predicted frequency at these locations for the year 2005 as the ITN coverage is increased from 0 to 0.9. Results for four countries in west Africa (A) and five countries in central and east Africa (B) are shown. Black, blue, and green lines and circles represent predicted frequencies in An. gambiae, An. coluzzii, and An. arabiensis, respectively