Fig. 2

Evolution of Anopheles gambiae (s.l.) resistance to pyrethroids (a 0.75% permethrin and 0.05% deltamethrin); organophosphates (b 1% fenitrothion and 5% malathion); carbamates (c 0.1% bendiocarb and 0.1% propoxur); organochlorine (d 4% DDT) insecticides in the city of Yaoundé. The error bars represent 95% confidence interval (CI)