Fig. 4From: Rapid evolution of insecticide resistance and patterns of pesticides usage in agriculture in the city of Yaoundé, CameroonEvolution of pyrethroid resistance in An. gambiae (s.l.) when pre-exposed to PBO in 2018 and 2019. (Delta, deltamethrin; PBO, piperonyl butoxide; Perm, permethrin). The error bars represent 95% confidence interval (CI)Back to article page