Fig. 1

Percentage mortality of female Aedes aegypti from various locations across Malaysia toward two classes of insecticides and a synergist. Error bars represent 95% confidence interval (CI). Black horizontal line indicates resistant threshold level (mortality < 90% is considered phenotypically resistant; WHO, 2016). Statistically significant difference for the exposure with and without PBO is indicated by *P \(<\) 0.05; 0% indicates no mosquitoes died 24 h post-exposure