Fig. 1From: Insecticide resistance in Anopheles gambiae from the northern Democratic Republic of Congo, with extreme knockdown resistance (kdr) mutation frequencies revealed by a new diagnostic assayPercentage mortality to various insecticides with and without prior PBO exposure in each of the three study sites. Error bars show 95% binomial confidence intervals. The number of individuals tested is shown above each bar. For each insecticide, populations with significantly different mortalities (P < 0.05) are indicated by different letters whilst populations without significantly different mortalities share the same letter (z-ratio for independent proportions)Back to article page