Figure 2From: Artemether resistance in vitro is linked to mutations in PfATP6 that also interact with mutations in PfMDR1 in travellers returning with Plasmodium falciparum infectionsAssociation of elevated pfmdr1 copy number coupled with the presence or absence of the pfatp6 haplotype (A623E/S769N) and IC 50 values for artemether. Mean individual IC50 values are shown for non-mutant (pfatp6 A623/S769 and a pfmdr1 copy number of 1 (CN1), open circles) and mutant parasite isolates containing either pfatp6 623E/769 N and a pfmdr1 copy number of 1 (closed squares), pfatp6 A623/S769 and a pfmdr1 copy number of 2 (CN2, closed triangles) or pfatp6 623E/769 N and a pfmdr1 copy number of 2 (closed diamonds). The horizontal lines illustrate the mean IC50 values for each group, with 95% CI values of 5.9-11.6, -4.3-15.5, 5.2-15.4 and 10.7 to 21.8 for A623/S769/CN1, A623/S769/CN2, 623E/769 N/CN1 and 623E/769 N/CN2, respectively. **, p = 0.0068; *, p = 0.02.Back to article page