<i>In vitro</i> IC₅₀s (nM) of 3D7 and 51 culture-adapted clinical isolates to four antimalarial drugs.

IC50 values are shown as mean ± standard deviation (SD). The mean IC50 of each clinical isolate was used to calculate the mean IC50 and SD for all isolates. The range of IC50 values of all clinical isolates is also shown for each drug. t-tests were used to compare the IC50 values between test samples and laboratory clone 3D7. Asterisk (*) indicates statistically significant difference from 3D7 after a Bonferroni correction (P<0.0009).