TABLE 1.

In vitro sensitivity of fresh clinical isolates of P. falciparum^a

Drug	No. of isolates	IC50 (geometric mean, nM)	95% confidence interval	Range
CQ	181	101.1	86.8-117.7	15.6-767.0
MDAQ	206	66.4	58.1-76.0	6.5-311.6
PQ	199	6.1	5.5-6.8	1.6-46.2
QN	196	94.4	80.4-110.8	15.4-760.9
LM	200	0.51	0.46-0.56	0.19-12.5
DHA	212	0.55	0.50-0.61	0.13-4.8

^aStandard cutoffs for drug sensitivity are 100 nM for CQ, 60 nM for MDAQ, and 600 nM for QN.