Figure 2. . Genotype analysis of patient blood films. Restriction fragment length polymorphism are shown for Pfmsp2 and Pfcrt. Patient 1 and 2 are identical at the polymorphic Pfmsp2 (lanes 1 and 2), while unrelated patient controls (lanes 3 and 4) are different. One of the 2 negative controls is shown (lane 5). Genomic DNA from clone HB3 (lane 6) and isolate NF54 (lane 7) are also included as additional positive controls. All recent patient samples have the Plasmodium falciparum chloroquine-resistant genotype.