Figure 1.

The Frequency of Pfdhps (A) and Pfdhfr (B) haplotypes in December 2001 (black bars) and January 2003 (red bars) in Manhiça district. After removing the PCR negatives and the samples with mixed haplotype infections (where a major haplotype could not be determined), for Pfdhps, N = 104 and 115 and for Pfdhfr, N = 99 and 109 from survey 1 and 2, respectively.