Figure 2.

The Frequency of combined Pfdhfr/dhps haplotypes in December 2001 (dark bars) and January 2003 (red bars) in Manhiça district in Manhiça district. After removing the PCR negatives and the samples with mixed haplotype infections (where a major haplotype could not be determined), N = 75 and 89 samples from survey 1 and 2, respectively.