Msp-1 and msp-2 genotype composition in matched placental/peripheral samples and placental/cord blood samples with identical and partially concordant alleles, from infected women delivering in Thiadiaye, Senegal; the proportions of women with identical (black), completely discordant (white), and partially concordant alleles in matched samples are shown and the numbers of women are indicated. Three profiles are illustrated: msp-1 and msp-2 alleles taken separately and combined msp-1/msp-2 profiles. The group of matched samples with partially concordant alleles is subdivided into three subgroups with identical alleles in both compartments and additional alleles in (i) the placenta (light stripes), (ii) the peripheral or cord blood (heavy stripes), and (iii) both compartments (grey).