Figure 5

Pattern of total IgG responses to single rPfAMA-1, rPfMSP-1 ₁₉ , and combined antigens in individuals infected with P. falciparum (n = 101). Ages are given in years. Cut-off values were 0.284, 0.323, 0.351, and 0.36 for PfAMA-1, PfMSP-1₁₉, combined antigens with 100 ng of each and 200 ng of each, respectively. The OD mean values have been divided into the following groups: OD > 1.5: High-positive antibody responses (black). 1 < OD < 1.5: Medium-positive responses (dark gray), OD < 1: Low-positive responses (pale gray), and OD < Cut-off: Negative (white).