Figure 5.

Detection of naturally acquired human antibody responses against Plasmodium vivax reticulocyte-binding protein (PvRBP) 2c, and PvRBP1a, and P. vivax Duffy-binding protein (PvDBP). Antibody responses were studied among 66 P. vivax–infected human plasma samples (dilution 1:200) against 9 recombinant proteins (8 PvRBP and 1 PvDBP). Seven healthy plasma samples from non–malaria-endemic regions with no history of malaria infections were used as controls. Bars indicate medians with ranges. *P < .05; †P < .01; ‡P < .001.