Figure 4
Comparison of sero-positivity to malaria antigens for RDT- and filter paper-derived samples by age and transmission setting. Individuals were defined as sero-positive or -negative for MSP-119 (A, C) and AMA-1 (B, D) based on analysis of RDTs, and this data was compared to data from filter paper blood-spots [11]. Data were pooled from different sites within Same district (A, B; low malaria exposure) and Korogwe district (C, D; moderate malaria exposure). Incomplete data-points (i.e. only RDT or FP data available) were omitted. Most individuals were defined as seropositive or -negative by both FP and RDT-based serology (FP+ RDT+ and FP- RDT- respectively), while FP and RDT results were discordant (FP+ RDT- and FP- RDT+) for only a minority of individuals. Numbers of individuals are indicated on bars.