The profile of IgG-antibody response against merozoite surface proteins 1 and 2 in severe Plasmodium falciparum malaria in Eastern Sudan

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Abstract
In this study, antibodies (Ab) directed against three MSP antigens; MSP119, MSP2A, and MSP2B were analyzed in blood samples obtained from 223 Sudanese patients who presented with either severe malaria (SM) or uncomplicated malaria (UM) and from 117 malaria-free donors (MF). The results showed that the prevalence of MSP Abs was associated with the clinical outcome of malaria infection, and the Ab prevalence was age-dependent (P < 0.0005). More importantly, the prevalence of MSP Abs against the test antigens was lower in SM compared to UM (P = 0.001 to 0.020), suggesting a protective role for these Abs against SM. Furthermore, the Ab responses between individual complications of SM were significantly different.

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