The ABO blood groups are not linked to the incidence of simple malaria infection but have been associated with rosette formation. In an effort to see if clinically severe malaria is associated with blood group, 489 patients were studied in Zimbabwe. Patients with malaria and group A blood had lower hemoglobin levels and more risk of coma than did infected patients with other blood groups. In this population, severe malaria is associated with blood group.
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Fischer et al. (1998) studied this question.
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