Abstract
OBJECTIVE--To investigate the effects of antimalarial chemoprophylaxis and other variables on the severity of falciparum malaria. DESIGN--Review of consecutive malaria cases between 1987 and 1991. SETTING--The Hospital for Tropical Diseases, London. SUBJECTS--250 consecutive cases of mild and 51 consecutive cases of severe falciparum malaria. RESULTS--Prophylaxis was taken in 52.4% (131/250) of the cases of mild malaria and 21.6% (11/51) of cases of severe malaria. Severe malaria was more common in white patients than in those of African origin and was also seen more commonly in people returning from central, southern, and east Africa than in those returning from west Africa. Patients with severe malaria presented sooner than patients with mild malaria. CONCLUSIONS--Prior chemoprophylaxis led to a reduction in the severity of falciparum malaria. Ethnic origin, time to presentation, and sex were also associated with the severity of malaria.
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