Abstract
An observational clinical trial was conducted in New Halfa, eastern Sudan, in November and December 2003. Sixty-two patients with uncomplicated Plasmodium falciparum malaria were treated with oral quinine (10 mg/kg thrice daily for 7 d); 47 (76%) of these patients were followed-up to day 28, and 5 (10.6%) of them appeared to have late treatment failures. The parasitological failures were early R1 in two (4.3%) patients and late R1 in three (6.4%) patients. The reappearance of parasites in three of these five patients were true recrudescences rather than a re-infection, based on genetic evidence. The present results and those of earlier investigations indicate that the response to quinine in this area may be faltering.
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