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Prevalences of dihydrofolate reductase (DHFR) and dihydropteroate synthase (DHPS) mutations in Plasmodium falciparum parasites infecting the children in the trimethoprim-sulfamethoxazole (TS) group at baseline (microscopy-positive asymptomatic infections) and after 1 month of TS prophylaxis (microscopy-negative, polymerase chain reaction–positive asymptomatic infections).
