Fosmidomycin-clindamycin (30 mg/kg and 10 mg/kg) given twice daily for three days is an effective and safe combination of antibiotics which demonstrated good activity against malaria parasite in previous phase II studies in African children. In this phase III trial, the efficacy and safety of the combination will be evaluated in African children with uncomplicated P. falciparum malaria. A single dose of sulfadoxine-pyrimethamine, the standard antimalarial in Gabon, is used as comparator.