El Amin, S.B. Malik, El F.M. Ahmed, El D.S. El Abadi, E.K. Mohamad, T.A. 2007 We assessed the efficacy of chloroquine and sulfadoxine pyrimethamine monotherapy in several sentinel sites in northern Sudan and the efficacy of combined therapy in 2 sites. Chloroquine efficacy in children under 5 years was also assessed in 2 sites in southern Sudan. Patients with indications of uncomplicated falciparum malaria and sufficient parasite density were enrolled. The chloroquine failure rates in the northern and southern sites were 43.4 and 80.2 respectively. Treatment failure was significantly higher in children than adults, while ...