Continued efficacy of sulfadoxine-pyrimethamine as second line treatment for malaria in children in Guinea-Bissau

Kofoed, P.-, E; Rodrigues, A; Aaby, P; Rombo, L; (2006) Continued efficacy of sulfadoxine-pyrimethamine as second line treatment for malaria in children in Guinea-Bissau. Acta tropica, 100 (3). pp. 213-7. ISSN 0001-706X DOI:

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BACKGROUND: Sulfadoxine-pyrimethamine (S/P) is widely used for treatment of failures following the first line treatment for malaria in Africa. In Guinea-Bissau, it has been recommended as second line therapy by the National Malaria Programme since 1996. In order to monitor any change of the in vivo sensitivity, the efficacy of S/P was studied immediately before the introduction of the drug and 6-9 years later. METHODS: Children participating in clinical in vivo studies were given S/P if having late clinical treatment failure following the treatment with quinine, chloroquine, or amodiaquine. Parasitological and clinical failures were evaluated during a 35-day follow-up. During the first study period whole blood sulfadoxine concentrations were measured on day 7. RESULTS: Altogether, 56 children failed the initial treatment and were included in 1995/1996 as well as 55 children in 2002/2004. The PCR-uncorrected adequate clinical and parasitological response rates on day 28 were 94% and 91%, and on day 35 they were 89% and 91%, respectively, in the two periods. No difference between median blood drug concentration in children with and without treatment failure was observed. INTERPRETATION: The efficacy of S/P as second line treatment for uncomplicated malaria has remained unchanged in spite of a relatively high level of genetic markers associated with Plasmodium falciparum resistance to S/P previously found in the area.

Item Type: Article
Faculty and Department: Faculty of Infectious and Tropical Diseases > Dept of Disease Control
PubMed ID: 17173847
Web of Science ID: 244572800007


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