High level of resistance of Plasmodium falciparum to sulfadoxine-pyrimethamine in children in Tanzania

A M Rønn, H A Msangeni, J Mhina, W H Wernsdorfer, I C Bygbjerg

129 Citations (Scopus)

Abstract

In many areas of tropical Africa affected by chloroquine-resistant Plasmodium falciparum, a combination of sulfadoxine and pyrimethamine (S-P) is used for alternative medication, especially in young children. In Magoda village in Muheza District, north-eastern Tanzania, 38 children 1-10 years of age were enrolled in a therapeutic study of S-P in July 1994. All had monoinfections of P. falciparum and an asexual parasite count of 1000-80,000/microL of blood. S-P was given as a single dose corresponding to 0.8-1.4 mg pyrimethamine/kg body weight. Of the 38 children followed up to day 7, 10 showed an S/RI response, 26 an RII response, and 2 an RIII response. Older children had lower pre-treatment parasitaemia and a better therapeutic response than younger children. Among the various contributory factors responsible for the poor therapeutic result, drug pressure from a prophylactic intervention with weekly dapsone-pyrimethamine between May 1993 and May 1994 seems to have been the most important.
Original languageEnglish
JournalTransactions of the Royal Society of Tropical Medicine and Hygiene
Volume90
Issue number2
Pages (from-to)179-81
Number of pages2
ISSN0035-9203
Publication statusPublished - 1996

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