作者: Inbarani Naidoo , Cally Roper
关键词:
摘要: Sulfadoxine-pyrimethamine (SP) is used throughout Africa for intermittent preventive treatment (IPT) of malaria, but resistance threatens its efficacy. We found marked regional differences in the genotypes responsible SP when mapping recent surveys dihydrofolate reductase (dhfr) and dihydropteroate synthase (dhps) mutations. In West Africa, a 'partially resistant' combination dhfr N51I, N59R, S108N with dhps A437G predominates, whereas East 'fully A437G+K540E found. There are three African foci where populations have additionally acquired 581G and/or 164L to become 'super resistant'. SP-IPT infants pregnant women reported failed super resistant areas prompting review use affected areas.