Parasitological findings at three cross-sectional surveys following a 6 months intervention period with different IPT regimes.

These parasitological data have been presented previously [10]. The prevalence figures presented here differ slightly from those in the previous publication because it was not possible to obtain data on parasite genotype for all the children in the study due to missing samples.aExcluding children with clinical malaria at survey, 28 days before and 7 days after.bDetermined by microscopy.*compared to the placebo group p