Cost per infection of schistosomiasis averted for children and adults in four districts of Niger.

*Prevalence rates, SCI internal reports (unpublished). Base and follow up figures are significantly different at 95%CI (Table S3).**Based on full economic costs of $0.68 (2004) and $0.51 (2005)/treatment.∧Prevalence relates to baseline and follow up sample for year 1 in Tahoua region, no adults were monitored in the study area. Drop-out rate at follow up year 2 were high and sample composition differed from baseline.