FIG. 1.

Prevalence of malaria parasitemia among 343 children, 10 days to 15 years old, during the dry season (January to March 1999) and among 365 children with the same age distribution at the end of the rainy season (October to November 1999), at Idere and Igbo-Ora, rural towns in southwestern Nigeria. The prevalence was calculated as the percentage of malarial parasite-positive individuals. The actual number of parasitemic cases is shown at the top of each bar. Open bars, dry season; filled bars, wet season.