Table 1. Baseline infection levels in three surveyed Kenyan communities, classified either as high-, moderate-, or low-intensity transmission zones for S. haematobium infection.

	Age Group	Transmission Zone
		High	Moderate	Low
Prevalence	Children	69%	32%	24%
	Adults	28%	14%	6.4%
Mean infection intensity (eggs per 10 mL urine)	Children	128	93	48
	Adults	21	13	4.5