Table 1.

Prevalence of schistosomiasis and Soil Transmitted Helminths in Malawi primary schools survey, 2002

Schistosomiasis	Prevalence {high intensity} – (95% confidence intervals)
S. mansoni	0.4 (0–1.3) %
S. haematobium*	6.9 (1.9–11.9)% {2.5 (0.2–4.9) %}
Mixed	7.7 (2.2–13.2)%
Soil transmitted helminthiasis
Hookworm	1.3 (0.4–2.3)% {0}
Ascariasis	0.5 (0.1–1.0)% {0}
Trichuriasis	0.0
Any infection	1.8 (0.6–3.1)% {0}

*Heavy intensity S. haematobium > or = 50 eggs/ 10 ml or visible haematuria