Table 2.

Prevalence of helminth and schistosomiasis infections in standard three school children in Malawi, by ecological area.

Nos infected/nos examined [%(range)]	Northern Highland	Central Highland	Central low/lakeshore	South Highland	South low/lakeshore	urban
No. children sampled	257	242	291	261	297	277
Schistosomiasis
S. mansoni	0	-	0	7 [1.3(0–4.3)]	0	0
S. haematobium	15 [7.4(0–14.8)]	6 [2.0(0–5.0)]	28 [9.5(0.4–18.5)]	14 [3.2(0–8.6)]	66 [23.2(3.3–43.1)]	11 [3.4(0–7.8)]
Mixed	-	-	-	1 [0.2(0–0.6)]	-	-
Any infection	15 [7.4(0–14.8)]	6 [2.0(0–5.0)]	28 [9.5(0.4–18.5)]	20 [4.4(0–11.8)]	66 [23.2(3.3–43.1)]	11 [3.4(0–7.8)]
Soil transmitted helminthiasis
Hookworm	7 [2.6(0.7–4.4)]	4 [1.8(0–3.6)]	0	3 [0.7(0–1.8)]	7 [1.9(0–4.0)]	5 [2.0(0–5.6)]
Ascaris	2 [0.5(0–1.5)]	1 [0.6(0–1.6)]	0	2 [0.4(0–1.1)]	2 [0.3(0–1.2)]	11 [5.1(0.6–9.5)]
Trichuris	-	-	-	-	-	-
Any helminths	9 [3.1 (0–6.4)]	5 [2.4(0–5.2)]	0	5 [1.0(0–2.7)]	8 [2.1(0–4.5)]	15 [6.6(1.3–12.0)]