Table 3 Effect of intervention on prevalence of P. falciparu m and hookworms at different time points among primary schoolchildren in Burma Valley farming area (n = 420) in Zimbabwe

P. falciparum

Overall

28.3(24.1-32.9)

12.9(9.8-16.4)

12.4(9.4-15.9)

8.1(5.7-11.1)

Sex

   Males

26.1(20.4-32.5)

11.5(7.6-16.5)

12.4(8.3-17.5)

9.2(5.7-13.8)

   Females

30.7(24.4-37.6)

14.4(9.8-20.0)

12.4(8.2-17.7)

6.9(3.8-11.4)

S. haematobium

Overall

55.2(50.3-60.1)

14.3(11.1-18.0)

13.3(10.2-17.0)

30.7 (26.3-35.4)

Sex

   Males

52.8 (45.9-59.5)

12.4 (8.3-17.5)

13.3 (9.1-18.5)

34.4 (18.1-41.1)

   Females

57.9 (50.8-64.8)

16.3 (11.5-22.2)

13.4 (9.0-18.4)

26.7 (20.8-33.4)

S. mansoni

Overall

22.6(18.7-26.9)

4.0(2.4-6.4)

4.5(2.7-7.0)

17.4(13.9-21.4)

Sex

   Males

28.4 (22.6-34.9)

3.2 (1.3-6.5)

4.6 (2.2-8.3)

15.6 (11.1-21.1)

   Females

16.3 (11.5-22.2)

5.0 (2.4-8.9)

4.5 (2.1-8.3)

19.3 (14.1-25.4

Hookworm

Overall

23.8(19.8-28.2)

8.6(6.1-11.7)

7.1(4.9-10.0)

15.7(12.4-19.6)

Sex

   Males

27.5(21.7-34.0)

9.6(6.1-14.3)

7.3(4.3-11.6)

15.6(11.0-21.1)

   Females

19.8(14.5-26.0)

7.4(4.2-12.0)

6.9(3.8-11.4)

15.8(11.1-21.6)