Table 2

Reductions in parasite prevalence and mosquito densities after IRS.

Location

Survey period

Intervention

Nonintervention

Adjusted reduction (%)^†

P. falciparum prevalence (%)

Valley

Before intervention

63.61 [53.63, 73.61]

39.71 [32.24, 47.18]

Valley

After intervention

16.44 [7.81, 25.11]

29.62 [23.16, 36.09]

65.35

Uphill

Before intervention

44.86 [34.87, 54.85]

25.04 [17.57, 32.51]

Uphill

After intervention

18.53 [9.88, 27.18]

19.28 [12.81, 25.74]

46.35

An. gambiae density (female/house/night)

Valley

Before intervention

3.41 [1.04, 5.76]

2.06 [0, 5.14]

Valley

After intervention

0.17 [0, 2.28]

3.18 [0.42, 5.93]

96.82

Uphill

Before intervention

0.94 [0, 3.31]

0.61 [0, 4.11]

Uphill

After intervention

0.47 [0, 2.58]

0.63 [0, 3.05]

51.6

An. funestus density (female/house/night)

Valley

Before intervention

0.78 [0.25, 1.31]

0.23 [0.06, 0.39]

Valley

After intervention

0.06 [0, 0.54]

0.12 [0, 0.27]

85.26

Uphill

Before intervention

0.26 [0, 0.79]

0.08 [0, 0.25]

Uphill

After intervention

0.05 [0, 0.53]

0.05 [0, 0.19]

69.23

† Reduction in parasite prevalence and vector densities in the intervention valley and uphill area after intervention were adjusted assuming no change in the corresponding nonintervention valley or uphill area.

Zhou et al. Malaria Journal 2010 9:67   doi:10.1186/1475-2875-9-67