Table 1 Density, Sporozoite prevalence and Transmission index of specimens collected at sentinel sites in Bioko, 2004–2005
| Â | Pre spray | Post spray 1 | Post spray 2 | Post spray 3 |
|---|---|---|---|---|
An. gambiae s.l. | Â | Â | Â | Â |
   No. caught | 2389 | 7427 | 341 | 136 |
   No. analysed for species identification | 719 | 1017 | 230 | 77 |
   Proportion An. gambiae s.s. (%) | 82 | 97 | 88 | 90 |
An. gambiae s.s. | Â | Â | Â | Â |
   No. estimated | 1959 | 7204 | 300 | 122 |
   No. per trap per 100 nights | 23.9 | 25.5 | 1.9 | 1.7 |
   Sporozoite rate | 6.0(n = 586) | 1.4(n = 985) | 0(n = 203) | 0(n = 69) |
   Transmission index § | 1.4 | 0.36 | 0 | 0 |
   Transmission index relative to baseline | 1 | 0.26 | 0 | 0 |
An. melas | Â | Â | Â | Â |
   No. estimated | 430 | 223 | 41 | 14 |
   No. per trap per 100 nights | 5.3 | 0.8 | 0.3 | 0.2 |
   Sporozoite rate | 8.3(n = 133) | 3.1(n = 32) | 0(n = 27) | 0(n = 8) |
   Transmission index§ | 0.44 | 0.03 | 0 | 0 |
   Transmission index relative to baseline | 1 | 0.07 | 0 | 0 |
An. funestus | Â | Â | Â | Â |
   No. caught | 1920 | 874 | 10 | 3 |
   No. analysed for species identification | 372 | 215 | 1 | 0 |
   No. per trap per 100 nights | 23.5 | 3.1 | 0.06 | 0.04 |
   Sporozoite rate | 4.0(n = 372) | 2.3(n = 215 | 0(n = 1) | * |
   Transmission index§ | 0.94 | 0.07 | * | * |
   Transmission index relative to baseline | 1 | 0.08 | * | * |