Table 5 Description of the quantitative physical, biological and chemical parameters recorded for the open water collection sites in the ten study areas of Dakar, depending on breeding status.
From: Highly focused anopheline breeding sites and malaria transmission in Dakar
Parameters | Â | Anopheline larvae and pupae absent | Anopheline larvae and pupae present |
|---|---|---|---|
Perimeter (metres) | n collection sites = 54 | 43 | 36 |
| Â | n observations = 326 | 196 | 130 |
|  | Range | 0.3 – 579.3 | 0.4 – 1973.6 |
|  | Mean and 95% CI | 36.3 [26.0–46.7] | 148.4 [76.6–220.2] |
|  | 25–50–75 percentiles | 6.3 – 16.7 – 39.5 | 9.8 – 29.7 – 75.6 |
Temperature (°C) | n collection sites = 54 | 40 | 34 |
| Â | n observations = 248 | 152 | 96 |
|  | Range | 25.0 – 39.0 | 25 – 40 |
|  | Mean and 95% CI | 29.5 [29.1–29.9] | 31.7 [30.9–32.5] |
|  | 25–50–75 percentiles | 28 – 29 – 30 | 28 – 31 – 34 |
Turbidity | n collection sites = 54 | 35 | 31 |
| Â | n observations = 225 | 135 | 90 |
|  | Range | 0 – 26 | 0 – 26 |
| Â | Mean and 95% CI | 9 [7-10] | 16 [14-17] |
|  | 25–50–75 percentiles | 0 – 4 – 17 | 8 – 19 – 23 |
Surface vegetation (%) | n collection sites = 54 | 43 | 36 |
| Â | n observations = 324 | 194 | 130 |
|  | Range | 0 – 100 | 0 – 90 |
| Â | Mean and 95% CI | 32 [27-36] | 18 [13-22] |
|  | 25–50–75 percentiles | 2 – 10 – 60 | 0 – 5 – 20 |
Sunlight (%) | n collection sites = 54 | 42 | 34 |
| Â | n observations = 319 | 193 | 126 |
|  | Range | 0 – 100 | 0 – 100 |
|  | Mean and 95% CI | 63 [59–67] | 69 [64–74] |
|  | 25–50–75 percentiles | 50 – 70 – 95 | 50 – 70 – 100 |