Table 3.
Factors associated with Aedes aegypti (adults or immatures) presence in 118 storm drains with accumulated water, Salvador, Brazil, 2015
| Characteristic | No. with available data | No. with Aedes aegypti (%) | Crude OR (95 % CI) | Adjusted OR (95 % CI) |
|---|---|---|---|---|
| Organic matter | ||||
| No organic matter | 22 | 3 (13.6) | 1 | |
| With organic matter | 96 | 15 (15.6) | 1.2 (0.3–4.5) | |
| Shade | ||||
| No shade | 64 | 9 (14.0) | 1 | |
| Indirect shade | 37 | 5 (13.5) | 1.0 (0.3–3.1) | |
| Direct shade | 17 | 4 (23.5) | 1.9 (0.5–7.1) | |
| Turbidity of watera | ||||
| No turbid | 61 | 7 (11.5) | 1 | |
| Turbid | 47 | 11 (23.4) | 2.4 (0.8–6.7) | |
| Water odora | ||||
| No odor | 51 | 10 (19.6) | 1 | |
| With odor | 59 | 8 (13.6) | 0.6 (0.2–1.8) | |
| Non-Aedes mosquitoesb | ||||
| Absent | 87 | 5 (5.8) | 1 | 1 |
| Present | 31 | 13 (41.8) | 11.8 (3.8–37.4) | 7.8 (2.3–25.8) |
| Water volumea | ||||
| ≤ 40 l | 57 | 14 (24.6) | 1 | |
| > 40 l | 58 | 4 (6.9) | 0.2 (0.1–0.7) | |
| Precipitation during the previous 7 days | ||||
| ≤ 50 mm | 53 | 15 (28.3) | 1 | 1 |
| > 50 mm | 65 | 3 (4.6) | 0.1 (0.0–0.5) | 0.2 (0.1–0.8) |
aData on water turbidity, odor and volume were not collected for 10, 10 and 3 storm drains, respectively
bNon-Aedes mosquitoes: includes adult mosquitoes and immatures