Table 2.
Assessment of vectors distribution and abundance according to ecological factors
| Ecological factors | Aedes spp. | Ae. albopictus | Ae. aegypti | |||||
|---|---|---|---|---|---|---|---|---|
| Total N (%) | Total CEI | CEI | Median (IQR) | Statistic test | CEI | Median (IQR) | Statistic test | |
| Seasons | ||||||||
| Dry | 1432 (33) | 87.9 | 87.8 | 1.0 (0–5.6) | Z = 837.5, P = 0.47 | 0.1 | 0 (0–0) | Z = 706, P = 0.3 |
| Rain | 2919 (67) | 182.4 | 179.2 | 0.5 (0–3.5) | 3.1 | 0 (0–0) | ||
| Access to water | ||||||||
| Rain | 2358 (33) | 131.2 | 131.2 | 0.6 (0–6.8) | H = 2.36, df = 3, P = 0.5 | 0 | 0 (0–0) | H = 455, df = 3, P < 0.01 |
| Tap | 2105 (29) | 111.3 | 108.4 | 2.1 (0.4–4.7) | 3 | 0 (0–0) | ||
| River | 2551 (35) | 143.2 | 143.2 | 0.4 (0–5.9) | 0 | 0 (0–0) | ||
| Wells | 215 (3) | 13.4 | 13.4 | 0.0 (0–3.7) | 0 | 0 (0–0) | ||
| Vegetation type | ||||||||
| Herbaceous | 2003 (41) | 104.9 | 102 | 0.8 (0–4.4) | H = 21, df = 3, P < 0.001 | 3 | 0 (0–0) | H = 580, df = 3, P < 0.04 |
| Plantation | 1871 (38) | 100.7 | 100.7 | 9.8 (8–17) | 0 | 0 (0–0) | ||
| Tropical forest | 715 (15) | 28.5 | 28.5 | 0.1 (0–3.3) | 0 | 0 (0–0) | ||
| Urban forest | 281 (5.8) | 17.6 | 17.6 | 0.0 (0–0) | 0 | 0 (0–0) | ||
| Type of crops | ||||||||
| Hevea brasiliensis | 1761 (37) | 97.3 | 97.3 | 14.5 (9.1- 31) | H = 25.7, df = 2, P < 0.001 | 0 | 0 (0–0) | H = 464, df = 3, P = 0.2 |
| Manihot esculenta | 1778 (37) | 93.9 | 93.8 | 5.0 (3.1–7.5) | 0.1 | 0 (0–0) | ||
| No cultivated crops | 1210 (25) | 56.4 | 53.5 | 0.3 (0 -2.0) | 2.9 | 0 (0–0) | ||
| Presence of fruit trees | ||||||||
| No | 1926 (44) | 115.8 | 114.4 | 0.0 (0–2.1) | Z = 559, P = 0.05 | 1.4 | 0 (0–0) | Z = 792, P = 0.5 |
| Yes | 2425 (56) | 119.6 | 118.1 | 1.2 (0–5) | 1.6 | 0 (0–0) | ||
| Presence of breeding site | ||||||||
| No | 837 (19) | 51.3 | 51.3 | 0.1 (0 -3.1) | Z = 620.5, P = 0.10 | 0 | 0 (0–0) | Z = 644, P < 0.05 |
| Yes | 3514 (81) | 184.2 | 181.2 | 0.9 (0–5.3) | 3 | 0 (0–0) | ||
| Status of breeding sitea | ||||||||
| Negative | 686 (20) | 29.8 | 26.9 | 0.2 (0–0.8) | Z = 107.5, P < 0.001 | 2.9 | 0 (0–0.6) | Z = 349, P < 0.06 |
| Positive | 2828 (80) | 154.4 | 154.3 | 5.0 (1.1–8.4) | 0.1 | 0 (0–0) | ||
CEI Capture Effort Index, IQR inter-quartile range
aNegative or positive status means absence or presence, respectively, of larvae in the breeding site