Table 1.
Distribution of malaria vector species among the Anopheles samples caught in Nyabessan and Olama.
| Study Site | Species Distribution before Dam Construction | Species Distribution during Dam Construction | p-Value of 2-Sample Chi-Square Test for Equality of Proportions |
|---|---|---|---|
| 2000–2006 | 2014–2016 | ||
| Nyabessan | |||
| Nb. pnc. | 53 | 56 | |
| A. gambiae s.l. | 190 (5.1) | 358 (15.0) | <0.0001 |
| A. moucheti | 1455 (38.9) | 817 (34.2) | 0.0002 |
| A. ovengensis | 1992 (53.3) | 651 (27.2) | <0.0001 |
| A. paludis | 4 (0.1) | 524 (21.9) | <0.0001 |
| A. ziemanni | 0 | 11 (0.5) | 0.0001 |
| A. marshallii | 97 (2.6) | 14 (0.6) | <0.0001 |
| A. coustani | 0 | 13 (0.5) | <0.0001 |
| A. obscurus | 0 | 1 (0.04) | 0.8214 |
| Total | 3738 (100) | 2389 (100) | |
| Olama | |||
| Nb. pnc | 70 | 36 | |
| A. gambiae s.l. | 45 (0.9) | 10 (1.1) | 0.6503 |
| A. moucheti | 5037 (97.9) | 814 (89.0) | <0.0001 |
| A. nili | 10 (0.2) | 1 (0.1) | 0.8925 |
| A. paludis | 5 (0.1) | 4 (0.4) | 0.0460 |
| A. ziemanni | 41 (0.8) | 83 (9.1) | <0.0001 |
| A. marshallii | 9 (0.2) | 3 (0.3) | 0.5783 |
| Total | 5147 (100) | 915 (100) |
Nb. pnc.: Total number of person–night collection per site; Numbers in parentheses denote the proportion of each Anopheles species in relation to the total number of specimens caught.