Table 4.
Viruses isolated in mosquito females and minimum field infection rates by month, Barkedji area, 2012-2013
| Virus | July | September | October | November | December | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Species | No | NP | P+ | MFIR | No | NP | P+ | MFIR | No | NP | P+ | MFIR | No | NP | P+ | MFIR | No | NP | P+ | MFIR | |
| WNV | Aedes dalzieli | 367 | 52 | 0 | 0.0 | 108 | 46 | 0 | 0.0 | 7 | 6 | 1 | 142.9 | 0 | 0 | 0 | 0.0 | 0 | 0 | 0 | 0.0 |
| Anopheles rufipes | 1 | 1 | 0 | 0.0 | 33 | 9 | 0 | 0.0 | 61 | 10 | 1 | 16.4 | 8 | 6 | 0 | 0.0 | 8 | 6 | 0 | 0.0 | |
| Culex antennatus | 46 | 15 | 0 | 0.0 | 176 | 77 | 0 | 0.0 | 990 | 71 | 2 | 2.0 | 96 | 35 | 1 | 10.4 | 0 | 0 | 0 | 0.0 | |
| Culex neavei | 12 | 6 | 0 | 0.0 | 669 | 97 | 3 | 4.5 | 1193 | 78 | 6 | 5.0 | 1721 | 128 | 13 | 7.6 | 104 | 25 | 0 | 0.0 | |
| Culex perfuscus | 155 | 16 | 1 | 6.5 | 222 | 64 | 0 | 0.0 | 64 | 21 | 0 | 0.0 | 0 | 0 | 0 | 0.0 | 0 | 0 | 0 | 0.0 | |
| Culex poicilipes | 19 | 6 | 0 | 0.0 | 3168 | 149 | 0 | 0.0 | 2401 | 114 | 1 | 0.4 | 1974 | 113 | 0 | 0.0 | 4 | 4 | 0 | 0.0 | |
| Culex quinquefasciatus | 4 | 2 | 1 | 250.0 | 13 | 6 | 0 | 0.0 | 23 | 3 | 0 | 0.0 | 20 | 5 | 0 | 0.0 | 20 | 5 | 0 | 0.0 | |
| Culex tritaeniorhynchus | 842 | 48 | 0 | 0.0 | 98 | 40 | 0 | 0.0 | 343 | 47 | 1 | 2.9 | 14 | 12 | 0 | 0.0 | 0 | 0 | 0 | 0.0 | |
| Total vectors | 1446 | 146 | 2 | 1.4 | 4487 | 488 | 3 | 0.7 | 5082 | 350 | 12 | 2.4 | 3833 | 299 | 14 | 3.7 | 136 | 40 | 0 | 0.0 | |
| USUV | Culex antennatus | 46 | 15 | 0 | 0.0 | 176 | 77 | 0 | 0.0 | 990 | 71 | 1 | 1.0 | 96 | 35 | 1 | 10.4 | 0 | 0 | 0 | 0.0 |
| Culex neavei | 12 | 6 | 0 | 0.0 | 669 | 97 | 3 | 4.5 | 1193 | 78 | 2 | 1.7 | 1721 | 128 | 4 | 2.3 | 104 | 25 | 0 | 0.0 | |
| Total vectors | 58 | 21 | 0 | 0.0 | 845 | 174 | 3 | 3.6 | 2183 | 149 | 3 | 1.4 | 1817 | 163 | 5 | 2.8 | 104 | 25 | 0 | 0.0 | |
| ACAV | Culex antennatus | 46 | 15 | 0 | 0.0 | 176 | 77 | 0 | 0.0 | 990 | 71 | 0 | 0.0 | 96 | 35 | 1 | 10.4 | 0 | 0 | 0 | 0.0 |
| Culex neavei | 12 | 6 | 0 | 0.0 | 669 | 97 | 0 | 0.0 | 1193 | 78 | 1 | 0.8 | 1721 | 128 | 4 | 2.3 | 104 | 25 | 0 | 0.0 | |
| Mansonia africana | 0 | 0 | 0 | 0.0 | 64 | 30 | 0 | 0.0 | 76 | 17 | 0 | 0.0 | 256 | 31 | 0 | 0.0 | 263 | 20 | 1 | 3.8 | |
| Total vectors | 58 | 21 | 0 | 0.0 | 909 | 204 | 0 | 0.0 | 2259 | 166 | 1 | 0.5 | 2073 | 194 | 5 | 2.8 | 367 | 45 | 1 | 2.7 | |
| BAGV | Culex antennatus | 46 | 15 | 0 | 0.0 | 176 | 77 | 0 | 0.0 | 990 | 71 | 1 | 1.0 | 96 | 35 | 0 | 0.0 | 0 | 0 | 0 | 0.0 |
| Culex neavei | 12 | 6 | 0 | 0.0 | 669 | 97 | 0 | 0.0 | 1193 | 78 | 0 | 0.0 | 1721 | 128 | 2 | 1.2 | 104 | 25 | 0 | 0.0 | |
| Total vectors | 58 | 21 | 0 | 0.0 | 845 | 0 | 0.0 | 2183 | 149 | 1 | 0.5 | 1817 | 163 | 2 | 1.1 | 104 | 25 | 0 | 0.0 | ||
| BARV | Aedes sudanensis | 15 | 8 | 0 | 0.0 | 517 | 103 | 1 | 1.9 | 111 | 36 | 0 | 0.0 | 2 | 2 | 0 | 0.0 | 0 | 0 | 0 | 0.0 |
| Culex neavei | 12 | 6 | 0 | 0.0 | 669 | 97 | 2 | 3.0 | 1193 | 78 | 4 | 3.4 | 1721 | 128 | 10 | 5.8 | 104 | 25 | 0 | 0.0 | |
| Total vectors | 27 | 14 | 0 | 0.0 | 1186 | 200 | 3 | 2.5 | 1304 | 114 | 4 | 0.0 | 1723 | 130 | 10 | 0.0 | 104 | 25 | 0 | 0.0 | |
| NDUV | Aedes dalzieli | 367 | 52 | 0 | 0.0 | 108 | 46 | 0 | 0.0 | 7 | 6 | 1 | 142.9 | 0 | 0 | 0 | 0.0 | 0 | 0 | 0 | 0.0 |
| Aedes vexans | 6603 | 187 | 0 | 0.0 | 1408 | 102 | 0 | 0.0 | 278 | 44 | 1 | 3.6 | 4 | 4 | 0 | 0.0 | 0 | 0 | 0 | 0.0 | |
| Anopheles rufipes | 1 | 1 | 0 | 0.0 | 33 | 9 | 0 | 0.0 | 61 | 10 | 1 | 16.4 | 8 | 6 | 0 | 0.0 | 8 | 6 | 0 | 0.0 | |
| Anopheles ziemanni | 6 | 6 | 0 | 0.0 | 1879 | 129 | 1 | 0.5 | 434 | 44 | 0 | 0.0 | 62 | 33 | 0 | 0.0 | 10 | 8 | 0 | 0.0 | |
| Culex antennatus | 46 | 15 | 0 | 0.0 | 176 | 77 | 0 | 0.0 | 990 | 71 | 0 | 0.0 | 96 | 35 | 0 | 0.0 | 0 | 0 | 0 | 0.0 | |
| Culex poicilipes | 19 | 6 | 0 | 0.0 | 3168 | 149 | 0 | 0.0 | 2401 | 114 | 1 | 0.4 | 1974 | 113 | 0 | 0.0 | 4 | 4 | 0 | 0.0 | |
| Mansonia uniformis | 0 | 0 | 0 | 0.0 | 2277 | 142 | 3 | 1.3 | 864 | 70 | 0 | 0.0 | 127 | 30 | 0 | 0.0 | 2 | 2 | 0 | 0.0 | |
| Total vectors | 7042 | 267 | 0 | 0.0 | 9049 | 654 | 4 | 0.4 | 5035 | 359 | 4 | 1.0 | 2271 | 221 | 0 | 0.0 | 24 | 20 | 0 | 0.0 | |
| SANV | Culex antennatus | 46 | 15 | 0 | 0.0 | 176 | 77 | 0 | 0.0 | 990 | 71 | 0 | 0.0 | 96 | 35 | 1 | 10.4 | 0 | 0 | 0 | 0.0 |
| Culex neavei | 12 | 6 | 0 | 0.0 | 669 | 97 | 0 | 0.0 | 1193 | 78 | 0 | 0.0 | 1721 | 128 | 4 | 2.3 | 104 | 25 | 0 | 0.0 | |
| Mansonia africana | 0 | 0 | 0 | 0.0 | 64 | 30 | 0 | 0.0 | 76 | 17 | 0 | 0.0 | 256 | 31 | 0 | 0.0 | 263 | 20 | 1 | 3.8 | |
| Total vectors | 58 | 21 | 0 | 0.0 | 909 | 204 | 0 | 0.0 | 2259 | 166 | 0 | 0.0 | 2073 | 194 | 5 | 2.8 | 367 | 45 | 1 | 2.7 | |
| SINV | Culex antennatus | 46 | 15 | 0 | 0.0 | 176 | 77 | 0 | 0.0 | 990 | 71 | 0 | 0.0 | 96 | 35 | 1 | 10.4 | 0 | 0 | 0 | 0.0 |
| Culex neavei | 12 | 6 | 0 | 0.0 | 669 | 97 | 1 | 1.5 | 1193 | 78 | 5 | 4.2 | 1721 | 128 | 6 | 3.5 | 104 | 25 | 0 | 0.0 | |
| Total vectors | 58 | 21 | 0 | 0.0 | 845 | 174 | 1 | 1.2 | 2183 | 149 | 5 | 2.3 | 1817 | 163 | 7 | 3.9 | 104 | 25 | 0 | 0.0 | |
| RVFV | Aedes ochraceus | 83 | 17 | 0 | 0.0 | 1250 | 110 | 1 | 0.8 | 516 | 53 | 0 | 0.0 | 5 | 4 | 0 | 0.0 | 0 | 0 | 0 | 0.0 |
| YAOV | Culex tritaeniorhynchus | 842 | 48 | 1 | 1.2 | 98 | 40 | 0 | 0.0 | 343 | 47 | 0 | 0.0 | 14 | 12 | 0 | 0.0 | 0 | 0 | 0 | 0.0 |
No: Number of female mosquitoes collected; NP: Number of pools; P+: number of positive pools; MFIR: minimum field infection rate (total number positive pools / the total number of mosquitoes tested *1000)