Table 3.
Frequencies of kdr alleles in Anopheles gambiae M molecular form (A) and S molecular form (B) populations in continental Equatorial Guinea, 2009–2011, following several years of vector control*
| Site (A) | Intervention | 2N | L1014L | 95% CI | L1014S | 95% CI | L1014F | 95% CI |
|---|---|---|---|---|---|---|---|---|
| Akurenam | ITN | 56 | 1.8% | 3.5 | 19.6% | 10.4 | 78.6% | 10.7 |
| Bicurga | ITN | 40 | 0.0% | – | 20.0% | 12.4 | 80.0% | 12.4 |
| Evinayong | ITN | 20 | 0.0% | – | 20.0% | 17.5 | 80.0% | 17.5 |
| Mongomo | ITN | 8 | 0.0% | – | 12.5% | 22.9 | 87.5% | 22.9 |
| Niefang | ITN | 16 | 18.8% | 19.1 | 25.0% | 21.1 | 56.3% | 24.3 |
| Ayamiken | IRS | 54 | 0.0% | – | 18.5% | 10.4 | 81.5% | 10.4 |
| Ebebiyin | IRS | 16 | 18.8% | 19.1 | 0.0% | – | 81.3% | 19.1 |
| Etofili | IRS | 40 | 0.0% | – | 22.5% | 12.9 | 77.5% | 12.9 |
| Mbini | IRS | 196 | 8.2% | 3.8 | 6.1% | 3.4 | 85.7% | 4.9 |
| Site (B) | Intervention | 2N | L1014L | 95% CI | L1014S | 95% CI | L1014F | 95% CI |
| Bicurga | ITN | 332 | 0.3% | 0.6 | 28.6% | 4.9 | 71.1% | 4.9 |
| Evinayong | ITN | 390 | 4.9% | 2.1 | 26.4% | 4.4 | 68.7% | 4.6 |
| Niefang | ITN | 634 | 9.3% | 2.3 | 32.6% | 3.7 | 58.0% | 3.8 |
| Nsork | ITN | 244 | 22.1% | 5.2 | 11.1% | 3.9 | 66.8% | 5.9 |
| Ayamiken | IRS | 476 | 0.8% | 0.8 | 39.1% | 4.4 | 60.1% | 4.4 |
| Etofili | IRS | 62 | 0.0% | – | 32.3% | 11.6 | 67.7% | 11.6 |
| Mbini | IRS | 484 | 4.1% | 1.8 | 13.8% | 3.1 | 82.0% | 3.4 |
| Micomeseng | IRS | 148 | 4.7% | 3.4 | 37.8% | 7.8 | 57.4% | 7.8 |
| Nsok Nsomo | IRS | 484 | 1.7% | 1.2 | 15.5% | 3.2 | 82.9% | 3.4 |
| Average | 5.3% | 26.4% | 68.3% |
*
kdr = knockdown resistance; CI = confidence interval; ITN = insecticide-treated net; IRS = indoor residual spraying.