Table 3.
Indoor resting density, parity rate, sporozoite and human blood meal index rate of Anopheles gambiae s.l. collected from village clusters with each LLIN intervention 2014/15
| LLIN treatment arm | Total resting indoors | Collection houses | An. gambiae s.l. per room per day (95% CI) | P value |
|---|---|---|---|---|
| Indoor resting density of An. gambiae s.l. | ||||
| Permethrin | 4624 | 1440 | 3.21 (3.16–3.26) | 0.001 |
| Permethrin + PBO | 5335 | 1440 | 3.70 (3.65–3.76) | |
| Deltamethrin | 2766 | 1440 | 1.92 (1.87–1.97) | 0.001 |
| Deltamethrin + PBO | 4385 | 1439 | 3.05 (3.00–3.10) | |
| LLIN treatment arm | Number dissected | Number parous | Parity rate % (95% CI) | P value |
|---|---|---|---|---|
| Parity rate of indoor resting An. gambiae s.l. | ||||
| Permethrin | 1577 | 1242 | 78.8 (76.7–80.8) | 0.08 |
| Permethrin + PBO | 1431 | 1089 | 76.1 (73.9–78.3) | |
| Deltamethrin | 1063 | 837 | 78.7 (76.3–81.2) | 0.05 |
| Deltamethrin + PBO | 1144 | 862 | 75.4 (72.9–77.9) | |
| LLIN treatment arm | Number tested | Number positive sporozoite | % sporozoite positive | P value |
|---|---|---|---|---|
| Sporozoite rate of indoor resting An. gambiae s.l. | ||||
| Permethrin | 1809 | 98 | 5.42 (4.37–6.46) | 0.06 |
| Permethrin + PBO | 1706 | 118 | 6.92 (5.71–8.12) | |
| Deltamethrin | 1311 | 52 | 3.97 (2.91–5.02) | 0.17 |
| Deltamethrin + PBO | 1645 | 50 | 3.04 (2.21–3.87) | |
| LLIN treatment arm | Number tested | Number positive human | % HBI (95% CI) | P value |
|---|---|---|---|---|
| Human blood meal index (HBI) of indoor resting An. gambiae s.l. | ||||
| Permethrin | 1078 | 603 | 55.9 (53.0–58.9) | 0.001 |
| Permethrin + PBO | 879 | 407 | 46.3 (43.0–49.6) | |
| Deltamethrin | 771 | 397 | 51.5 (48.0–55.0) | 0.79 |
| Deltamethrin + PBO | 883 | 449 | 50.8 (47.6–54.1) | |