Table 3.
Mean chemical content and retention of active ingredient (AI) by LLIN brand
| Interceptor | PermaNet 2.0 | Yorkool | |
|---|---|---|---|
| Active ingredient | Alpha-cypermethrin | Deltamethrin | Deltamethrin |
| Number of nets | 19 | 10 | 15 |
| Mean age of nets (months) | 46.2 | 24.4 | 9.2 |
| Mean chemical content (g/kg), 95% CIb | 0.39 (0.005–0.879) | 0.67 (0.28–1.04) | 1.15 (0.005–0.879) |
| Relative standard deviation, % | 223.7 | 80.1 | 50.6 |
| % mean retention of AI | 5.82 | 47.9 | 85.2 |
| % nets within the tolerance limits of the target dose | 0% | 20% | 60% |
aThe target doses at baseline (tolerance limits of 25%) are 6.7 (5.025–8.375) g/kg, 1.4 (1.05–1.75) g/kg, and 1.8 (1.35–2.25) g/kg for Interceptor, Yorkool, and PermaNet 2.0 respectively. Within net variation is expressed by the relative standard deviation (RSD%)
bThe mean insecticide concentration was not significantly different between Yorkool, Interceptor, and PermaNet 2.0 (p > 0.05)