Table 1 Observed knockdown and mortality effect by insecticides on adult Anopheles stephensi reared from Awash Subah Kilo Town and Haro Adi village and susceptibility status as compared to WHO criteria, June 2021
Site | Insecticide diagnostic concentration (%) | No. exposed adult An. stephensi | Knockdown at 1 h, n (%) | No. (%) mortality at 24 hc | WHO criteria |
|---|---|---|---|---|---|
Awash Subah Kilo Town | aAlpha-cypermethrin 0.05% | 100 | 60 | 21 (21%) | Confirmed resistance |
aDeltamethrin 0.05% | 100 | 88 | 84 (84%) | Confirmed resistance | |
aPermethrin 0.75% | 100 | 88 | 64 (64%) | Confirmed resistance | |
bBendiocarb 0.1% | 100 | 0 | 3 (3%) | Confirmed resistance | |
bPropoxur 0.1% | 100 | 0 | 8 (8%) | Confirmed resistance | |
bPirimiphos-methyl 0.25% | 100 | 0 | None died | Confirmed resistance | |
Total | 600 | 236 (39.3%) | |||
Haro Adi village | aAlpha-cypermethrin 0.05% | 100 | 71 | 77 (77%) | Confirmed resistance |
aDeltamethrin 0.05% | 100 | 95 | 81 (81%) | Confirmed resistance | |
aPermethrin 0.75% | 100 | 94 | 74 (74%) | Confirmed resistance | |
bBendiocarb 0.1% | 100 | 0 | 1 (1%) | Confirmed resistance | |
bPropoxur 0.1% | 100 | 8 | 9 (9%) | Confirmed resistance | |
bPirimiphos-methyl 0.25% | 100 | 3 | 5 (5%) | Confirmed resistance | |
Total | 600 | 271 (45.2%) | |||