Table 5 Susceptibility test results of Anopheles stephensi in diagnostic and synergist assays
Type of assay | Insecticide class | Insecticide | Concentration | Percentage mortality (number tested) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2018 | 2019 | 2020 | ||||||||||||
Dire Dawa | Kebridehar | Dire Dawa | Kebridehar | Gewane | Semera | Awash Sebat Kilo | Awash Sebat Kilo | Meki | Metehara | Godey | ||||
Diagnostic dose | Pyrethroids | Permethrin | 0.75% | 79 (100) | 78 (100) | 86 (100) | 76 (100) | 68 (100) | 67 (100) | 39 (100) | 43 (100) | 72 (100) | 93 (100) | 10 (100) |
Deltamethrin | 0.05% | 54 (100) | 80 (100) | 64 (100) | 74 (100) | 31 (100) | 37 (100) | 68 (100) | 15 (100) | 59 (100) | 17 (100) | 7 (100) | ||
Alpha-cypermethrin | 0.05% | 82 (100) | 80 (100) | 30 (100) | 64 (100) | 20 (100) | 51 (100) | 69 (100) | 10 (100) | 33 (100) | 62 (100) | 1 (100) | ||
Carbamates | Bendiocarb | 0.05% | 19 (100) | 73 (100) | 4 (100) | 17 (100) | 60 (100) | 57 (100) | 5 (100) | 13 (100) | 4 (100) | 7 (100) | 20 (100) | |
Propoxur | 0.10% | 77 (100) | 68 (100) | 59 (100) | 38 (100) | 77 (100) | 99 (100) | 73 (100) | 19 (100) | 9 (100) | 17 (100) | 79 (100) | ||
Organophosphates | Pirimiphos-methyl | 0.25% | 100 (100) | 100 (100) | 27 (100) | 49 (100) | 92 (100) | 99 (100) | 93 (100) | 1 (100) | 0 (100) | 35 (100) | 67 (100) | |
Synergist assays | Pyrethroids | Permethrin | 0.75% | 69 (75) | 85 (75) | 70 (75) | 43 (75) | 43 (75) | 16 (75) | |||||
Permethrin + PBO | 0.75%/4% | 100 (75) | 100 (75) | 100 (75) | 100 (75) | 100 (75) | 100 (75) | |||||||
Deltamethrin | 0.05% | 45 (75) | 49 (75) | 67 (75) | 61 (75) | 21 (75) | 57 (75) | 39 (75) | 4 (75) | |||||
Deltamethrin + PBO | 0.05%/4% | 96 (75) | 100 (75) | 97 (75) | 100 (100) | 100 (75) | 100 (75) | 99 (75) | 92 (75) | |||||
Alpha-cypermethrin | 0.05% | 83 (75) | 31 (75) | 25 (75) | 9 (75) | 8 (75) | ||||||||
Alpha-cypermethrin + PBO | 0.05%/4% | 100 (75) | 93 (75) | 100 (75) | 100 (75) | 96 (75) | ||||||||