Table 5 Indoor resting density and blood feeding rates of An. gambiae s.l. collected by PSCs method after 2019, 2020 and 2021 IRS intervention in control communes and communes under IRS
Period (Insecticide) | Department | Communes | Nb of room | Nb of An. gambiae s.l. collected | Nb of blood feed | Rest density per room | Blood feeding rate | |||
|---|---|---|---|---|---|---|---|---|---|---|
Value | RR [95% CI] | P-value | Proportion (%) | P-value | ||||||
(Wald) | ||||||||||
After IRS 2019 (PM 300 CS) | Alibori | Bembèrèkè (control) | 60 | 94 | 75 | 1.6 | 1 | < 0.0001 | 79.8 | 1.00 |
Kandi + Gogounou (Under IRS) | 120 | 25 | 20 | 0.2 | 0.13 [0.08–0.21] | 80.0 | ||||
Donga | Bassila (control) | 30 | 139 | 112 | 4.6 | 1 | < 0.0001 | 80.6 | 0.23 | |
Djougou + Copargo (Under IRS) | 120 | 48 | 34 | 0.4 | 0.09 [0.06–0.12] | 70.8 | ||||
After IRS 2020 (Clo + Del) | Alibori | Bembèrèkè (control) | 60 | 189 | 130 | 3.2 | 1 | < 0.0001 | 68.8 | 0.48 |
Kandi + Gogounou (Under IRS) | 120 | 102 | 75 | 0.9 | 0.27 [0.21–0.35] | 73.5 | ||||
Donga | Bassila (control) | 60 | 201 | 140 | 3.4 | 1 | < 0.0001 | 69.7 | 0.49 | |
Djougou + Copargo (Under IRS) | 120 | 118 | 77 | 1.0 | 0.29 [0.23–0.37] | 65.3 | ||||
After IRS 2021 (Clo 50 WG) | Alibori | Bembèrèkè (control) | 80 | 69 | 42 | 0.9 | 1 | 0.1503 | 60.9 | 0.09 |
Kandi + Gogounou (Under IRS) | 160 | 171 | 125 | 1.1 | 1.24 [0.93–1.66] | 73.1 | ||||
Donga | Bassila (control) | 80 | 80 | 71 | 1.0 | 1 | 0.0033 | 88.8 | 0.62 | |
Djougou + Copargo (Under IRS) | 160 | 234 | 214 | 1.5 | 1.46 [1.13–1.91] | 91.5 | ||||