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Table 2 Entomological inoculation rate (EIR) of An. gambiae observed during IRS campaign and following IRS withdrawal

From: A shift from Indoor Residual Spraying (IRS) with bendiocarb to Long-Lasting Insecticidal (mosquito) Nets (LLINs) associated with changes in malaria transmission indicators in pyrethroid resistance areas in Benin

   During IRS Following IRS withdrawal   
   (Apr.-Dec. 2010) (Apr.-Dec. 2011)   
Localities Variables 3rdround of IRS 4thround of IRS Total EIR/period April-July Aug.-Dec. Total EIR/period IDR Comparison EIR/period
   (Apr.-Jul.) (Aug.-Dec.) (Apr.-Dec.)     (Apr.-Dec.)   95% IC  
Adjohoun central area Thorax 4 4 8 0 25 16 41 5.2 p<0.001
Thorax+ 0 0 0 1 0 1
Is 0 0 0 0.04 0 0.02
EIR 0 0 0 0.04 0 0.02
Adjohoun peripheral area Thorax 15 10 25 7.33 39 27 66 12.83 1.75 [1.72-1.78] p<0.001
Thorax+ 2 0 2 2 1 3
Is 0.13 0 0.08 0.05 0.04 0.05
EIR 0.07 0 0.03 0.07 0.03 0.05
Dangbo central area Thorax 13 2 15 0 11 9 20 0 1 p=1
Thorax+ 0 0 0 0 0 0
Is 0 0 0 0 0 0
EIR 0 0 0 0 0 0
Dangbo peripheral area Thorax 93 14 107 19.29 48 17 65 5.23 0.27 [0.27-0.28] p<0.001
Thorax+ 3 1 4 0 1 1
Is 0.03 0.07 0.04 0 0.06 0.02
EIR 0.11 0.04 0.07 0 0.02 0.02
Missérété central area Thorax 12 5 17 0 38 16 54 3.09 p<0.001
Thorax+ 0 0 0 1 0 1
Is 0 0 0 0.03 0 0.02
EIR 0 0 0 0.02 0 0.01
Missérété peripheral area Thorax 44 32 76 4.82 45 58 103 27.07 5.61 [5.53-5.69] p<0.001
Thorax+ 1 0 1 4 2 6
Is 0.02 0 0.01 0.09 0.03 0.06
EIR 0.04 0 0.02 0.15 0.04 0.1
Sèmè central area Thorax 80 58 138 36.27 121 9 130 25.85 0.71 [0.71-0.72] p<0.001
Thorax+ 2 0 2 6 0 6
Is 0.03 0 0.01 0.05 0 0.05
EIR 0,41 0 0.13 0.2 0 0.1
Sèmè peripheral area Thorax 73 34 107 14.73 166 43 209 7.44 0.5 [0.5-0.51] p<0.001
Thorax+ 1 0 1 2 0 2
Is 0.01 0 0.01 0.01 0 0.01
EIR 0.13 0 0.05 0.06 0 0.03
Adjara central area Thorax 44 83 127 96.01 15 2 17 8.1 0.08 [0.04-0.17] p<0.001
Thorax+ 3 6 9 2 0 2
Is 0.07 0.07 0.07 0.13 0 0.12
EIR 0.45 0.25 0.36 0.06 0 0.03
Adjara peripheral area Thorax 120 104 224 536.15 516 257 773 124.2 0.23 [0.19-0.28] p<0.001
  Thorax+ 14 9 23   23 6 29    
  Is 0.12 0.09 0.1   0.04 0.02 0.04    
  EIR 3.83 0.5 1.99   0.61 0.17 0.46    
  1. Thorax +: positive thorax.
  2. Is sporozoïtique.
  3. EIR Entomological Inoculation Rate (infected bite/man/night).
  4. IDR Incidence Density Ratio.
  5. IC Confidence interval.