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Table 6 Entomological indices of malaria vectors at the three time points in the two villages

From: Differential contribution of Anopheles coustani and Anopheles arabiensis to the transmission of Plasmodium falciparum and Plasmodium vivax in two neighbouring villages of Madagascar

Species Ambohitromby Miarinarivo
Time point HBR n (+) SR (%) EIR Time point HBR n (+) SR (%) EIR
Anopheles coustani T1 6.25 68 0 0 0 T1 5.50 65 0 0 0
T2 3.50 25 2 8.00 0.28 T2 8.08 95 5 5.26 0.43
T3 13.50 159 0 0 0 T3 25.75 297 7 2.36 0.61
Total 7.75 252 2 0.40 0.03 Total 13.11 457 12 2.63 0.34
Anopheles arabiensis T1 5.33 58 3 5.08 0.27 T1 1.33 16 0 0 0
T2 17.25 166 3 1.78 0.31 T2 6.75 81 3 3.70 0.25
T3 0.83 10 0 0 0 T3 2.67 32 0 0 0
Total 7.81 234 6 2.52 0.20 Total 3.58 129 3 2.34 0.08
Anopheles funestus T1 2.83 35 1 2.86 0.08 T1 0.75 14 0 0 0
T2 2.17 28 0 0 0 T2 1.17 16 1 6.25 0.07
T3 3.33 42 0 0 0 T3 4.92 77 1 1.30 0.06
Total 2.78 105 1 0.95 0.03 Total 2.38 107 2 1.87 0.04
All 3 species T1 14.42 163 4 2.45 0.35 T1 7.58 94 0 0 0
T2 22.92 222 5 2.25 0.52 T2 16.00 192 9 4.69 0.75
T3 17.67 215 0 0 0 T3 33.33 406 8 1.97 0.66
Total 18.33 600 9 1.50 0.27 Total 18.97 692 17 2.46 0.47
  1. Abbreviations: HBR, human-biting rate (the number of collected mosquitoes per number of human-night (12 at each time point in each village)). The HBR is expressed in bite/human/night (b/h/n); n, the number of anopheline mosquitoes collected by HLCs and analysed by real time PCR. The DNA was extracted from individual head-thorax; (+) corresponds to the number of Plasmodium positive samples confirmed by the TaqMan 18S; SR, sporozoite rate (the number of positive samples divided by the number of analysed samples (n), in %); EIR, entomological inoculation rate (EIR = HBR × SR). It is expressed as infective bite/human/night (ib/h/n)