Skip to main content

Table 4 Infectiousness of Anopheles arabiensis and Anopheles funestus mosquitoes caught indoors and outdoors the rice farms

From: Protecting migratory farmers in rural Tanzania using eave ribbons treated with the spatial mosquito repellent, transfluthrin

  Indoors Outdoors
Anopheles arabiensis Anopheles funestus Anopheles arabiensis Anopheles funestus
Total mosquitoes analysed 4465 5145 306 868
Number of households 24 24 24 24
Number of trapping nights 69 69 69 69
Mosquito/household/night 2.70 3.11 0.18 0.52
Corrected biting rate 3.53 3.29 0.03 0.63
Plasmodium positive mosquitoes 1 10 0 3
Sporozoite rate 0.0002 0.0019 0 0.0035
EIR 0.0006 0.0060 0 0.0018
Annual EIR 0.2204 2.2041 0 0.6612
Corrected EIR 0.0008 0.0064 0 0.0022
Corrected Annual EIRa 0.2887 2.3363 0 0.7935
EIR contribution indoors and outdoors 9% 91% 0 100%
Corrected EIR contribution indoors and outdoors 4% 96% 0 100%
Overall EIR contribution 7% 71% 0 22%
Overall corrected EIR contribution 3% 64% 0 33%
  1. Corrected biting rate indoor = mosquito/household/trap × relative efficacy of CDC-LT to HLC [53], i.e., 0.3 for An. arabiensis and 0.68 for An. funestus Corrected biting rate outdoor = mosquito/household/trap × relative efficacy of BGM to HLC [54], i.e., 0.16 for An. arabiensis and 1.2 for An. funestus
  2. aSince farmers typically spend less than half a year in the farms, actual infection intensities would be less than half of these estimates