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Table 1 The estimated malaria transmission intensity attributable to the Anopheles gambiae complex and Anopheles funestu s, computed for each village separately and the 2008 overall average

From: Impact of promoting longer-lasting insecticide treatment of bed nets upon malaria transmission in a rural Tanzanian setting with pre-existing high coverage of untreated nets

Species Idete Namawala Overall
Sporozoite prevalence (S; %)   
   A. gambiae complex 0.22 0.33 0.32
No. tested by ELISA 1,858 3,148 5,006
   A. funestus 2.13 <0.09 1.71
No. tested by ELISA 422 105 527
Biting rate (B; b/p/n)   
   A. gambiae complex 33.51 89.66 60.90
   A. funestus 2.40 1.05 1.74
   No. of trap nights 916 732 1,648
Entomological inoculation rate (EIR; ib/p/y)  
   A. gambiae complex 26.3 124.8 71.1
   A. funestus 18.7 0.3 10.8
   Total 45.0 125.1 81.9
Proportion parous    
   A. gambiae complex 0.45 0.54 0.51
   No. dissected 353 736 1,089
A. gambiae complex sibling species proportion  
   A. arabiensis 0.87 0.84 0.86
   A. gambiae 0.12 0.15 0.14
   No. PCR amplifications 1,481 2,599 4,080
Bed net usage (%) a    
   Untreated 41.0 47.3 44.8
   Treated 47.0 46.6 46.8
   Overall 87.9 94.0 91.5
   No. of bed net users 4,112 6,551 10,663
  1. S = no. of sporozoite positive mosquitoes/no. of mosquitoes tested
  2. B = no. of mosquitoes collected/no. of trap nights/calibration factor of 0.30 for A. gambiae complex and 0.68 for A. funestus; and EIR = S × B × 365
  3. a Calculated as the percentage of people who slept under a bed net the previous night; bed nets were considered to be treated if insecticide had been applied in the previous 12 months