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Table 6 Enzyme activity observed in Aedes aegypti from three insecticide resistant populations and the Rockefeller strain.

From: Insecticide resistance in Aedes aegypti populations from Ceará, Brazil

  α-esterase
(nmol/mg ptn/min)
β-esterase
(nmol/mg ptn/min)
Esterases-PNPA
(Δabs/mg ptn/min)
Populations/enzyme activity N Median 99 th Percentile N Median 99 th Percentile N Median 99 th Percentile
Rockefeller 104 40.87 65.87 112 71.46 98.83 119 2.96 5.33
Populations/enzyme activity N Median (% > p99) N Median (% > p99) N Median (% > p99)
Crato 51 64.58 43.0 51 59.42 0 51 3.57 0
Barbalha 108 70.03 57.0 116 73.12 13.0 119 5.11 41.0
Juazeiro do Norte1 108 63.67 45.0 89 74.72 7.0 108 4.83 39.0
Populations/enzyme activity Acetylcholinesterase (ACE)
(% act) a
Glutathione S-transferase (GST)
(mmol/mg ptn/min)
Mixed function oxidases (MFO)
(nmol/mg ptn/min)
  N Median 99 th Percentile N Median 99 th Percentile N Median 99 th Percentile
Rockefeller 131 26.06 34.76 114 0.70 1.97 113 24.85 47.35
Populations/enzyme activity N Median (% > p99) N Median (% > p99) N Median (% > p99)
Crato 65 25.30 6.0 51 1.39 18.0 50 16.23 0
Barbalha 113 24.17 3.0 116 1.90 42.0 101 22.54 0
Juazeiro do Norte1 109 28.90 5.0 98 1.89 42.0 92 15.32 2.0
  1. N = number of females; % > p99: rate of the population with activity higher than the Rockefeller; (% > p99) < 15: unaltered enzyme activity; (% > p99) > 15 < 50 altered enzymatic activity; (% > p99) > 50: highly altered; a rate of activity in the presence of propoxur; 1 population with reduced susceptibility to cypermethrin.