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Table 3 Mean enzyme activities and enzyme ratios (ER) measured in An. stephensi populations from Afghanistan

From: Status of insecticide resistance and its biochemical and molecular mechanisms in Anopheles stephensi (Diptera: Culicidae) from Afghanistan

Enzyme

Population

Mean

ER

Alfa esterase

Susceptible

0.000517

1

Kunar

0.000983

1.90

Laghman

0.001050

2.03

Nangarhar

0.000917

1.77

Beta esterase

Susceptible

0.000567

1

Kunar

0.000961

1.69

Laghman

0.001075

1.89

Nangarhar

0.000904

1.59

GST

Susceptible

0.11445

1

Kunar

0.16204

1.41

Laghman

0.23021

2.01

Nangarhar

0.21822

1.90

cytochrome p450

Susceptible

0.0000491

1

Kunar

0.0001316

2.68

Laghman

0.0001167

2.37

Nangarhar

0.0001204

2.45

% AChE inhibition

Susceptible

68.63

1

Kunar

51.98

0.75

Laghman

48.82

0.71

Nangarhar

53.14

0.77

  1. ERs are the results of the mean enzyme activity or content of the field populations divided by those of the susceptible Beech population. %AChE inhibition is the percentage of acetylcholinesterase inhibition of the field populations compared with the susceptible Beech population