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Table 4 Knockdown and mortality rates of An.gambiae exposed on nets repeatedly washed using WHO procedure and two local washing methods; hand rubbing and beating on rocks

From: Wash durability and optimal drying regimen of four brands of long-lasting insecticide-treated nets after repeated washing under tropical conditions

Net type Machine wash Hand wash Washing on Rocks
Conventional % Knockdown % Mortality % Knockdown % Mortality % Knockdown % Mortality
Unwashed 100 97 100 97 100 97
5X 35 30 40 41 30 28
10X 35 20 35 18 20 15
15X 15 14 10 6 7 4
20X 13 12 4 1 2 0
Olyset       
Unwashed 100 100 100 100 100 100
5X 30 45 45 50 27 34
10X 20 20 23 23 15 8
15X 15 10 11 18 11 2
20X 8 10 6 6 3 1
PermaNet       
Unwashed 100 100 100 100 100 100
5X 95 93 82 94 91 75
10X 91 90 82 87 85 68
15X 85 86 75 79 50 50
20X 68 70 50 72 46 44
BASF       
Unwashed 100 100 100 100 100 100
5X 91 93 86 90 89 82
10X 85 85 86 72 78 61
15X 65 70 46 69 26 20
20X 50 60 38 43 22 13
TNT       
Unwashed 100 100 100 100 100 100
5X 85 86 83 83 55 60
10X 78 80 76 57 38 9
15X 55 61 72 26 21 6
20X 15 30 14 17 7 4