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

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

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

ISSN: 1475-2875