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Table 2 Residual activity (as determined by WHO cone bioassays on susceptible Kisumu strain) of unwashed and washed Permanet 2.0 and Permanet 3.0 in comparison with Conventionally Treated nets (CTN) washed to just before exhaustion in the three experimental hut stations.

From: Field efficacy of a new mosaic long-lasting mosquito net (PermaNet® 3.0) against pyrethroid-resistant malaria vectors: a multi centre study in Western and Central Africa

Country Conditions Untreated net Permanet 2.0 unwashed Permanet 2.0 20× washed Permanet 3.0 unwashed Permanet 3.0 20× washed CTN*
  Before washing 0.0a (52) 100b (52) 100b (53) 100b (54) 100b (53) 100b (53)
Malanville
(Benin)
After washing or
field testing
0.0a (56) 100b (63) 97b (62) 100b (61) 100b (59) 89c (64)
  Before washing 0.0a (52) 100b (55) 100b (55) 100b (50) 100b (56) 100b (54)
Pitoa
(Cameroon)
After washing or
field testing
3.6a (56) 100b (63) 98b (61) 100b (65) 100b (60) 81c (63)
  Before washing 0.0a (56) 100b (55) 100b (57) 100b (59) 100b (59) 100b (58)
Vallée du Kou
(Burkina Faso)
After washing or
field testing
0.0a (62) 100b (63) 98b (59) 100b (55) 100b (54) 95b (57)
  1. * Three washes were required to reach the point to just before exhaustion.
  2. Two Values in the same raw sharing same letter do not significantly differ (P > 0.05).
  3. Values in bold represent the number of tested mosquitoes per treatment.