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.

0.0^a (52)

100^b (52)

100^b (53)

100^b (54)

100^b (53)

100^b (53)

Malanville

(Benin)

0.0^a (56)

100^b (63)

97^b (62)

100^b (61)

100^b (59)

89^c (64)

0.0^a (52)

100^b (55)

100^b (55)

100^b (50)

100^b (56)

100^b (54)

Pitoa

(Cameroon)

3.6^a (56)

100^b (63)

98^b (61)

100^b (65)

100^b (60)

81^c (63)

0.0^a (56)

100^b (55)

100^b (57)

100^b (59)

100^b (59)

100^b (58)

Vallée du Kou

(Burkina Faso)

0.0^a (62)

100^b (63)

98^b (59)

100^b (55)

100^b (54)

95^b (57)