Evaluation of Polyethylene-Based Long Lasting Treated Bed Net Netprotect on Anopheles Mosquitoes, Malaria Incidence, and Net Longivity in Western Kenya

Table 4

Chemical analysis of bed nets collected after 2 and 3 years of use.

After months of use	No. of samples analyzed	Deltamethrin ± Std Dev (g/kg)	R-isomer (g/kg)	Median deltamethrin (g/kg)
0	4	1.90 ± 0.02
9	5*	1.17 ± 0.22	0.21 ± 0.02	1.16
24	22	0.73 ± 0.53	0.30 ± 0.22	0.74
36	31	0.49 ± 0.48	0.48 ± 0.23	0.36

The 5 samples represented 3 with high bioassay efficacy and 2 with low.