Bioefficacy and durability of Olyset® Plus, a permethrin and piperonyl butoxide-treated insecticidal net in a 3-year long trial in Kenya

Table 5 Mean permethrin and PBO contents (relative standard deviation) in nets at baseline, and at 12, 24 and 36 months

Sampling month	Olyset^® Plus				Olyset^® Net
Sampling month	Mean permethrin content in g/kg (95% CI)	Permethrin content lost (%)	PBO content in g/kg (95% CI)	PBO content lost (%)	Mean permethrin content in g/kg (95% CI)	Permethrin content lost (%)
0	18.4 (18.3–18.6)^a	–	8.98 (8.86–9.10)	–	19.6 (19.5–19.7)^b	–
12	11.7 (10.6–12.7)	36	3.01 (2.30–3.80)	66	16.5 (16.0–17.0)	16
24	11.1 (10.2–12.0)	40	1.70 (1.20–2.20)	81	15.9 (15.1–16.7)	19
36	8.8 (7.9–9.7)	52	1.16 (0.8–1.5)	87	14.8 (13.9–15.7)	24

^aWithin net variation (relative standard deviation) in permethrin and PBO contents at baseline was 2.2% and 3.7%, respectively (Olyset^® Plus). – not applicable, PBO piperonyl butoxide
^bWithin net variation (relative standard deviation) in permethrin content at baseline was 1.2% (Olyset^® Net)

ISSN: 2049-9957