Table 1. Efficacy of deltamethrin-treated papers (0.05%) against adult An gambiae from Cove (wild) and Kisumu (laboratory susceptible) in WHO cylinder bioassays.

Strains	N exposed	% Knockdown (95% CI)	% Mortality (95% CI)
An gambiae Kisumu	102	98 (95–100)	100 (95–100)
An gambiae sl Cove (wild)*	104	11 (5–17)	8 (3–15)

*samples were collected as larvae from breeding sites close to the experimental huts in Cove during the trial