Table 1.

PRs of C14-deltamethrin and comparable tarsal vs. topical application bioassays with deltamethrin on resistant (Res) and susceptible (Sus) An. gambiae

StrainInsecticide assay
PR, 10−3 (SD)Bioassay (95% confidence interval)
Ratio PRSuc/PRResTarsal LC50 × 10−4Topical LC50 × 10−4Resistance ratio Res/SusRatio tarsal/topical
TarsalTopical
Sus60 (±14)2.060.29 (0.22–0.38)0.4 (0.1–1.1)22.41 (20.9–23.4)12.25 (7.3–28.0)1.83
Res29 (±8)**6.5** (4.6–8.9)4.9** (2.8–8.0)
  • LC50, concentration resulting in the death of 50% of the test animals. n = 3 biological replicates; **P ≤ 0.05, Student’s t test.