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Table 1 Knockdown times (KDT) and mortality rates of An. gambiae s.l. populations exposed to 0.05% deltamethrin

From: Insecticide resistance in Anopheles gambiae from south-western Chad, Central Africa

District Village N Mortality
(%)
% KD after
1 h exposure
KDT50 in min
(95% CI)
KDT95 in min
(95% CI)
KDT50R*
Bongor Bongor 91 72.5(3) 93.4 27.5 (26.0–29.0) 72.5 (65.7–81.7) 1.70
  Goulmoun 85 72.9(3) 100 17.1 (16.1–18.1) 34.4 (32.0–37.5) 1.05
  Tchinfogo 94 70.2(3) 100 15.5 (14.7–16.3) 27.4 (25.6–29.7) 0.96
Guelendeng Guelendeng 91 98.9(1) 100 13.4 (12.5–14.3) 29.0 (26.8–31.8) 0.83
  Mbéré 89 86.5(2) 100 11.2 (9.9–12.4) 20.4 (18.0–24.5) 0.69
  Witi-Witi 89 96.6(2) 100 9.5 (8.7–10.2) 20.3 (18.5–22.7) 0.59
Kélo Kélo 100 88.0(2) 98.0 12.8 (11.8–13.7) 35.2 (32.3–38.9) 0.79
  Bologo 87 85,1(2) 96.6 25.2 (24.0–26.4) 50.6 (47.3–54.8) 1.56
  Kolon 99 74.8(3) 100 21.3 (20.4–22.2) 36.3 (34.3–38.7) 1.31
Kisumu Susceptible strain   82 100(1) 100 16.2 (14.6–17.7) 29.9 (26.7–34.9)  
  1. * KDT50R: KDT50 of the tested population divided by KDT50 of the Kisumu reference strain (1): susceptible; (2): resistance suspected; (3): resistant (WHO, 1998)