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Table 4 Knockdown times of Ae. aegypt i and Ae. albopictu s exposed to 0.06% deltamethrin and 4% DDT

From: Insecticide susceptibility of Aedes aegypti and Aedes albopictus in Central Africa

Locality Ae. aegypti Ae. albopictus
  KdT 50
(95%CI); P*
KdT 95
(95%CI); P*
KdT 50
(95%CI); P*
KdT 95
(95%CI); P*
  Deltamethrin Deltamethrin
Garoua 5.3
(4.7-5.9); P = 0.47
11.4
(9.7-14.2); P = 0.24
- -
Bertoua 5.8
(3.3-8.2); P = 0.46
24.6
(16.6-51.4); P = 0.025
7.8
(7.3-8.3); P = 0.25
15.9
(14.4-18.0); P = 0.38
Yaoundé 6.7
(3.7-9.7); P = 0.35
22.8
(15.0-58.4); P = 0.05
11.2
(10.6-11.8); P = 0.06
17.3
(16.3-19.0); P = 0.28
Bafia 5.4
(3.3-7.4), P = 0.48
14.6
(10.1-36.9); P = 0.49
- -
Buea - - 11.7
(10.2-13.3); P = 0.06
21.2
(18.1-27.4); P = 0.09
Libreville 5.9
(5.1-6.8); P = 0.45
13.4
(11.2-17.9); P = 0.40
- -
Reference strain 5.5
(4.6-6.3)
14.5
(11.9-19.4)
- -
  DDT DDT
Garoua 53.6
(49.9-59.2)
101.9
(84.0-146.0)
- -
Bertoua - - 84.8
(72.8-106.9)
290.8
(200.7-523.0)
Yaoundé - - 77.4
(68.5-113.2)
109.2
(86.1-235.3)
Buea - - 68.0
(63.6-78.2)
93.9
(80.7-131.9)
Libreville 58.7
(55.8-62.7)
107.7
(94.6-129.2)
- -
  1. KdT: Knockdown times expressed in minutes; 95%CI: 95% confidence interval. *: P is the probability of homogeneity between the sample and the reference (Mantel-Haenszel chi square).