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

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)

-

-