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Table 5 Distribution of Kdr genotypes in An. gambiae populations from Douala and Yaoundé according to the category of breeding habitat and level of susceptibility to insecticides

From: Anopheles gambiae distribution and insecticide resistance in the cities of Douala and Yaoundé (Cameroon): influence of urban agriculture and pollution

Parameters

Douala

 

Yaoundé

 

All

RR

RS

SS

F(Kdr)

P(HW)

RR

RS

SS

F(Kdr)

P(HW)

N

F (Kdr)

Breeding sites

            

   Polluted

35

44

22

0.56

0.31

10

36

39

0.33

0.81

186

0.45

   Non polluted

101

95

33

0.65

0.26

50

85

73

0.44

0.01

437

0.55

   Cultivated

92

31

7

0.83

0.06

19

5

2

0.83

0.13

156

0.83

Insecticides

            

DDT 4%

            

   Deaths

2

7

6

0.37

-

2

5

30

0.12

-

52

0.19

   Survivors

27

29

8

0.65

-

9

23

8

0.51

-

104

0.59

Permethrin 0.75%

            

   Deaths

48

68

24

0.58

-

2

25

23

0.29

-

190

0.51

   Survivors

85

16

4

0.88

-

17

10

4

0.71

-

136

0.84

Deltamethrin 0.05%

            

   Deaths

37

34

13

0.64

-

29

30

18

0.57

-

161

0.61

   Survivors

21

9

5

0.73

-

8

9

5

0.56

-

57

0.67

  1. S, wild type; R, 1014F; RS, heterozygote; RR, homozygote resistant; P(HW), goodness of fit to Hardy Weinberg Equilibrium (significant if P < 0.05); F(kdr), frequency of the Kdr allele.