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Table 4 Phenotypes and genotypes at codon 1014 of the vgsc of Anopheles.gambiae collected in Ipono (December 2007).

From: Trends in DDT and pyrethroid resistance in Anopheles gambiaes.s. populations from urban and agro-industrial settings in southern Cameroon

Molecular form

Phenotype

Insecticide

N

Genotypes

f(Ser)

f(Phe)

    

Leu-Leu

Leu-Phe

Leu-Ser

Ser-Ser

Phe-Phe

Phe-Ser

  

M-form

Control

-

19

15

4

0

0

0

0

0

0.10

 

Dead

4%DDT

8

6

2

0

0

0

0

0

0.12

  

0.05%Deltamethrin

6

6

0

0

0

0

0

0

0

  

0.75%Permethrin

13

8

2

0

0

3

0

0

0.31

 

Survivor

4%DDT

0

-

-

-

-

-

-

-

-

  

0.05%Deltamethrin

0

-

-

-

-

-

-

-

-

  

0.75%Permethrin

0

-

-

-

-

-

-

-

-

S-form

Control

-

45

4

7

2

3

20

9

0.18

0.62

 

Dead

4%DDT

11

2

4

3

0

1

1

0.18

0.41

  

0.05%Deltamethrin

29

2

3

3

2

18

1

0.14

0.69

  

0.75%Permethrin

15

2

4

1

1

4

3

0.20

0.50

 

Survivor

4%DDT

29

0

1

0

0

27

1

0.01

0.96

  

0.05%Deltamethrin

6

0

0

0

0

3

3

0.25

0.75

  

0.75%Permethrin

33

0

0

0

0

24

9

0.14

0.86'

  1. N: sample size; f(): frequency of the resistant alleles (L1014S = Ser and L1014F = Phe) in the mosquito pools; vgsc: voltage gated sodium channel