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Table 3 Relationship between the ace-1 mutant gene and insecticide resistance in An. sinensis

From: Insecticide resistance of Anopheles sinensis after elimination of malaria in Henan Province, China

Sampling sites/populations

Insecticides

Statusa

Sample size (n)

ace-1 genotype (n)b

Allelic gene frequency

Odds ratio (95% CI) G119S

G/G

S/S

G/S

G119G, n (%)

G119S, n (%)

Pingqiao

Propoxur

CR

18

4

4

10

18 (50.00)

18 (50.00)

0.52 (0.23, 1.20)

S

32

0

10

22

22 (34.38)

42 (65.63)

Malathion

CR

2

0

1

1

1 (25.00)

3 (75.00)

4.75(0.47, 48.34)

S

31

7

0

24

38 (61.29)

24 (38.71)

Total

–

83

11

15

57

79 (47.59)

87 (52.41)

–

Tanghe

Propoxur

CR

7

0

1

6

6 (42.86)

8 (57.14)

17.33* (2.91, 103.38)

S

14

12

0

2

26 (92.86)

2 (7.14)

Malathion

CR

1

0

0

1

1 (50.00)

1 (50.00)

37.00* (1.22, 1119.83)

S

19

18

0

1

37 (97.37)

1 (2.63)

Total

–

41

30

1

10

70 (85.37)

12 (14.63)

–

Xiangcheng

Propoxur

CR

33

29

0

4

62 (93.94)

4 (6.06)

3.81(0.41, 35.05)

S

30

29

0

1

59 (98.33)

1 (1.67)

Malathion

CR

1

0

0

1

1 (50.00)

1 (50.00)

20.33(1.00, 410.20)

S

32

29

0

3

61 (95.31)

3 (4.69)

Total

–

96

87

0

9

183 (95.31)

9 (4.69)

–

Xiangfu

Propoxur

CR

32

0

4

28

28 (43.75)

36 (56.25)

1.50(0.60, 3.75)

S

13

1

0

12

14 (53.85)

12 (46.15)

Malathion

CR

18

0

5

13

13 (36.11)

23 (63.89)

1.66 (0.72, 3.84)

S

32

2

3

27

31 (48.44)

33 (51.56)

Total

–

95

3

12

80

86 (45.26)

104 (54.74)

–

Total

–

–

315

131

28

156

418 (66.35)

212 (33.65)

–

  1. ace-1 Acetylcholinesterase-1 gene
  2. *P < 0.05
  3. aCR, Confirmed resistance (mortality < 90%); PR, possible resistance (90% ≤ mortality ≤ 97%); S, susceptible (mortality ≥ 98%)
  4. bG/G refers to the wild-type ace-1 genotype (GGC), S/S refers to the homozygous ace-1 mutation (AGC), G/S is heterozygote for ace-1(GGC/AGC)