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Table 3 Gravidity rate of Anopheles gambiae s.l. observed before and after IRS and LLIN intervention in districts of Adjohoun, Dangbo, Misserete and Seme

From: Decreased proportions of indoor feeding and endophily in Anopheles gambiae s.l. populations following the indoor residual spraying and insecticide-treated net interventions in Benin (West Africa)

Districts

Before intervention (May-July 2008)

After intervention (May-July 2009)

 

Number of females caught

Number of gravid mosquitoes

Gravidity rate

Number of females caught

Number of gravid mosquitoes

Gravidity rate

   

Mean

Confidence interval

  

Mean

Confidence interval

IRS arm

        

Adjohoun

84

26

30.16a

[21.31-41.98]

32

0

0b

[0.00-10.91]

Dangbo

84

31

36a

[26.63-48.13]

48

0

0b

[0.00-7.42]

Misserete 1

84

29

33.66a

[24.48-45.70]

5

0

0b

[0.00-52.20]

Misserete 2

288

120

41.16a

[35.91-47.60]

4

0

0b

[0.00-60.25]

Seme

388

142

36.16a

[31.79-41.61]

0

-

-

-

Akron Control

88

35

41a

[29.49-50.77]

132

53

40a

[31.72-49.04]

LLITN arm

        

Adjohoun

91

41

44.33a

[34.60-55.85]

72

22

30.55b

[20.24-42.53]

Dangbo

82

38

46.66a

[35.25-57.70]

100

35

35b

[25.73-45.19]

Seme

90

35

38.66a

[28.79-49.75]

216

101

48.33a

[39.96-53.65]

Akron Control

404

176

42.33a

[38.67-48.56]

384

133

36.33a

[29.88-39.63]

  1. For the mean of each district, values of the same line which carry same letters in exposant were not significantly different (p > 0.05).