Skip to main content

Table 6 Entomological indices of malaria vectors at the three time points in the two villages

From: Differential contribution of Anopheles coustani and Anopheles arabiensis to the transmission of Plasmodium falciparum and Plasmodium vivax in two neighbouring villages of Madagascar

Species

Ambohitromby

Miarinarivo

Time point

HBR

n

(+)

SR (%)

EIR

Time point

HBR

n

(+)

SR (%)

EIR

Anopheles coustani

T1

6.25

68

0

0

0

T1

5.50

65

0

0

0

T2

3.50

25

2

8.00

0.28

T2

8.08

95

5

5.26

0.43

T3

13.50

159

0

0

0

T3

25.75

297

7

2.36

0.61

Total

7.75

252

2

0.40

0.03

Total

13.11

457

12

2.63

0.34

Anopheles arabiensis

T1

5.33

58

3

5.08

0.27

T1

1.33

16

0

0

0

T2

17.25

166

3

1.78

0.31

T2

6.75

81

3

3.70

0.25

T3

0.83

10

0

0

0

T3

2.67

32

0

0

0

Total

7.81

234

6

2.52

0.20

Total

3.58

129

3

2.34

0.08

Anopheles funestus

T1

2.83

35

1

2.86

0.08

T1

0.75

14

0

0

0

T2

2.17

28

0

0

0

T2

1.17

16

1

6.25

0.07

T3

3.33

42

0

0

0

T3

4.92

77

1

1.30

0.06

Total

2.78

105

1

0.95

0.03

Total

2.38

107

2

1.87

0.04

All 3 species

T1

14.42

163

4

2.45

0.35

T1

7.58

94

0

0

0

T2

22.92

222

5

2.25

0.52

T2

16.00

192

9

4.69

0.75

T3

17.67

215

0

0

0

T3

33.33

406

8

1.97

0.66

Total

18.33

600

9

1.50

0.27

Total

18.97

692

17

2.46

0.47

  1. Abbreviations: HBR, human-biting rate (the number of collected mosquitoes per number of human-night (12 at each time point in each village)). The HBR is expressed in bite/human/night (b/h/n); n, the number of anopheline mosquitoes collected by HLCs and analysed by real time PCR. The DNA was extracted from individual head-thorax; (+) corresponds to the number of Plasmodium positive samples confirmed by the TaqMan 18S; SR, sporozoite rate (the number of positive samples divided by the number of analysed samples (n), in %); EIR, entomological inoculation rate (EIR = HBR × SR). It is expressed as infective bite/human/night (ib/h/n)