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Table 4 Viruses isolated in mosquito females and minimum field infection rates by month, Barkedji area, 2012-2013

From: Arboviruses isolated from the Barkedji mosquito-based surveillance system, 2012-2013

Virus

 

July

September

October

November

December

Species

No

NP

P+

MFIR

No

NP

P+

MFIR

No

NP

P+

MFIR

No

NP

P+

MFIR

No

NP

P+

MFIR

WNV

Aedes dalzieli

367

52

0

0.0

108

46

0

0.0

7

6

1

142.9

0

0

0

0.0

0

0

0

0.0

Anopheles rufipes

1

1

0

0.0

33

9

0

0.0

61

10

1

16.4

8

6

0

0.0

8

6

0

0.0

Culex antennatus

46

15

0

0.0

176

77

0

0.0

990

71

2

2.0

96

35

1

10.4

0

0

0

0.0

Culex neavei

12

6

0

0.0

669

97

3

4.5

1193

78

6

5.0

1721

128

13

7.6

104

25

0

0.0

Culex perfuscus

155

16

1

6.5

222

64

0

0.0

64

21

0

0.0

0

0

0

0.0

0

0

0

0.0

Culex poicilipes

19

6

0

0.0

3168

149

0

0.0

2401

114

1

0.4

1974

113

0

0.0

4

4

0

0.0

Culex quinquefasciatus

4

2

1

250.0

13

6

0

0.0

23

3

0

0.0

20

5

0

0.0

20

5

0

0.0

Culex tritaeniorhynchus

842

48

0

0.0

98

40

0

0.0

343

47

1

2.9

14

12

0

0.0

0

0

0

0.0

Total vectors

1446

146

2

1.4

4487

488

3

0.7

5082

350

12

2.4

3833

299

14

3.7

136

40

0

0.0

USUV

Culex antennatus

46

15

0

0.0

176

77

0

0.0

990

71

1

1.0

96

35

1

10.4

0

0

0

0.0

Culex neavei

12

6

0

0.0

669

97

3

4.5

1193

78

2

1.7

1721

128

4

2.3

104

25

0

0.0

Total vectors

58

21

0

0.0

845

174

3

3.6

2183

149

3

1.4

1817

163

5

2.8

104

25

0

0.0

ACAV

Culex antennatus

46

15

0

0.0

176

77

0

0.0

990

71

0

0.0

96

35

1

10.4

0

0

0

0.0

Culex neavei

12

6

0

0.0

669

97

0

0.0

1193

78

1

0.8

1721

128

4

2.3

104

25

0

0.0

Mansonia africana

0

0

0

0.0

64

30

0

0.0

76

17

0

0.0

256

31

0

0.0

263

20

1

3.8

Total vectors

58

21

0

0.0

909

204

0

0.0

2259

166

1

0.5

2073

194

5

2.8

367

45

1

2.7

BAGV

Culex antennatus

46

15

0

0.0

176

77

0

0.0

990

71

1

1.0

96

35

0

0.0

0

0

0

0.0

Culex neavei

12

6

0

0.0

669

97

0

0.0

1193

78

0

0.0

1721

128

2

1.2

104

25

0

0.0

Total vectors

58

21

0

0.0

845

 

0

0.0

2183

149

1

0.5

1817

163

2

1.1

104

25

0

0.0

BARV

Aedes sudanensis

15

8

0

0.0

517

103

1

1.9

111

36

0

0.0

2

2

0

0.0

0

0

0

0.0

Culex neavei

12

6

0

0.0

669

97

2

3.0

1193

78

4

3.4

1721

128

10

5.8

104

25

0

0.0

Total vectors

27

14

0

0.0

1186

200

3

2.5

1304

114

4

0.0

1723

130

10

0.0

104

25

0

0.0

NDUV

Aedes dalzieli

367

52

0

0.0

108

46

0

0.0

7

6

1

142.9

0

0

0

0.0

0

0

0

0.0

Aedes vexans

6603

187

0

0.0

1408

102

0

0.0

278

44

1

3.6

4

4

0

0.0

0

0

0

0.0

Anopheles rufipes

1

1

0

0.0

33

9

0

0.0

61

10

1

16.4

8

6

0

0.0

8

6

0

0.0

Anopheles ziemanni

6

6

0

0.0

1879

129

1

0.5

434

44

0

0.0

62

33

0

0.0

10

8

0

0.0

Culex antennatus

46

15

0

0.0

176

77

0

0.0

990

71

0

0.0

96

35

0

0.0

0

0

0

0.0

Culex poicilipes

19

6

0

0.0

3168

149

0

0.0

2401

114

1

0.4

1974

113

0

0.0

4

4

0

0.0

Mansonia uniformis

0

0

0

0.0

2277

142

3

1.3

864

70

0

0.0

127

30

0

0.0

2

2

0

0.0

Total vectors

7042

267

0

0.0

9049

654

4

0.4

5035

359

4

1.0

2271

221

0

0.0

24

20

0

0.0

SANV

Culex antennatus

46

15

0

0.0

176

77

0

0.0

990

71

0

0.0

96

35

1

10.4

0

0

0

0.0

Culex neavei

12

6

0

0.0

669

97

0

0.0

1193

78

0

0.0

1721

128

4

2.3

104

25

0

0.0

Mansonia africana

0

0

0

0.0

64

30

0

0.0

76

17

0

0.0

256

31

0

0.0

263

20

1

3.8

 

Total vectors

58

21

0

0.0

909

204

0

0.0

2259

166

0

0.0

2073

194

5

2.8

367

45

1

2.7

SINV

Culex antennatus

46

15

0

0.0

176

77

0

0.0

990

71

0

0.0

96

35

1

10.4

0

0

0

0.0

Culex neavei

12

6

0

0.0

669

97

1

1.5

1193

78

5

4.2

1721

128

6

3.5

104

25

0

0.0

Total vectors

58

21

0

0.0

845

174

1

1.2

2183

149

5

2.3

1817

163

7

3.9

104

25

0

0.0

RVFV

Aedes ochraceus

83

17

0

0.0

1250

110

1

0.8

516

53

0

0.0

5

4

0

0.0

0

0

0

0.0

YAOV

Culex tritaeniorhynchus

842

48

1

1.2

98

40

0

0.0

343

47

0

0.0

14

12

0

0.0

0

0

0

0.0

  1. No: Number of female mosquitoes collected; NP: Number of pools; P+: number of positive pools; MFIR: minimum field infection rate (total number positive pools / the total number of mosquitoes tested *1000)