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Table 1 Aedes larvae presence in different types of habitats

From: Aedes larval bionomics and implications for dengue control in the paradigmatic Jaffna peninsula, northern Sri Lanka

Type of habitat

Number of sampled habitats

Habitat salinity range (ppt salt)

Data for all Aedes species together

Data for each Aedes species separately

Ae. aegypti

Ae. albopictus

Ae. vittatus

No. of larvae collected

No. of positive habitats

HPR

No. of larvae collected

No. of positive habitats

HPR

No. of larvae collected

No. of positive habitats

HPR

No. of larvae collected

No. of positive habitats

HPR

Domestic wells

519

0–8

213

9

0.2

145

9

0.2

68

2

0.2

0

0

0.0

Open surface drains

194

0–3

390

35

2.3

390

35

2.5

0

0

0.0

0

0

0.0

Cement water storage tanks

235

0

383

14

0.8

144

11

0.7

162

7

1.2

77

2

2.0

Discarded plastic and paper cups

490

0

754

51

1.3

578

50

1.4

143

13

1.1

33

2

0.9

Discarded metal containers

338

0

83

6

0.2

83

6

0.2

0

0

0.0

0

0

0.0

Discarded plastic containers

515

0–5

1372

69

1.7

737

59

1.6

556

32

2.5

79

4

1.8

Discarded glass and ceramic containers

114

0

21

1

0.1

21

1

0.1

0

0

0.0

0

0

0.0

Discarded coconut shells

31

0

15

1

0.4

15

1

0.4

0

0

0.0

0

0

0.0

Flower pots and bases

40

0–8

149

6

1.9

60

4

1.4

63

3

3.0

26

1

5.8

Puddles

23

0

60

2

1.1

0

0

0.0

0

0

0.0

60

2

20.1

Discarded tires

44

0

279

8

2.3

108

7

2.2

171

7

6.3

0

0

0.0

Total (habitats or larvae)

2543

 

3719

202

 

2281

183

 

1163

64

 

275

11

 
  1. HPR, Habitat preference ratio; ppt, parts per thousand