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Table 3 Distribution of Aedes larvae and entomological indices

From: Incidence of dengue and chikungunya viruses in mosquitoes and human patients in border provinces of Vietnam

Province

No. of houses explored

No. of positive houses (%)

No. of containers explored

No. of positive containers (%)

Ae. aegypti larvae

Ae. albopictus larvae

Species ratio

Entomological indices

        

BIa

CIb

HIc

Ha Tinh

450

41 (8.1)

936

79 (8.4)

1406

551

0.65

17.56

8.44

8.12

Quang Tri

420

24 (4.9)

778

170 (21.9)

1147

423

0.73

40.48

21.85

4.82

Thua Thien Hue

480

40 (6.8)

730

202 (27.7)

1147

1022

0.53

42.08

27.67

6.77

Dac Nong

420

47 (9.2)

807

150 (18.6)

760

411

0.65

35.71

18.59

9.21

Long An

480

18 (3.0)

5128

984 (19.2)

5128

46

0.99

205

19.19

3.02

Total

2250

170 (7.5)

8549

1585 (18.9)

9588

2453

0.78

7.044

18.54

1.99

  1. aBI: Breteau Index = No. of positive containers / No. of houses explored × 100
  2. bCI: Container Index = No. of positive containers / No. of containers explored × 100
  3. cHI: House Index = No. of positive houses / No. of houses explored × 100