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Table 2 Container types, positivity, productivity and BPR for immature Ae. aegypti mosquitoes

From: Probable contribution of Culex quinquefasciatus mosquitoes to the circulation of chikungunya virus during an outbreak in Mombasa County, Kenya, 2017–2018

Container type

No. of containers sampled (%)

No. of positive containers (%)

Container productivity (%)

Mean container productivity

Breeding preference ratio

Basins

41 (2.50)

5 (3.91)

43 (8.1)

1.05

1.56

Drumsa

249 (15.19)

84 (65.63)

317 (60)

1.3

4.31

Jerry cans

1232 (75.17)

19 (14.84)

74 (14)

0.06

0.20

Buckets

96 (5.86)

7 (5.47)

3 (0.5)

0.03

0.93

Tanksb

10 (0.61)

4 (3.13)

62 (11.7)

6.2

5.13

Clay pots

2 (0.12)

1 (0.78)

1 (0.2)

0.5

6.50

Tires

9 (0.55)

8 (6.25)

28 (5.3)

3.1

11.36

Total

1639 (100)

128 (7.81)

528 (100)

  
  1. Breeding preference ratio (BPR) = percentage of positive containers divided by the percentage of containers sampled
  2. aMetal and plastic (50 ≤ 200 l)
  3. bUnderground, metal, plastic and concrete (500–2000 l)