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Table 4 Breeding places and infestation levels with immature dengue vectors in clusters

From: Ecological, biological and social dimensions of dengue vector breeding in five urban settings of Latin America: a multi-country study

 

Mexico (n = 20)

Colombia (n = 20)

Ecuador (n = 20)

Brazil (n = 10)

Uruguay**** (n = 20)

Season

Dry

Wet

Dry

Wet

Dry

Wet

Dry

Wet

Dry

Wet

Private water containers per cluster

728

603

184

263

443

582

445

927

54

47

% outdoor containers

92.4

97.2

85.2

79.6

76.3

52.3

24.1

25.3

79.4

84.3

Number of Public containers per cluster

16

19

13

35

4

2

30

35

1

1

Most frequent container types*

Buckets, barrels, wash tanks

Wash tanks, barrels, buckets

Buckets, cans, wash tanks

Tires, barrels, buckets

Buckets, wash tanks

Container types most frequently with larvae**

Tank 1.6% Barrel 1.3%

Can 19.1% Tire 15.0%

Can 44.1% Small cont. 34.3%

Tire 54.1% Tank 27.5%

Tank 21.7 Flower vase 20.8%

Tire 39.6% Tank 27.9%

Tire 7.1% Small cont. 1.7%

Nat. Prod 16.7% Tire 8.3%

Pot 60% Small Cont. 7.7%

Pot 70.6% Tire 55.5%

Most productive container types (% of all pupae)***

Bucket 34.5% Barrel3 0.6% Tank 23.1%

Small used 25.4% Bucket 21.0% Barrel 18.1% Cans 14.2%

Tank 71.2% Barrel 24.1%

Tank 72.5% Barrel 8.9% Tire 6.1%

Tank 47.9% Bucket 22.6%

Tank 35.5% Tire 15.9% Small Cont. 13.9% Cans 9.4%

Small cont. 50.9% Barrel 29.1%

Barrel 36.4% Cans 32.5% Bucket 8.0%

Barrel 65.3% Cans 34.7%

Cans 29.9% Others used 15.4% Bucket 13.9% Barrel 12.1%

Number of pupae per cluster, rounded (with CIs)

13 (6–20)

83 (53–112)

465 (270–661)

390 (293–488)

146 (97–195)

576 (419–734)

6 (0.6- 10.4)

54 (25–82)

4 (0–7.6)

20 (8–32)

PPI (CIs)

0.03 (0.01- 0.05)

0.2 (0.14- 0.26)

1.24 (0.73- 1.75)

1.03 (0.81- 1.25)

0.37 (0.25- 0.49)

1.42 (1.02- 1.82)

0.01 (0.00- 0.03)

0.15 (0.07- 0.23)

0.01 (0.00- 0.03)

0.07 (0.03- 0.11)

PPH (CIs)

2.4 (1.24- 3.64)

18.1 (12.8- 23.4)

296.1 (82.8- 510.0)

213.3 (103–323.7

35.0 (12.7- 57.2)

150.2 (68.1- 232.3)

1.8 (0.27-3.37)

29.7 (9.1- 50.3)

0.32 (0.00- 0.66)

1.7 (0.76-2.61)

BI (CIs)

5.5 (3.5- 7.3)

29.2 (23.6- 34.8)

29.2 (24.5- 33.8)

39.8 (33.5- 46.0)

32.9 (28.0- 37.8)

57.9 (48.6- 67.2)

3.3 (1.7- 4.8)

9.6 (5.9- 13.3)

0.7 (0.27- 1.06)

6.2 (4.0-8.5)

  1. *The same water tanks in the dry and wet season, but rank order has changed in some cases.
  2. **% of infested containers (of specific type) from all containers of that type; “small containers” were all un-used . ***% of all pupae encountered **** Uruguay has an irregular distribution of rainfall during the year; dry season corresponds to November until first two weeks in December and wet season to April until the first two weeks of May.