Skip to main content

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.