Table 4.
Breeding places and infestation levels with immature dengue vectors in clusters
| |
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) |
*The same water tanks in the dry and wet season, but rank order has changed in some cases.
**% 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.