Table 1.
Container index of Aedes mosquitoes encountered at different study setups in Gampaha District, Sri Lanka
| Breeding habitat types | Container index | |||||||
|---|---|---|---|---|---|---|---|---|
| Aedes aegypti | Aedes albopictus | |||||||
| Urban | Suburban | Rural | Total | Urban | Suburban | Rural | Total | |
| Water storage barrels | 7.1 | 3.1 | 1.4 | 3.5 | 11.2 | 13.2 | 18.4 | 14.7 |
| Water storage cement tanks | – | 5.1 | – | 1.7 | 8.0 | 7.7 | 21.6 | 13.9 |
| Water storage other | 1.6 | 0.5 | – | 0.5 | 1.6 | 10.6 | 12.9 | 10.0 |
| Concrete slab | 2.9 | 14.6 | – | 5.4 | 20.0 | 4.2 | 15.4 | 12.8 |
| Gutters | – | – | – | – | 9.4 | 6.3 | 19.2 | 11.3 |
| Tyres | 14.0 | 8.8 | – | 6.6 | 14.0 | 31.6 | 31.7 | 27.9 |
| Ornamentals | 5.7 | 1.8 | 0.4 | 2.1 | 13.6 | 18.6 | 23.6 | 19.5 |
| Natural | 2.4 | – | – | 0.2 | 13.1 | 26.5 | 19 | 22.4 |
| Ponds | – | – | – | – | – | 25.0 | 12 | 6.5 |
| Wells | – | – | – | – | – | 2.9 | 3.3 | 1.0 |
| Tube wells | 5.0 | – | – | 3.9 | 16.8 | 11.1 | 18.5 | 16.8 |
| AC/refrigerator | 4.5 | 0.6 | – | 1.9 | 3.1 | 5.0 | 19 | 8.7 |
| Temporary removals | 6.8 | 0.5 | 0.6 | 2.5 | 8.6 | 20.1 | 19.9 | 16.5 |
| Covering items/polythene | 4.8 | 2.3 | – | 2.1 | 18.0 | 18.8 | 31.7 | 22.7 |
| Discarded degradable | 0.7 | – | – | 0.3 | 13.0 | 26.5 | 17.8 | 18.3 |
| Discarded reusable items | 9.8 | 0.4 | – | 1.9 | 14.1 | 25 | 14.5 | 19.3 |
| Discarded non-reusable items | 5.3 | – | – | 1.9 | 12.5 | 20.7 | 18.2 | 17.0 |
| Pet feeding cups | 2.6 | – | – | 1.1 | 4.5 | 11.3 | 17.0 | 9.1 |
| Non-used cisterns/commode | 14.3 | 5.9 | – | 6.0 | 14.3 | 40.8 | 32.1 | 36.8 |
| OtherA | – | – | – | – | 7.7 | 11.5 | 8.3 | 10.7 |
| Total | 4.2 (125/2948) | 1.3 (51/4033) | 0.2 (5/3051) | 1.8 (181/10032) | 9.5 (281/2948) | 19.4 (785/4033) | 20.0 (609/3051) | 16.7 (1675/10038) |
Container index was calculated as number of positive containers for Aedes spp./total number of water-holding containers inspected × 100
The bolded values indicate the highest CI observed for Aedes aegypti and Aedes albopictus at each environmental setup and overall CI for each species recorded from all environmental setup