In the pupal productivity survey, 2,024 houses were surveyed and 2,969 water-holding containers were inspected. Discarded small water containers most frequently contained immature Ae. aegypti. The most pupal-productive containers were elevated water tanks, roof gutters and water holding roofs. Combined, these three containers accounted for<40% of all positive containers but produced>70% of all pupae. In the two districts where the pupal productivity survey was conducted, the house indices were 5.1 and 4