Which statement accurately defines the Breteau Index?

Which statement accurately defines the Breteau Index?

• A. House Index is the number of positive containers per 100 houses.
• B. Container Index is the number of houses examined.
• C. Breteau Index is the percentage of houses with at least one positive container.
• D. Breteau Index is the number of positive containers per 100 houses.

Answer: (D)

Breteau Index is a density measure of breeding sites. It counts how many positive containers exist for each 100 houses inspected, calculated as (positive containers ÷ houses inspected) × 100. This captures the total number of productive containers in the surveyed area, not just whether a house is infested. If some houses have multiple positive containers, the BI will be higher, reflecting greater breeding pressure. This is why the correct statement is that the Breteau Index is the number of positive containers per 100 houses.

Breteau Index is a density measure of breeding sites. It counts how many positive containers exist for each 100 houses inspected, calculated as (positive containers ÷ houses inspected) × 100. This captures the total number of productive containers in the surveyed area, not just whether a house is infested. If some houses have multiple positive containers, the BI will be higher, reflecting greater breeding pressure. This is why the correct statement is that the Breteau Index is the number of positive containers per 100 houses.