The Stegomyia (Aedes) index used to assess dengue transmission risk is calculated as:
- A Breteau Index = (Positive containers / 100 houses inspected) ✓
- B House Index = (Houses with Aedes larvae / Houses inspected) × 100
- C Container Index = (Adult Aedes caught per hour / Containers inspected) × 100
- D Larvae Index = (Larvae per square meter of water body) × 100
Correct answer: A. Breteau Index = (Positive containers / 100 houses inspected)
Explanation
The Breteau Index (BI) = Number of positive containers per 100 houses inspected — it is the most informative Stegomyia index as it relates larval density to the housing unit. The House Index (HI) = % houses with Aedes larvae; Container Index (CI) = % containers positive for larvae. A Breteau Index >50 indicates high transmission risk and mandates urgent vector control. WHO recommends BI <5 to prevent dengue transmission.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.