During a dengue vector survey in a town, entomological teams record the number of water-holding containers positive for Aedes larvae out of every 100 houses inspected. Which entomological index does this describe, and at what level is epidemic transmission considered likely?
- A House index; greater than 50
- B Breteau index; greater than 5 ✓
- C Container index; greater than 20
- D Larval density index; greater than 100
Correct answer: B. Breteau index; greater than 5
Explanation
The Breteau index is the number of positive containers per 100 houses examined, and a value exceeding 5 is classically taken to indicate risk of epidemic dengue transmission. House index counts positive houses per 100 houses, and container index counts positive containers per 100 water-holding containers, so both definitions fail to match the stem. The larval density index is not the standard index used in this context.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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