A village with 5000 population reports 25 new malaria cases in one month. The Annual Parasite Index (API) for this village for the year (assuming same rate throughout) would be:
- A 6
- B 60 ✓
- C 30
- D 300
Correct answer: B. 60
Explanation
API = (Annual confirmed malaria cases / Mid-year population) × 1000. Annual cases = 25/month × 12 = 300. API = (300/5000) × 1000 = 60. An API >2 classifies an area as high-endemic; API 1–2 is moderate; API <1 is low. This village with API of 60 is highly endemic. Options A and B use monthly rather than annualised cases or incorrect denominators.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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