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Social & Preventive Medicine General bf4a61b8

A population of 100000 is under surveillance during an year. 100 cases were positive for malarial thick smear. What is the annual parasite index ?

A
1 per 1000
B
2 per 1000
C
10 per 1000
D
20 per 1000
High-Yield Explanation
Ans. is 'a' i.e.,1 per 1000 Annual Parasite Incidence =(confirmed cases during one year/population under surveillancee) x 1000Population under surveillance = 100000Confirmed cases = 100 100API - x 1000 = 1 100,000So, API is 1 per 1000 population.

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