Mycobacterium tuberculosis transmission to close contacts is most accurately quantified by which index in epidemiological surveillance?
- A Case Notification Rate
- B Cure rate
- C Annual Risk of Tuberculosis Infection (ARTI) ✓
- D Treatment success rate
Correct answer: C. Annual Risk of Tuberculosis Infection (ARTI)
Explanation
Annual Risk of Tuberculosis Infection (ARTI) measures the probability of a person being newly infected with M. tuberculosis in one year, assessed by tuberculin skin testing. It is the most sensitive indicator of TB transmission in a community and reflects the force of infection. An ARTI of 1% means 1% of the population gets newly infected each year. India's ARTI has declined significantly under NTEP.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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