Micro & Immunology · single question
The Mantoux test is used to detect which disease?
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Correct answer: A. Tuberculosis
- A. The Mantoux tuberculin skin test (TST) detects LATENT TUBERCULOSIS infection. PPD is injected intradermally; a positive reaction (induration ≥10-15mm depending on risk group) indicates prior sensitization to M. tuberculosis. Note: BCG vaccination can cause false positives.
- B. HIV is diagnosed by antibody tests (ELISA, Western blot) or PCR — not the Mantoux test.
- C. Hepatitis B is diagnosed with serological markers (HBsAg, anti-HBs, anti-HBc) — not the Mantoux test.
- D. Leprosy is diagnosed by skin biopsy/smear for acid-fast bacilli — not the Mantoux test.
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