Which diagnostic test would confirm a diagnosis of tuberculosis?
  1. Bronchoscopy
  2. Chest x-ray
  3. Sputum culture
  4. Tuberculin skin test
Explanation
Answer: C - A sputum culture would confirm the diagnosis of tuberculosis. The culture would isolate the bacterium, Mycobacterium tuberculosis. A tuberculin skin test leads to a presumptive diagnosis. A chest x-ray would show evidence of graunulomatous disease.
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