Which test is most specific for latent tuberculosis infection?

23.. A 55-year-old smoker presents with chronic cough and sputum production for 3 months in two consecutive years. What is the most likely diagnosis?

A 68-year-old man with COPD presents with hypoxemia and cyanosis. Long-term oxygen therapy is indicated when PaO2 is:

A benign, “stuck-on,” waxy lesion commonly seen in older adults is:

A patient with vesicular lesions on one side of the body following a dermatomal pattern most likely has:

Which test is most helpful to confirm tinea corporis?

74. A 40-year-old HIV-positive man with CD4 count 60/mm³ presents with fever and dry cough. Chest X-ray shows diffuse interstitial infiltrates. Most likely diagnosis?

Which of the following is the first-line regimen for active pulmonary TB?

Which of the following vaccines are recommended for COPD patients?

Which antibiotic regimen is recommended for outpatient community-acquired pneumonia in an otherwise healthy adult?