MKSAP 19 "Quiz Me!" Question

MKSAP 19MKSAP has been trusted by internists since 1967 as the best resource for updating knowledge. MKSAP 19, available in Complete, Digital, and Print packages, consists of 11 comprehensive text chapters with related multiple-choice questions. You'll find 1,200 completely new questions to help you identify learning gaps, stay current, and gain the knowledge you need to provide the best possible patient care. MKSAP 19's original and high-quality questions evolve out of case studies and patient scenarios based on the latest evidence.

For more information on MKSAP 19, or to order your copy, visit

MKSAP 19 Q & A

A 72-year-old man is hospitalized for dyspnea, night sweats, and productive cough; symptoms began 8 months ago. He also reports a 9.1-kg (20 lb) weight loss over the past 12 months. Medical history is notable for COPD. He has a 60-pack-year smoking history. Medications are umeclidinium and vilanterol inhaler once daily.

On physical examination, vital signs are normal. Pulmonary examination reveals diminished breath sounds. The remainder of the examination is normal.

Sputum Gram stain shows abundant polymorphonuclear cells but no organisms. Sputum acid-fast bacilli stains are positive. Nucleic acid amplification testing for Mycobacterium tuberculosis is negative.

A chest radiograph is shown.

Which of the following is the most likely causative organism?

A: Mycobacterium avium complex
B: Mycobacterium marinum
C: Mycobacterium tuberculosis
D: Streptococcus pneumoniae

Answer and Critique

Back to the February 2023 issue of ACP IMpact