Pneumonia USMLE Step 1 Practice Question
A 28-year-old previously healthy woman presents with abrupt onset of fever, pleuritic chest pain, and a productive cough. She has no sick contacts. Chest X-ray shows a lobar consolidation in the right upper lobe with a positive blood culture growing gram-positive cocci in pairs. Which of the following is the most likely diagnosis?
Answer choices
- ALegionella pneumophila pneumonia
- BStreptococcus pneumoniae pneumoniaCorrect answer
- CChlamydia pneumoniae pneumonia
- DMycoplasma pneumoniae pneumonia
- EStaphylococcus aureus pneumonia
- FStreptococcus pyogenes pneumonia
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