Bacteriology
Sample questions
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A 35-year-old man presents with cough, dyspnea, and progressive shortness of breath. He has bilateral interstitial infiltrates on CXR and serum cold agglutinins. Routine sputum Gram stain shows no organisms. Mycoplasma serology is negative. He recently spent extensive time in caves with bats. The organism most likely belongs to which category?
A patient on long-term penicillin G develops worsening fever, chills, hypotension, headache, and myalgia within 2 hours of receiving the first dose of antibiotic for syphilis. The reaction is:
A 7-year-old has 2 weeks of low-grade fever, dry cough, and headache. CXR: bilateral patchy infiltrates. He owns a pet parakeet that died last week of 'a cold.' Serology positive for an obligate intracellular gram-negative organism. The most likely organism is:
FAQ
What's covered in the Bacteriology topic?
Bacteriology covers high-yield mechanisms, clinical presentations, diagnostic workup, and management — drawn from First Aid, Pathoma, and the NBME content outline.
How many practice questions does Bacteriology have?
100 board-style multiple-choice questions and 0 spaced-repetition flashcards. Sign up free to drill them with adaptive difficulty and a Socratic AI tutor that explains every wrong answer.
Is Bacteriology on USMLE Step 1 or Step 2 CK?
Bacteriology appears on both Step 1 (foundational mechanisms) and Step 2 CK (clinical decision-making). Our questions are tagged by exam target so you can filter to just the Step you're studying.
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