Pneumonia Quiz: Ace Your Exams

Get ready to dominate your medical and nursing exams by using our dynamic quizzes to elevate your knowledge and increase your confidence. Whether you're gearing up for the USMLE®, COMLEX®, or your next in-class assessment, Osmosis quizzes tackle key topics in pathology, diagnostics, and treatment approaches. By honing in on clinical readiness and decision-making, we make sure the knowledge you gain empowers you both in the classroom and in real-world practice. Jump in and supercharge your exam prep!

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A 22-year-old woman comes to the office due to a week of low-grade fever, fatigue, headaches, and persistent non-productive cough. She was feeling healthy prior to symptom onset. Past medical history is noncontributory. She currently lives in a college dormitory. She does not use tobacco products, consume alcohol, or use illicit substances. Temperature is 38.0°C (100.4°F), pulse is 96/min, and blood pressure is 121/75 mmHg. Physical examination is notable for rhinorrhea and bilateral cervical lymphadenopathy. Chest radiograph reveals reticulonodular opacities and patchy consolidations in the lung fields. Laboratory findings reveal a mild anemia, and subsequent direct Coombs test and cold-agglutinin titers are found to be positive. Which of the following is the most likely cause of this patient’s condition?  

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