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East Asia Government Practice Test & Exam Prep

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A 48-year-old male with a history of IV drug use presents with high fever, chills, night sweats, and progressive fatigue for 3 weeks. On physical examination, temperature is 39.1°C, and a new 3/6 holosystolic murmur is heard at the lower left sternal border that increases in intensity with inspiration (Carvallo sign). Transthoracic echocardiography reveals a 12 mm mobile vegetation on the tricuspid valve. What is the most common causative organism?
Correct Answer:
Staphylococcus aureus

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