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Review Question - QID 212757

In scope icon M 6 B
QID 212757 (Type "212757" in App Search)
A 25-year-old man presents to the emergency department for a fever and abdominal pain. The patient states that his pain has been worsening over the past week in the setting of a fever. He has a past medical history of IV drug abuse and multiple admissions for septic shock. His temperature is 102°F (38.9°C), blood pressure is 94/54 mmHg, pulse is 133/min, respirations are 22/min, and oxygen saturation is 100% on room air. Physical exam is notable for a murmur over the left upper sternal border. Abdominal exam reveals left upper quadrant tenderness. Laboratory values are ordered as seen below.

Hemoglobin: 15 g/dL
Hematocrit: 44%
Leukocyte count: 16,700/mm^3
Platelet count: 299,000/mm^3

Which of the following is the most likely diagnosis?