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Review Question - QID 212650

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QID 212650 (Type "212650" in App Search)
A 55-year-old obese man presents to the emergency department with abdominal pain. His pain started 2 days ago and has been worsening steadily. His only current medication is allopurinol. His temperature is 101.0°F (38.3°C), blood pressure is 157/98 mmHg, pulse is 120/min, respirations are 17/min, and oxygen saturation is 98% on room air. Physical exam is notable for left lower quadrant abdominal tenderness and rectal exam is unremarkable. A CT scan is performed demonstrating inflamed outpouchings of the colonic mucosa with a 4-cm abscess. Which of the following is appropriate treatment of this patient?