This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Preoperative assessment and monitoring in anaesthesia, Subject name: Anaesthesia
[{'content': 'On postoperative day 5, an otherwise healthy 55-year-old man recovering from a paial hepatectomy is noted to have a fever of 38.6degC (101.5degF). Which of the following is the most common nosocomial infection postoperatively? \nSelect and explain. \nA. Wound infection, B. Pneumonia, C. Urinary tract infection, D. Intra-abdominal abscess', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The most common nosocomial infection is a urinary tract infection. Treatment consists of removal of an indwelling catheter as soon as possible and antibiotic therapy for cultures with greater than 100,000 CFU/mL. Pneumonias, wound infections, intra-abdominal abscesses, and catheter-related bloodstream infections are also all causes of nosocomial infections, and a workup of a postoperative fever should also include careful examination of the patient and other diagnostic tests as appropriate (chest x-ray, blood cultures, abdominal/pelvic CT scan).', 'role': 'assistant'}]