This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Which of the following causes highest risk of nosocomial infection to a patient - \nSelect and explain. \nA. Patient admitted for elective surgery, B. HIV patient coming in follow up OPD, C. Patient undergoing endoscopy, D. Patient admitted for normal delivery', 'role': 'user'}, {'content': "Answer: A \nExplanation: Most common nosocomial infection → Urinary tract infection.\n\nMost of the nosocomial UTIs occur after urinary catheterization.\n\nSecond most common nosocomial infection → Pneumonia.\n\nMost of the nosocomial pneumonia are acquire through respiratory intubation, mechanical ventilation and suction of the material from the mouth.\n\nNext most common cause of nosocomial infection →\xa0Surgical procedures.\n\nSurgical procedures increase a patient's risk of getting an infection in the hospital. Surgery directly\xa0invades the patient's body giving bacteria a way into normally sterile parts of the body.\nAn infection may be acquired from contaminated surgical equipment or from health-care workers. Following surgery, the surgical wound can become infected.", 'role': 'assistant'}]