This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infection, Subject name: Medicine
[{'content': 'All are useful for management of severe clostridium difficile treatment except: \nSelect and explain. \nA. Intravenous Metronidazole, B. Neomycin enema, C. Fecal transplant, D. Tigecycline', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Treatment of CDI: Initial episode Oral vancomycin orFidaxomicin Fulminant CDI Vancomycin plusmetronidazole IV plus considerRectal instillation of vancomycin Consider using IV tigecycline in place of metronidazole Multiple recurrences Vancomycin; orFidaxomicin orFecal microbiota transplantation (FMT)', 'role': 'assistant'}]