This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
[{'content': 'A 24-year-old man presents with cellulitis two days after he is bitten by his cat. What is the most likely dominant organism involved in the infection? \nSelect and explain. \nA. Baonella henselae, B. Calymmatobacterium granulomatis, C. Pasteurella multocida, D. Toxoplasma gondii', 'role': 'user'}, {'content': "Answer: C \nExplanation: Pasteurella multocida is a dominant organism in the cat's mouth. Choice A, Baonella, is the causative agent of cat scratch fever and is less common in bites. Choice B, Calymmatobacterium, causes a sexually transmitted infection, and Toxoplasma (choice D) is associated with cats but transmitted by their faeces, not bites.", 'role': 'assistant'}]