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: Unknown
[{'content': 'A veterinary doctor had fever for 15 days. His blood culture in special laboratory media was positive for Gram-negative short bacilli which was oxidase positive. Which one of the following is the likely organism grown in culture? \nSelect and explain. \nA. Pasteurella spp., B. Francisella spp., C. Bartonella spp., D. Brucella spp.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: • Pastuerella sp-Gram —ve bacilli oxidase +ve causes cellulitis but no fever\n• Francicella sp-Gram —ve short bacillis, oxidase +ve, causes\n• Tularemia arthrosis but no PUD\n• Bartonella — Gram —ve red, oxidase +ve\n• Brucella, Gram —ve, short bacillis causes PUO', 'role': 'assistant'}]