This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: FMGE 2018, Subject name: Microbiology
[{'content': 'Which of the following is the most likely cause in a case of granuloma? \nSelect and explain. \nA. Cat scratch disease, B. Trench fever, C. Leprosy, D. Syphilis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Various granulomatous diseases and their causitive agents. Tubeculosis -Mycobacterium tuberculosis Leprosy -Mycobacterium Leprae Syphilis -Treponema palidium Cat-scratch disease - Baonella henselae (Gram-negative bacillus) Crohn disease (inflammatory bowel disease)- Immune reaction against intestinal bacteria, possibly self antigens', 'role': 'assistant'}]