This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
[{'content': 'A 12-year-old boy with sickle cell disease presents with pain and swelling of the right lower extremity. A bone scan reveals osteomyelitis of the tibial diaphysis. An organism found more commonly than in the general population in these cases is: \nSelect and explain. \nA. influenzae, B. Salmonella species, C. Klebsiella species, D. Bacteroides species', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Although S. aureus is the most common organism found in osteomyelitis associated with sickle-cell disease, nontyphoid salmonella species are often found. Salmonella bacteria are thought to escape from the colonized colon due to microvascular infarcts secondary to sickle-cell disease. They then seed the bone via hematogenous spread.', 'role': 'assistant'}]