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: Medicine
[{'content': 'The Limulus amebocyte lysate assay is a rapid diagnostic test used for the detection of: \nSelect and explain. \nA. Meningitis, B. Pneumonia, C. Septicemia, D. Endocarditis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The Limulus amebocyte lysate assay is a rapid diagnostic test for the detection of gram-negative endotoxin in CSF and thus for making a diagnosis of gram-negative bacterial meningitis. The test has a specificity of 85-100% and a sensitivity approaching 100%. Ref: Harrisons principles of internal medicine, 18th edition, Page: 2356', 'role': 'assistant'}]