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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Which of the following agent is least likely to cause Meningitis in the elderly?
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The correct answer is  In elderly, viral meningitis is relatively uncommon. Listeria monocytogenes, streptococcus pneumonia and gram negative bacteria are common causes of meningitis affecting the elderly. So HSV-2 is the single best answer of choice. Ref: Harrison's Principles of Internal Medicine, 16th Edition, Pages 2471-72; Manual of Practical Medicine By R Alagappan, 3rd Edition, Page 524