This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: New Born Infants, Subject name: Pediatrics
After 5 days of birth, a baby develops poor feeding, fever and convulsions; CSF examination shows low sugar and high proteins. The most likely cause of these symptoms: 
Select and explain. 
A. L. monocytogenes, B. Meningococcus, C. S. pneumonia, D. Leptospira
A: L. monocytogenes
Answer: A: L. monocytogenes 
Explanation: Ans. A. L. monocytogenesThis child has symptoms of meningitis; the most common cause of neonatal meningitis is Group B Streptococcus, and E. coli. Other known causes are Klebsiella, S. aureus, and Listeria.