This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pediatrics
[{'content': 'A newborn of 7 days old presented with meningitis. Most common cause is ____________ \nSelect and explain. \nA. E.coli, B. Streptococcal pneumonia, C. N. Meningitis, D. Streptococcal aureus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most common cause meningitis in newborn is due to EColi. The incidence of early-onset meningitis has been greatly reduced by the initiation of intrapaum antibiotics to combat Group B streptococcus (GBS) infection. However, GBS remains the most common cause of both meningitis and neonatal sepsis, causing greater than 40% of all early-onset infections.The next common pathogen in this group is E. coli and has emerged as the most common cause of early-onset sepsis and meningitis among very low bih weight (VLBW, less than 1500 g) infants. Ref : Ghai pediatrics eighth edition pg no 563', 'role': 'assistant'}]