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: Unknown
In a case of neonatal meningitis, the etiologic bacteria was found to have properties of β hemolysis, bacitracin resistance, CAMP positive. Which of the following is most likely causative agent? 
Select and explain. 
A. S. pyogenes, B. S. agalactiae, C. S. pneumonia, D. E. faecalis
A: S. pyogenes
Answer: A: S. pyogenes 
Explanation: S. agalactiaeis the most common cause of neonatal meningitis in west.
It does not hydrolyse bile esculin agar, however hydrolyse sodium hippurate and are bacitracin resistant.
Identified by CAMP (Christie, Atkins and Munch – Peterson) reaction.