Table 1. Etiology of neonatal meningitis.

United States	Developing countries
Group B streptococcus (GBS)	Gram negative bacteria
Most common cause	Most common cause
E. Coli	Klebsiella
Listeria	E. Coli
	Staphylococcus aureus
Less common	Less common
Enterococci	Enterobacter
Staphylococcus aureus	Citrobacter
	Serratia