The most common cause of meningitis in newborn infants is Streptococcus agalactiae, a
A) Gram-positive group A streptococcus.
B) Gram-negative group B streptococcus.
C) fungus that often colonizes a woman's vagina.
D) group A streptococcus that often colonizes a woman's vagina.
E) group B streptococcus that often colonizes a woman's vagina.
