<prompt> When neonatal meningitis is caused by streptococci, they usually are:Streptococcus pyogenes Group AStreptococcus Agalactiae Group BStreptococcus Sanguis ViridansStreptococcus pneumoniae Serotype B  <response>: Neonatal sepsis and meningitis is usually caused by Group B streptococci Streptococcus agalactiae. The organism infects the neonate from the mothers vaginal flora about 20 of women carry group B streptococci during vaginal delivery. Group B streptococci give a positive reaction in the cAMP test, where there is a zone of complete hydrolysis when it is inoculated perpendicular to the streak of S. aureus. Ref: Thilo E.H., Rosenberg A.A. 2012. Chapter 2. The Newborn Infant. In W.W. Hay, Jr., M.J. Levin, R.R. Deterding, J.J. Ross, J.M. Sondheimer Eds, CURRENT Diagnosis Treatment: Pediatrics, 21e. 