injections National Center for Biotechnology Information NCBI NLM MEDLINE humans pubmed abstract nih national institutes of health national library of medicine pregnancy female Infant newborn pregnancy complications infectious / microbiology clindamycin / therapeutic use streptococcal infections / microbiology intravenous streptococcal infections / drug therapy carrier state / drug therapy infectious / diagnosis* carrier state / microbiology clinical protocols infectious / drug therapy carrier state / diagnosis* vagina / microbiology ampicillin / therapeutic use streptococcal infections / prevention & control rectum / microbiology streptococcus agalactiae / isolation & purification* streptococcal infections / diagnosis* pmid:8116707 doi:10.1016/s0002-9378(94)70221-7 v l katz m k moos s d wells cefazolin / therapeutic use chorioamnionitis / drug therapy obstetric labor complications / drug therapy infectious / prevention & control