1. Anthony BF, Okada DM, Hobel CJ. Epidemiology of group B streptococcus: longitudinal observations during pregnancy. J Infect Dis 1978; 137: 524–30.
2. Regan JA, Klebanoff MA, Nugent RP, for the Vaginal Infections and Prematurity Study Group. epidemiology of group B streptococcal colonization in pregnancy. Obstet Gynecol 1991; 77: 604–610.
3. Yow MD, Leeds LJ, Thompson PK, Mason EO, Clark DJ, Beachler CW. The natural history of group B streptococcal colonization in the pregnant woman and her offspring. I. Colonization studies. Am J Obstet Gynecol 1980; 137: 34–38.
4. Dillon HC, Gray E, Pass MA, Gray BM. Anorectal and vaginal carriage of group B streptococci during pregnancy. J Infect Dis 1982; 145: 794–799.
5. Boyer KM, Gadzala CA, Kelly PD, Burd LI, Gotoff SP. Selective intrapartum chemoprophylaxis of neonatal group B streptococcal early-onset disease. II. Predictive value of prenatal cultures. J Infect Dis 1983; 148: 802–809.