The Vaginal Infections and Prematurity (VIP) Study, jointly sponsored by NICHD and NIAID, is a prospective study designed to investigate the relationship between genital tract colonization with various microorganisms and the subsequent development of preterm birth. It also incorporates a clinical trial of erythromycin to prevent preterm birth among women colonized with Ureaplasma urealyticum, Chlamydia trachomatis, and group B streptococcus. In addition, the VIP collected a wealth of additional data on a variety of factors possibly linked to pregnancy outcome. Analyses undertaken to date include the predictive value of vaginal Gram stain in the identification of group B streptococcus, the descriptive epidemiology of group B streptococcal carriage, the relationship between reported physical activity and preterm birth, the effect of treatment with erythromycin on pregnancy outcome among women colonized with group B streptococci, and the association between sexual intercourse during pregnancy and preterm birth among women colonized with different genital microorganisms, effect of group B streptococcal colonization on pregnancy outcome, the association between bacterial vaginosis and pregnancy outcome, the effect of treatment with erythromycin on pregnancy outcome among women colonized with Chlamydia trachomatis, and ethnic differences in genital flora. Planned analyses for 2002 include evaluating the combined effects of metronidazole and erythromycin on preterm birth among women with bacterial vaginosis

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U.S. National Inst/Child Hlth/Human Dev
United States
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Carey, J Christopher; Klebanoff, Mark A (2005) Is a change in the vaginal flora associated with an increased risk of preterm birth? Am J Obstet Gynecol 192:1341-6; discussion 1346-7
Fiscella, Kevin; Klebanoff, Mark A (2004) Are racial differences in vaginal pH explained by vaginal flora? Am J Obstet Gynecol 191:747-50
Carey, J Christopher; Klebanoff, Mark A; National Institute of Child Health and Human Development Maternal-Fetal Medicine Units Network (2003) What have we learned about vaginal infections and preterm birth? Semin Perinatol 27:212-6
Klebanoff, Mark A; Guise, Jeanne-Marie; Carey, J Christopher (2003) Treatment recommendations for bacterial vaginosis in pregnant women. Clin Infect Dis 36:1630-1; author reply 1631-2