1) Nugent RP, Krohn MA, Hillier SL : Reliability of diagnosing bacterial vaginosis is improved by a standardized method of gram stain interpretation. J Clin Microbiol 29 : 297─301, 1991
2) Gravett MG, Nelson HP, DeRouen T, et al : Independent associations of bacterial vaginosis and Chlamydia trachomatis infection with adverse pregnancy outcome. JAMA 256 : 1899─1903, 1986
3) Hillier SL, Nugent RP, Eschenbach DA, et al : Association between bacterial vaginosis and preterm delivery of a low-birth-weight infant. The Vaginal Infections and Prematurity Study Group. N Engl J Med 333 : 1737─1742, 1995
4) Leitich H, Bodner-Adler B, Brunbauer M, et al : Bacterial vaginosis as a risk factor for preterm delivery : a meta-analysis. Am J Obstet Gynecol 189 : 139─147, 2003
5) Verstraelen H, Verhelst R, Roelens K, et al : Modified classification of Gram-stained vaginal smears to predict spontaneous preterm birth : a prospective cohort study. Am J Obstet Gynecol 196 : 528, e1─6, 2007
6) Sakai M, Ishiyama A, Tabata M, et al : Relationship between cervical mucus interleukin-8 concentrations and vaginal bacteria in pregnancy. Am J Reprod Immunol 52 : 106─112, 2004
7) Carey JC, Klebanoff MA, Hauth JC, et al : Metronidazole to prevent preterm delivery in pregnant women with asymptomatic bacterial vaginosis. National Institute of Child Health and Human Development Network of Maternal-Fetal Medicine Units. N Engl J Med 342 : 534─540, 2000
8) McDonald HM, Brocklehurst P, Gordon A : Antibiotics for treating bacterial vaginosis in pregnancy. Cochrane Database Syst Rev : CD000262, 2007
9) Nygren P, Fu R, Freeman M, et al : Evidence on the benefits and harms of screening and treating pregnant women who are asymptomatic for bacterial vaginosis : an update review for the U.S. Preventive Services Task Force. Ann Intern Med 148 : 220─233, 2008
10) Shimano S, Kawamura M, Sonoda T, et al : Possible association between screening BV at the prenatal visit and reduced cervical cerclage : multi-center questionnaire in Hokkaido, Japan. J Obstet Gynaecol Res 35 : 262─270, 2009