• Catriona Susan Bradshaw, Anna N Morton, Suzanne M Garland, Margaret B Morris, Lorna M Moss, and Christopher K Fairley.
• Melbourne Sexual Health Centre, The Alfred Hospital, Victoria, Australia.
• Obstet Gynecol. 2005 Jul 1;106(1):105-14.

ObjectiveBacterial vaginosis has been associated with hormonal factors and sexual practices; however, the cause is unclear, and the notion that bacterial vaginosis is a sexually transmitted infection is still debated. To investigate whether bacterial vaginosis is associated with specific sexual practices or instead has features in common with a sexually transmitted infection, we compared behavioral associations in women with bacterial vaginosis to women with vaginal candidiasis.MethodsWomen with symptoms of abnormal vaginal discharge or odor who attended Melbourne Sexual Health Centre between July 2003 and August 2004 were eligible for enrollment in the study. Information on demographics and behavioral and contraceptive practices were collected by self-completed questionnaire. Participants were tested for bacterial vaginosis, Candida spp (microscopy and culture), and sexually transmitted infections. Statistical comparisons were made between women with and without bacterial vaginosis and women with and without candidiasis, using univariate and multivariate analysis.ResultsA total of 342 women were enrolled in the study; 157 were diagnosed with bacterial vaginosis, 51 had candidiasis by microscopy, and 95 had candidiasis by culture. Bacterial vaginosis was associated with indicators of high-risk sexual behavior such as a new sexual partner and greater number of male partners in the last year, increased number of lifetime sexual partners, less than 13 years of education, a past history of pregnancy, and smoking (P < .05). Candidiasis was not associated with these risk behaviors and was instead related to practices such as receptive anal and oral sex and douching.ConclusionThe association between bacterial vaginosis and practices that are associated with sexually transmitted infections, in contrast to those observed with candidiasis, suggests a possible sexually transmitted cause.Level Of EvidenceII-2.

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