Carol A. Stamm

Douching in relation to bacterial vaginosis, lactobacilli, and facultative bacteria in the vagina

OBJECTIVE To study how frequency, recentness, and reason for douching impact bacterial vaginosis‐related vaginal microflora and the occurrence of cervical pathogens. Douching has been linked to bacterial vaginosis as well as to chlamydial cervicitis in some, but not all, studies. METHODS A total of 1200 women at high risk for sexually transmitted infections were enrolled from five clinical sites around the United States. Cross‐sectional, structured interviews were conducted and vaginal swabs were self‐obtained for Gram stain, culture, and DNA amplification tests for Neisseria gonorrhoeae and Chlamydia trachomatis. RESULTS Douching at least once per month was associated with an increased frequency of bacterial vaginosis. Those who douched recently (within 7 days) were at highest risk [odds ratio (OR) 2.1, 95% confidence interval (CI) 1.3, 3.1]. Douching for symptoms (OR 1.7, 95% CI 1.1, 2.6) and for hygiene (OR 1.3, 95% CI 1.0, 1.9) both related to bacterial vaginosis risk. The associations between douching and Gardnerella vaginalis, Mycoplasma hominis, and lack of hydrogen peroxide‐producing lactobacilli were similar to those between douching and bacterial vaginosis. Gonococcal or chlamydial cervicitis was not associated with douching. CONCLUSION Douching for symptoms or hygiene, particularly frequent or recent douching, was associated with bacterial vaginosis and bacterial vaginosis‐associated vaginal microflora, but not with gonococcal or chlamydial cervicitis.

Bacterial vaginosis and risk of pelvic inflammatory disease.

BACKGROUND: Bacterial vaginosis commonly is found in women with pelvic inflammatory disease (PID), but it is unclear whether bacterial vaginosis leads to incident PID. METHODS: Women (n = 1,179) from 5 U.S. centers were evaluated for a median of 3 years. Every 6–12 months, vaginal swabs were obtained for gram stain and culture of microflora. A vaginal microflora gram stain score of 7–10 was categorized as bacterial vaginosis. Pelvic inflammatory disease was diagnosed by presence of either histologic endometritis or pelvic pain and tenderness plus one of the following: oral temperature greater than 38.3°C; sedimentation rate greater than 15 mm/hour; white blood count greater than 10,000; or lower genital tract detection of leukorrhea, mucopus, or Neisseria gonorrhoeae or Chlamydia trachomatis. RESULTS: After adjustment for relevant demographic and lifestyle factors, baseline bacterial vaginosis was not associated with the development of PID (adjusted hazard ratio 0.89, 95% confidence interval 0.55–1.45). Carriage of bacterial vaginosis in the previous 6 months before a diagnosis (adjusted risk ratio 1.31, 95% confidence interval 0.71–2.42) also was not significantly associated with PID. Similarly, neither absence of hydrogen peroxide–producing Lactobacillus nor high levels of Gardnerella vaginalis significantly increased the risk of PID. Dense growth of pigmented, anaerobic gram-negative rods in the 6 months before diagnosis did significantly increase a womans risk of PID (P = .04). One subgroup of women, women with 2 or more recent sexual partners, demonstrated associations among bacterial vaginosis, Gardnerella vaginalis, anaerobic gram-negative rods, and PID. CONCLUSION: In this cohort of high-risk women, after adjustment for confounding factors, we found no overall increased risk of developing incident PID among women with bacterial vaginosis. LEVEL OF EVIDENCE: II-2

Why women douche and why they may or may not stop

Background Although douching is common, it is a potentially harmful habit. Goal We studied attitudes and knowledge around the behavior of douching. Study Design Of 1200 women enrolled in this multisite study, 532 douched and answered questions on a structured interview regarding douching behaviors. Results Over half had douched for 5 or more years. Douching was most often initiated on the recommendation of female relatives and practiced for reasons of hygiene. Half of women considered douching to be healthy. Those who considered douching to be unhealthy reported that douching may disrupt vaginal flora but did not cite more serious risks. Nonetheless, women who had been advised by a health professional to stop douching were less likely to consider douching healthful and were more likely to have tried to stop. Conclusion Women had a limited understanding of potential adverse health consequences associated with douching. Targeted health messages may influence women to initiate douching cessation.

Bacterial vaginosis (BV) and the risk of incident gonococcal or chlamydial genital infection in a predominantly black population

Objective: The objective of this study was to assess in prospective data whether bacterial vaginosis (BV) is associated with gonococcal/chlamydial cervicitis. Study: A total of 1179 women at high risk for sexually transmitted infections was followed for a median of 3 years. Every 6 to 12 months, vaginal swabs were obtained for Gram stain, culture of microflora, and Neisseria gonorrhoeae and Chlamydia trachomatis. A Gram stain score of 7 to 10 based on the Nugent criteria categorized BV. Results: Baseline BV was associated with concurrent gonococcal/chlamydial infection (adjusted odds ratio, 2.83; 95% confidence interval [CI], 1.81–4.42). However, the association between BV and subsequent, incident gonococcal/chlamydial genital infection was not significant (adjusted relative risk [RR], 1.52; 95% CI, 0.74–3.13). Dense growth of pigmented, anaerobic Gram-negative rods (adjusted RR, 1.93; 95% CI, 0.97–3.83) appeared to elevate the risk for newly acquired gonococcal/chlamydial genital infection. Conclusions: BV was common among a predominantly black group of women with concurrent gonococcal/chlamydial infection but did not elevate the risk for incident infection.

Variability of bacterial vaginosis over 6- to 12-month intervals

Objectives: To examine variability in bacterial vaginosis (BV) over 6- to 12-month intervals. Study Design: One thousand one hundred ninety-three women were followed for a median of 3 years with serial vaginal swab Gram stains for BV. Discrete time hazard models were fit to identify independent risk factors for BV. Results: Women with BV at study entry were categorized as having normal flora at the next visit 20% of the time, and women with normal flora at study entry were categorized as having BV at the next visit 20% of the time. Among women with initially normal flora, factors associated with BV were black race, lower education, a history of BV, a history of chlamydial/gonococcal cervicitis, and lack of monogamy. Conclusion: About one fifth of women with normal flora develop BV over a given 6- to 12-month interval, and the modifiable risk factors of cervicitis and lack of monogamy contribute to the development of BV.

Bacterial vaginosis and risk of pelvic inflammatory disease

This multicenter study was conducted to investigate the association of pelvic inflammatory disease (PID) and bacterial vaginosis. Participants were recruited from women who were attending family planning, health, gynecology, and sexually transmitted disease (STD clinics in 5 medical centers. Eligible patients were women not seeking care for STD, but who were considered at high risk for acquiring STDs according to an algorithm that weighed age, race parity, number of sexual partners, habit of douching, and a history. The vaginal swabs were self-collected. Participating patients were instructed in the use of a cotton swab to collect their vaginal specimens. At intervals of 6 to 12 months, the self-obtained specimens were examined for the characteristics of bacterial vaginosis. A vaginal microflora gram stain score of 7 to 10 was considered bacterial vaginosis. Women who developed pelvic pain or who were positive for Neisseria gonorrhoeae or Chlamydia trachomatis underwent a clinical examination and endometrial biopsy for detection of PID. A diagnosis of PID required the presence of histologic endometritis and/or pelvic pain and tenderness accompanied by either a fever of 101° F or higher, sedimentary rate greater than 15 mm/hr, elevated white blood count, or leukorrhea, mucopus, N. gonorrhea, or C. trachomatis in the lower genital tract. There were 1179 patients included in the analysis. The average follow up was 4 years. At the initial examination, 428 women had normal vaginal flora (36%), 280 had intermediate flora (29%), and 471 had bacterial vaginosis (40%). The baseline diagnosis was not associated with the rate of detection of PID over the 4 years of follow up. Nor was the development of PID significantly associated with age, race, education, income, smoking, sex during menses, condom use, or a history of STD or PID. Analyses according to various subgroups of patients (younger/older women, black/white women, women with/without a history of PID, with/without baseline gonococcal or chlamydia genital infection) found that only women who had a baseline report of 2 or more sexual partners in the previous 2 months and who had a baseline diagnosis of bacterial vaginosis were significantly more likely to have PID. An absence of hydrogen peroxide-producing lactobacillus was not associated with PID, even among the various subgroups. A baseline diagnosis of G. vaginalis or Gram-negative rod growth above 4 had no association with PID except in the subgroup of women who reported 2 or more sexual partners in the previous 2 months. Women with baseline diagnoses of N. gonorrhea or C. trachomatis were more likely to have PID.

Clinical pathway for evaluating women with abnormal uterine bleeding

OBJECTIVE To devise a clinical pathway for evaluating women with abnormal uterine bleeding. STUDY DESIGN One thousand women with the complaint of abnormal uterine bleeding were enrolled. All would have undergone endometrial biopsy based on older recommendations. The patients followed a clinical pathway to determine if an endometrial biopsy was necessary. The pathway divided women into the categories of premenopausal, postmenopausal, low risk and high risk. If one risk factor was present, the patient underwent endometrial biopsy. If there were no risk factors, the patient continued down the pathway with medical therapy. RESULTS Five hundred seventy endometrial biopsies were performed. Five cases of endometrial cancer and three of complex atypical hyperplasia, both in the postmenopausal, high-risk group, were discovered. Subsequent reviews revealed that no cases of endometrial cancer were missed or developed in the two years following the initial complaint. CONCLUSION Utilization of a clinical pathway reduced the number of endometrial biopsies by 50%. The introduction of clinical pathways at our institution was done successfully in the evaluation of abnormal uterine bleeding.