Evidence map›Paper›PMID 30677048›Full record

ArticlePloS one2019

Association between vaginal washing and vaginal bacterial concentrations.

Michelle C Sabo, Jennifer E Balkus, Barbra A Richardson, Sujatha Srinivasan, Joshua Kimani, Omu Anzala, Jane Schwebke, Tina L Feidler, David N Fredricks, R Scott McClelland

Abstract read
In one paragraph

Article in PloS one, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

23 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  5. Article
  6. The Vaginal Microbiome and Reproductive Health in Adolescents and Adults.Journal of pediatric and adolescent gynecology · 2025
    Review
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  9. American journal of translational research · 2024
    Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Michelle C SaboDepartment of Medicine, University of Washington, Seattle, WA, United States of America.ORCID 0000-0002-5058-3166
Jennifer E BalkusDepartment of Global Health, University of Washington, Seattle, WA, United States of America.
Barbra A RichardsonDepartment of Global Health, University of Washington, Seattle, WA, United States of America.
Sujatha SrinivasanVaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States of America.
Joshua KimaniInstitute for Tropical and Infectious Diseases, University of Nairobi, Nairobi, Kenya.
Omu AnzalaDepartment of Medical Microbiology, University of Nairobi, Nairobi, Kenya.
Jane SchwebkeDivision of Infectious Disease, University of Alabama at Birmingham, Birmingham, AL, United States of America.
Tina L FeidlerVaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States of America.
David N FredricksDepartment of Global Health, University of Washington, Seattle, WA, United States of America.
R Scott McClellandDepartment of Medicine, University of Washington, Seattle, WA, United States of America.ORCID 0000-0003-2574-4201

Funding

University of Washington/Fred Hutch Center for AIDS ResearchP30AI027757 · NIAID · UNIVERSITY OF WASHINGTON · PI EDWIN ROBERTO ORELLANA · 1988 to 2026
$104.9M
HOST DEFENSE TRAINING IN ALLERGY AND INFECTIOUS DISEASEST32AI007044 · NIAID · UNIVERSITY OF WASHINGTON · PI DAVID Neal FREDRICKS · 1985 to 2026
$14.6M
Impact of suppressive antimicrobial therapy on the vaginal microbiota and BVR01AI099106 · NIAID · UNIVERSITY OF WASHINGTON · PI MCCLELLAND, RAYMOND SCOTT · 2012 to 2014
$1.8M
RCT of an Implementation Science Tool to Integrate HIV testing into Family Planning Services K24HD088229 · NICHD · UNIVERSITY OF WASHINGTON · PI MCCLELLAND, RAYMOND SCOTT · 2016 to 2020
$863k
NIAID NIH HHS P30 AI027757NIAID NIH HHS R01 AI099106NIAID NIH HHS T32 AI007044NICHD NIH HHS K24 HD088229
6 · The paper itself

Abstract

Vaginal washing is a common practice associated with adverse outcomes including bacterial vaginosis (BV) and HIV infection. Prior studies have not examined the associations between vaginal washing and individual vaginal bacteria, or whether these associations are independent of the effect of vaginal washing on BV. The purpose of this study was to characterize the association between vaginal washing and the presence and concentrations of vaginal bacteria associated with optimal and sub-optimal vaginal states. The analysis utilized data from participants in the placebo arm of the Preventing Vaginal Infections trial, which enrolled HIV-uninfected women from the United States and Kenya. Detection of bacterial taxa associated with BV was compared between visits with versus without reported vaginal washing. The effect of vaginal washing on a number of vaginal bacteria differed substantially (p<0.05) between the US and Kenya, so results were stratified by country. In US women, vaginal washing was associated with a significantly higher likelihood of detection of BV associated bacterium 1 (BVAB1) (relative risk [RR] 1.55, 95% confidence interval [CI] 1.15-2.09, p = 0.004), BVAB2 (RR 1.99, 95%CI 1.46-2.71, p<0.001), Mageeibacillus indolicus (RR 2.08, 95%CI 1.46-2.96, p<0.001), Atopobium vaginae (RR 1.34, 95%CI 1.13-1.59, p = 0.001), Leptotrichia/Sneathia species (RR 1.66, 95% CI 1.33-2.09, p<0.001), Megasphaera species (RR 1.78, 95%CI 1.34-2.37, p<0.001) and Gardnerella vaginalis (RR 1.08, 95%CI 1.01-1.16, p = 0.02). No significant association between vaginal washing and bacterial detection was found in Kenyan women. Adjustment for bacterial vaginosis diagnosed by Gram stain did not alter these results. This study provides evidence that the association between vaginal washing and detection of individual bacterial taxa can vary regionally. For some vaginal bacteria, the association with vaginal washing may be independent of the effect on Gram stain detection of BV. Larger prospective studies in diverse geographic settings should explore whether eliminating vaginal washing impacts the presence and concentrations of key vaginal bacteria.

Indexed as

AdolescentAdultBacterial LoadCross-Cultural ComparisonFemaleHumansKenyaMicrobiotaMiddle AgedRiskSpecies SpecificityUnited StatesVaginaVaginal DouchingVaginosis, BacterialYoung Adult

Identifiers

PMID30677048
PMCPMC6345501

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.