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Research Article

The Female Urinary Microbiome: a Comparison of Women with and without Urgency Urinary Incontinence

Meghan M. Pearce, Evann E. Hilt, Amy B. Rosenfeld, Michael J. Zilliox, Krystal Thomas-White, Cynthia Fok, Stephanie Kliethermes, Paul C. Schreckenberger, Linda Brubaker, Xiaowu Gai, Alan J. Wolfe
Martin J. Blaser, Editor
Meghan M. Pearce
aDepartment of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Evann E. Hilt
aDepartment of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
bInfectious Disease and Immunology Research Institute, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Amy B. Rosenfeld
cDepartment of Molecular Pharmacology and Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Michael J. Zilliox
cDepartment of Molecular Pharmacology and Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Krystal Thomas-White
aDepartment of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Cynthia Fok
dDepartments of Obstetrics & Gynecology and Urology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Stephanie Kliethermes
eDepartments of Medicine and Public Health Sciences, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Paul C. Schreckenberger
bInfectious Disease and Immunology Research Institute, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
fDepartment of Pathology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Linda Brubaker
dDepartments of Obstetrics & Gynecology and Urology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Xiaowu Gai
cDepartment of Molecular Pharmacology and Therapeutics, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Alan J. Wolfe
aDepartment of Microbiology and Immunology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
bInfectious Disease and Immunology Research Institute, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois, USA
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Martin J. Blaser
New York University
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DOI: 10.1128/mBio.01283-14
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ABSTRACT

Bacterial DNA and live bacteria have been detected in human urine in the absence of clinical infection, challenging the prevailing dogma that urine is normally sterile. Urgency urinary incontinence (UUI) is a poorly understood urinary condition characterized by symptoms that overlap urinary infection, including urinary urgency and increased frequency with urinary incontinence. The recent discovery of the urinary microbiome warrants investigation into whether bacteria contribute to UUI. In this study, we used 16S rRNA gene sequencing to classify bacterial DNA and expanded quantitative urine culture (EQUC) techniques to isolate live bacteria in urine collected by using a transurethral catheter from women with UUI and, in comparison, a cohort without UUI. For these cohorts, we demonstrated that the UUI and non-UUI urinary microbiomes differ by group based on both sequence and culture evidences. Compared to the non-UUI microbiome, sequencing experiments revealed that the UUI microbiome was composed of increased Gardnerella and decreased Lactobacillus. Nine genera (Actinobaculum, Actinomyces, Aerococcus, Arthrobacter, Corynebacterium, Gardnerella, Oligella, Staphylococcus, and Streptococcus) were more frequently cultured from the UUI cohort. Although Lactobacillus was isolated from both cohorts, distinctions existed at the species level, with Lactobacillus gasseri detected more frequently in the UUI cohort and Lactobacillus crispatus most frequently detected in controls. Combined, these data suggest that potentially important differences exist in the urinary microbiomes of women with and without UUI, which have strong implications in prevention, diagnosis, or treatment of UUI.

IMPORTANCE New evidence indicates that the human urinary tract contains microbial communities; however, the role of these communities in urinary health remains to be elucidated. Urgency urinary incontinence (UUI) is a highly prevalent yet poorly understood urinary condition characterized by urgency, frequency, and urinary incontinence. Given the significant overlap of UUI symptoms with those of urinary tract infections, it is possible that UUI may have a microbial component. We compared the urinary microbiomes of women affected by UUI to those of a comparison group without UUI, using both high-throughput sequencing and extended culture techniques. We identified statistically significant differences in the frequency and abundance of bacteria present. These differences suggest a potential role for the urinary microbiome in female urinary health.

FOOTNOTES

    • Received 15 May 2014
    • Accepted 5 June 2014
    • Published 8 July 2014
  • Copyright © 2014 Pearce et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-ShareAlike 3.0 Unported license, which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original author and source are credited.

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The Female Urinary Microbiome: a Comparison of Women with and without Urgency Urinary Incontinence
Meghan M. Pearce, Evann E. Hilt, Amy B. Rosenfeld, Michael J. Zilliox, Krystal Thomas-White, Cynthia Fok, Stephanie Kliethermes, Paul C. Schreckenberger, Linda Brubaker, Xiaowu Gai, Alan J. Wolfe
mBio Jul 2014, 5 (4) e01283-14; DOI: 10.1128/mBio.01283-14

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The Female Urinary Microbiome: a Comparison of Women with and without Urgency Urinary Incontinence
Meghan M. Pearce, Evann E. Hilt, Amy B. Rosenfeld, Michael J. Zilliox, Krystal Thomas-White, Cynthia Fok, Stephanie Kliethermes, Paul C. Schreckenberger, Linda Brubaker, Xiaowu Gai, Alan J. Wolfe
mBio Jul 2014, 5 (4) e01283-14; DOI: 10.1128/mBio.01283-14
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