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International Urogynecology Journal

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01-11-2019 | Cystitis | Original Article

Female lower urinary tract microbiota do not associate with IC/PBS symptoms: a case-controlled study

Authors: Larissa Bresler, Travis K. Price, Evann E. Hilt, Cara Joyce, Colleen M. Fitzgerald, Alan J. Wolfe

Published in: International Urogynecology Journal | Issue 11/2019

Abstract

Introduction and hypothesis

The current etiology of interstitial cystitis/painful bladder syndrome (IC/PBS) is poorly understood and multifactorial. Recent studies suggest the female urinary microbiota (FUM) contribute to IC/PBS symptoms. This study was designed to determine if the FUM, analyzed using mid-stream voided urine samples, differs between IC/PBS patients and controls.

Methods

This prospective case-controlled study compared the voided FUM of women with symptoms of urinary frequency, urgency, and bladder pain for > 6 months with the voided FUM of healthy female controls without pain. Bacterial identification was performed using 16S rRNA gene sequencing and EQUC, a validated enhanced urine culture approach. Urotype was defined by a genus present at > 50% relative abundance. If no genus was present above this threshold, the urotype was classified as ‘mixed.’ Group comparisons were performed for urotype and diversity measures.

Results

A mid-stream voided specimen was collected from 21 IC/PBS patients and 20 asymptomatic controls. The two groups had similar demographics. Urotypes did not differ between cohorts as assessed by either EQUC or 16S rRNA gene sequencing. We detected no significant differences between cohorts by alpha diversity. Cohorts also were not distinct using principle component analysis or hierarchical clustering. Detection by EQUC of bacterial species considered uropathogenic was high in both cohorts, but detection of these uropathogenic species did not differ between groups (p = 0.10).

Conclusions

Enhanced culture and DNA sequencing methods provide evidence that IC/PBS symptoms may not be related to differences in the FUM, at least not its bacterial components. Future larger studies are needed to confirm this preliminary finding.

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Title: Female lower urinary tract microbiota do not associate with IC/PBS symptoms: a case-controlled study
Authors: Larissa Bresler
Travis K. Price
Evann E. Hilt
Cara Joyce
Colleen M. Fitzgerald
Alan J. Wolfe
Publication date: 01-11-2019
Publisher: Springer International Publishing
Keywords: Cystitis
Respiratory Microbiota
Cystitis
Published in: International Urogynecology Journal / Issue 11/2019
Print ISSN: 0937-3462
Electronic ISSN: 1433-3023
DOI: https://doi.org/10.1007/s00192-019-03942-9

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Female lower urinary tract microbiota do not associate with IC/PBS symptoms: a case-controlled study

Abstract

Introduction and hypothesis

Methods

Results

Conclusions

Keynote webinar | Spotlight on medication adherence

Springer Medicine

Abstract

Introduction and hypothesis

Methods

Results

Conclusions

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