What is the Cause of Recurrent Urinary Tract Infection? Contemporary Microscopic Concepts of Pathophysiology
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Urinary tract infections (UTIs) are the most common infectious disease and are mainly caused by Escherichia coli. In this review, we introduce the current concept of recurrent UTI (rUTI) based on recent research dealing with pathophysiology of the disease. Although urine is considered sterile, recent studies dealing with microbiome have proposed different ideas. UTIs have typically been considered as extracellular infections, but recently, uropathogenic Escherichia coli (UPEC) has been shown to bind and replicate in the urothelium to make intracellular bacterial communities. Binding UPECs might proceed in many ways including extracellular expulsion for clearance or survival and quiescent intracellular reservoirs that can cause rUTI. Moreover, it is also suggested that other important factors, such as lipopolysaccharide and multimicrobial infection, can be the cause of rUTI. This review article reveals a key mechanism of recurrence and discusses what makes a pathway of resolution or recurrence in a host after initial infection.
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Approximately 25% of women experiencing a first UTI will develop a second episode, and 25% of them will show a third and further recurrence.
“Approximately 25% of women experiencing a first UTI will develop a second episode, and 25% of them will show a third and further recurrence [4, 5].”
Recurrences are more common in women than in men because of risk factors such as sexual intercourse, urogenital aging, pelvic organ prolapse, urethral diverticula, vesicovaginal fistula, urinary incontinence, menopause, and pregnancy.
“Recurrences are more common in women than in men because of risk factors such as sexual intercourse, urogenital aging, pelvic organ prolapse, urethral diverticula, vesicovaginal fistula, urinary incontinence, menopause, and pregnancy [5].”
IBCs may lead to bacterial persistence, an identical pathogen remaining dormant between two isolated episodes of UTIs.
“The IBCs may lead to a phenomenon known as Bacterial persistence: an identical pathogen remaining dormant between two isolated episodes of UTIs [5, 22].”
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Detection of Intracellular Bacterial Communities in Human Urinary Tract Infection
Rosen, D. A., Hooton, T. M., Stamm, W. E., Humphrey, P. A., & Hultgren, S. J. (2007) · PLoS Medicine · doi:10.1371/journal.pmed.0040329 · Cited by 651 · see citing works
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Cited by
Sorted by citations
- Authors
- Kim, A., Ahn, J. H., Choi, W. S., Park, H. K., Kim, S., Paick, S. H., & Kim, H. G.
- Affiliations
- Konkuk University (KR)
- Dankook University (KR)
- Corresponding author
- Kim, Hyeong Gon
- Venue
- International Neurourology Journal
- Publisher
- Korean Continence Society
- Published
- 2021-09-30
- Volume
- 25
- Issue
- 3
- Pages
- 192-201
- ISSN
- 2093-4777 (ISSN-L)
- 2093-6931
- PMC
- PMC8497731
- OpenAlex
- W3161134461
- Cited by
- 22
- References
- 1
- Citations by year
- 2026: 2 · 2025: 6 · 2024: 7 · 2023: 6 · 2022: 1
- FWCI
- 2.52
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Licence
- Locations
- International Neurourology Journal (publishedVersion, cc-by-nc)
- PubMed Central (publishedVersion, cc-by-nc)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- Konkuk University
- Topics
- Health Sciences › Medicine › Epidemiology › Urinary Tract Infections Management
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Endocrinology › Escherichia coli research studies
- Health Sciences › Medicine › Urology › Urinary Bladder and Prostate Research
- Keywords
- recurrent urinary tract infection, uropathogenic Escherichia coli, intracellular bacterial communities, urothelium, lipopolysaccharide, urinary microbiome, pathophysiology
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