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Urovirulence determinants in Escherichia coli strains causing prostatitis

A Andreu1, A E Stapleton, C Fennell

  • 1Servei de Microbiologia, Hospitals Vall d'Hebron, Universitat Autonoma de Barcelona, Spain.

The Journal of Infectious Diseases
|August 1, 1997
PubMed
Summary

Escherichia coli strains causing prostatitis share virulence traits with those causing pyelonephritis in women. Prostatitis strains frequently express hemolysin and cytotoxic necrotizing factor-1 (CNF-1).

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Area of Science:

  • Urology
  • Microbiology
  • Infectious Diseases

Background:

  • Prostatitis is a common condition in men, often caused by Escherichia coli.
  • Understanding the virulence factors of E. coli in prostatitis is crucial for effective treatment.
  • Previous studies have focused on E. coli virulence in women's urinary tract infections.

Purpose of the Study:

  • To compare the urovirulence properties of E. coli strains from men with prostatitis to those from women with various urinary tract infections (UTIs).
  • To identify specific virulence factors prevalent in E. coli causing prostatitis.

Main Methods:

  • E. coli strains were isolated from men with acute or chronic prostatitis and women with pyelonephritis, acute cystitis, or complicated UTIs.
  • Strains were analyzed for the expression of hemolysin, cytotoxic necrotizing factor-1 (CNF-1), and P fimbriae.

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Main Results:

  • E. coli strains from prostatitis patients showed significantly higher hemolysin expression compared to those from complicated UTIs (73% vs. 43%).
  • Prostatitis strains also demonstrated higher CNF-1 hybridization (63%) than strains from women (44%-48%).
  • P fimbrial expression was highest in pyelonephritis (73%) and prostatitis (53%) strains, and lowest in complicated UTI (23%) and cystitis (30%) strains.

Conclusions:

  • E. coli strains causing prostatitis exhibit urovirulence profiles similar to those causing acute uncomplicated pyelonephritis in women.
  • Hemolysin and CNF-1 are particularly prevalent virulence factors in E. coli strains associated with prostatitis.