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Related Experiment Videos

Polymicrobial and monomicrobial bacteraemic urinary tract infection

Y Siegman-Igra1, T Kulka, D Schwartz

  • 1Infectious Disease Unit, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Israel.

The Journal of Hospital Infection
|September 1, 1994
PubMed
Summary

Polymicrobial urosepsis, often hospital-acquired and linked to catheters, has higher mortality than monomicrobial infections. Distinct clinical and bacterial features differentiate these conditions in bacteraemic urinary tract infections.

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Area of Science:

  • Infectious Diseases
  • Clinical Microbiology
  • Urology

Background:

  • Bacteraemic urinary tract infections (UTIs) can be monomicrobial or polymicrobial.
  • Limited data exists on distinguishing features between monomicrobial and polymicrobial urosepsis.
  • Polymicrobial infections complicate the understanding and management of UTIs.

Purpose of the Study:

  • To identify clinical, bacteriological, and prognostic differences between monomicrobial and polymicrobial urosepsis.
  • To compare characteristics of patients with single versus multiple organism growth in blood/urine cultures.
  • To inform differential diagnosis and treatment strategies for bacteraemic UTIs.

Main Methods:

  • Retrospective analysis of 198 episodes of urosepsis (1980-1984).

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  • Categorization into monomicrobial and polymicrobial infections based on blood and urine cultures.
  • Comparison of epidemiological, microbiological, and outcome data.

    • Main Results:

    • 34% of urosepsis episodes were polymicrobial.
    • Polymicrobial infections were more frequent in hospital-acquired cases and associated with urinary catheters.
    • Pseudomonas aeruginosa was more common in polymicrobial infections; Escherichia coli in monomicrobial.
    • Mortality was higher in polymicrobial urosepsis, especially with multiple organisms in blood cultures.

    Conclusions:

    • Polymicrobial bacteraemic UTIs possess distinct clinical, microbiological, and prognostic profiles compared to monomicrobial cases.
    • Hospital acquisition and urinary catheter use are risk factors for polymicrobial urosepsis.
    • Identifying polymicrobial infections is crucial for risk stratification and improved patient outcomes.