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Related Experiment Videos

Urinary tract infections caused by Staphylococcus saprophyticus. A matched case control study.

P Hedman1, O Ringertz

  • 1Department of Clinical Bacteriology, Karolinska Institute, Södersjukhuset, Stockholm, Sweden.

The Journal of Infection
|September 1, 1991
PubMed
Summary

Staphylococcus saprophyticus commonly causes urinary tract infections in young women, particularly after outdoor swimming. This bacterium is also a significant cause of upper urinary tract infections.

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Area of Science:

  • Urology
  • Infectious Diseases
  • Microbiology

Background:

  • Urinary tract infections (UTIs) are common, with various etiological agents.
  • Staphylococcus saprophyticus is a recognized cause of UTIs, particularly in specific demographics.

Purpose of the Study:

  • To investigate the epidemiological and clinical characteristics of urinary tract infections caused by Staphylococcus saprophyticus.
  • To compare S. saprophyticus UTIs with other bacterial UTIs regarding symptoms, risk factors, and complications.

Main Methods:

  • A case-control study design was employed.
  • 270 episodes of S. saprophyticus UTIs were randomly selected and matched with 276 other UTI episodes.
  • Data collected included patient demographics, clinical presentation, and potential risk factors.

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Main Results:

  • S. saprophyticus UTIs predominantly affect young women in outpatient settings.
  • Risk factors included occupational exposure (meat handlers) and outdoor swimming.
  • Symptoms like lower urinary tract inflammation, hematuria, and pyuria were more frequent.
  • S. saprophyticus caused 13% of upper UTIs, a higher incidence than other bacteria.
  • Lower correlation with nephrolithiasis and catheter-induced infections was observed.

Conclusions:

  • Staphylococcus saprophyticus is a significant pathogen in young women's UTIs, with distinct clinical and epidemiological features.
  • The association with outdoor swimming and its role in upper UTIs warrant further attention.
  • S. saprophyticus is less implicated in complicated UTIs such as those associated with kidney stones or catheters.