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Related Experiment Videos

Resistant pathogens in urinary tract infections.

Lindsay E Nicolle1

  • 1Department of Internal Medicine, University of Manitoba, Winnipeg, Canada. lnicolle@hsc.mb.ca

Journal of the American Geriatrics Society
|July 18, 2002
PubMed
Summary

Antimicrobial resistance in urinary tract infections (UTIs) is rising, especially in older adults. Prioritize urine cultures before antibiotics to guide treatment and avoid unnecessary use, particularly for asymptomatic bacteriuria.

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Area of Science:

  • Microbiology
  • Infectious Diseases
  • Pharmacology

Background:

  • Antimicrobial susceptibility in urinary tract infections (UTIs) has shifted due to decades of antimicrobial exposure, leading to increased resistance.
  • Older populations, including those in long-term care facilities, exhibit a higher prevalence of resistant bacteria in UTIs compared to the general community.

Purpose of the Study:

  • To highlight the evolving landscape of antimicrobial resistance in UTIs.
  • To emphasize the importance of judicious antimicrobial use and appropriate diagnostic practices in managing UTIs.

Main Methods:

  • Review of trends in antimicrobial resistance patterns for common uropathogens.
  • Analysis of factors associated with the isolation of resistant organisms in UTI cases.
  • Evaluation of current guidelines and best practices for UTI treatment.

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Main Results:

  • Resistant isolates, including common uropathogens like Escherichia coli and Proteus mirabilis, are increasingly prevalent, particularly in older adults and long-term care settings.
  • Prior antimicrobial exposure and higher functional impairment are consistently linked to the isolation of resistant bacteria.
  • Asymptomatic bacteriuria is common and should not be treated with antimicrobials.

Conclusions:

  • Obtaining urine cultures and susceptibility testing before initiating antimicrobial therapy is crucial for effective UTI management.
  • Antimicrobial therapy should be reserved for cases with clear clinical indications, balancing individual needs with the broader goal of preventing further resistance.
  • Empirical therapy requires careful consideration of prior infections, recent antimicrobial use, and local susceptibility patterns, with reassessment post-culture results.