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Related Experiment Videos

[A study on bacteria within stones in urolithiasis].

T Oka1, T Hara, O Miyake

  • 1Department of Urology, Osaka National Hospital.

Hinyokika Kiyo. Acta Urologica Japonica
|September 1, 1989
PubMed
Summary

Bacteria can reside within urinary stones, undetected by standard urine cultures. This finding highlights a risk of severe urinary tract infections and urosepsis in patients undergoing endourological procedures.

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Area of Science:

  • Urology
  • Microbiology
  • Nephrology

Context:

  • Urinary stone disease affects a significant patient population.
  • The role of bacteria within urinary calculi remains an area of investigation.
  • Current diagnostic methods may not detect all stone-associated infections.

Purpose:

  • To investigate the presence and characteristics of bacteria within urinary stones.
  • To compare bacterial findings within stones to pre-operative urine cultures.
  • To assess the implications of intra-stone bacteria for patient management and surgical risk.

Summary:

  • Bacteria were identified within 5 out of 37 urinary stones analyzed.
  • Of the stones containing bacteria, 4 were classified as infection stones and 1 as non-infection.

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  • Pre-operative urine cultures only detected the same bacterial species (E. coli) in one of four patients with intra-stone bacteria, and antibiotic sensitivities differed.

    • Impact:

    • The presence of bacteria within stones may not be revealed by urine cultures.
    • Patients undergoing endourological procedures (e.g., extracorporeal shock wave lithotripsy, percutaneous nephrolithotripsy) may be at risk of complications.
    • Consideration of intra-stone organisms is crucial to mitigate risks of severe urinary tract infection and urosepsis.