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Related Experiment Videos

Prostatitis--the Japanese viewpoint.

S Arakawa1, T Matsui, K Gohji

  • 1Department of Urology, Kobe University School of Medicine, Japan.

International Journal of Antimicrobial Agents
|July 8, 1999
PubMed
Summary
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Japanese researchers defined objective criteria for bacterial prostatitis diagnosis. Acute bacterial prostatitis requires 10^4 cfu/ml bacteria and 10 WBCs/hpf in urine. Chronic bacterial prostatitis has different bacterial count thresholds and requires analysis of expressed prostatic secretions (EPS) or urine sediment.

Area of Science:

  • Urology
  • Microbiology

Background:

  • Bacterial prostatitis diagnosis lacks standardized objective criteria.
  • Understanding specific bacterial counts and inflammatory markers is crucial for accurate diagnosis and treatment.

Purpose of the Study:

  • To outline the Japanese inclusion criteria for diagnosing acute and chronic bacterial prostatitis.
  • To present findings on bacterial biofilm formation in chronic prostatitis cases.

Main Methods:

  • Defined bacterial count thresholds (cfu/ml) and white blood cell (WBC) counts per high-power field (hpf) in urine samples (VB1, VB2) and expressed prostatic secretions (EPS) or urine sediment (VB3).
  • Utilized electron microscopy to investigate bacterial biofilm formation in prostatic tissues of patients with intractable chronic prostatitis.

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Main Results:

  • Objective criteria for acute bacterial prostatitis: bacterial count ≥10^4 cfu/ml and ≥10 WBCs/hpf in VB1 or VB2.
  • Criteria for chronic bacterial prostatitis: bacterial count ≥10^3 cfu/ml (or ≥10^4 cfu/ml for Gram-positive cocci) and ≥10 WBCs/hpf (including macrophages) in EPS or VB3.
  • Bacterial biofilm formation was observed in prostatic tissues of 3 out of 12 patients with intractable chronic prostatitis.

Conclusions:

  • Established clear, objective diagnostic criteria for acute and chronic bacterial prostatitis in Japan.
  • Highlighted the potential role of bacterial biofilms in refractory chronic prostatitis, suggesting a target for future therapeutic strategies.