Urinary tract infection

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Background

  • Bacterial infection of the urinary tract, either lower (cystitis) or upper (pyelonephritis)
  • When UTI causes sepsis syndrome, often referred to as urosepsis

Microbiology

Clinical Manifestations

  • Diagnostic criteria include clinical and laboratory symptoms:
    • Two or more clinical symptoms:
      • Fever > 38ºC
      • Urinary urgency or frequency
      • Acute dysuria
      • Hypogastric pain
      • Costovertebral angle tenderness
    • One or more laboratory finding:
      • Bacteriuria (> 100,000 CFUs/mL)
      • Pyuria (>10 WBCs/HPF)

Investigations

  • Urinalysis has high NPV (~100%) if negative for leukocyst esterase and nitrites