Urinary tract infection: Difference between revisions

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= Definition =
== Definition ==


* Bacterial infection of the urinary tract, either lower (cystitis) or upper (pyelonephritis)
* Bacterial infection of the urinary tract, either lower (cystitis) or upper (pyelonephritis)
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*** Pyuria (>10 WBCs/HPF)
*** Pyuria (>10 WBCs/HPF)


= Etiology =
== Etiology ==


* Typical organisms include:
* Typical organisms include:
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** S. saprophicitus
** S. saprophicitus


= Investigations =
== Investigations ==


* Labs
* Labs

Revision as of 15:31, 17 August 2019

Definition

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

Etiology

  • Typical organisms include:
    • E. coli
    • S. saprophicitus

Investigations

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