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Urine Culture
Aka: Urine Culture
- Collection
- Sterile Methods
- Catheterized Urine
- Suprapubic Tap
- Clean Methods
- Clean Catch Urine Collection
- Bag Urine Collection
- Specimen handling
- Volume: 5 ml (0.2 ml minimum)
- First morning void is ideal specimen
- Deliver to lab or refrigerate within 30 minutes
- Interpretation: Clean Voided Specimen
- Normal: <10,000 organisms per ml
- Urinary Tract Infection
- Boys
- Organisms >10,000 per ml suggests UTI likely
- Girls
- Organisms >100,000 per ml suggests UTI
- Three specimens: 95% probability of UTI
- Two specimens: 90% probability of UTI
- One specimen: 80% probability of UTI
- Organisms >10,000 per ml needs repeat Urine Culture
- Interpretation: Transurethral Catheterization
- Normal: <1,000 organisms per ml
- Urinary Tract Infection
- Organisms >10,000 per ml suggests UTI
- Organisms >1,000 per ml needs repeat Urine Culture
- Interpretation: Suprapubic aspiration in infants
- Gram Negative Bacilli: any number suggests UTI (99%)
- Gram Positive Cocci: >1-2,000 suggests UTI (99%)
- References
- Hellerstein (1982) Pediatr Infect Dis 1:271-81 [PubMed]