Spectrum: Local Antimicrobial Stewardship, for Yangon Children's Hospital

Urine Culture

Probability of Infection by Method of Collection

Suprapubic aspiration
Colony count/ml (pure culture) Probability of infection (%)
Gram-negative bacilli: any number OR gram-positive cocci: >10³ >99%

Transurethral catheterization
Colony count/ml (pure culture) Probability of infection (%)
>10⁵ 95%
≥5x10⁴ to ≤10⁵ Infection likely
10³ to <5x10⁴ Suspicious, repeat
<10³ Infection unlikely

Clean void (boy)
Colony count/ml (pure culture) Probability of infection (%)
>10⁴ Infection likely

Clean void (girl)
Colony count/ml (pure culture) Probability of infection (%)
3 specimens ≥10⁵ 95%
2 specimens ≥10⁵ 90%
1 specimen ≥10⁵ 80%
5x10⁴ to 10⁵ Suspicious, repeat
10⁴ to 5x10⁴ Symptomatic: suspicious, repeat
<10⁴ Asymptomatic: infection unlikely

Criteria from the American Academy of Pediatrics, 2011

Note

The following should be considered intermediate and should be repeated:

  • Significant growth of 2 pathogens

  • A predominant pathogen with a contaminant

  • Intermediate growth of a single pathogen

Contamination rate of urine obtained by the following methods are:

  • Bag specimen: 62.8%

  • Catheterization: 9.1%