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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Strep. pneumoniae Ag, Urine

Test Code(s): SPAG / GM4545

CPT Code(s): 87449

Methodology: Immunochromatographic Assay

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.

Specimen Requirements

Specimen: Random urine

Collection Container: Preferred: Sterile screw cap container

Collection Volume: Preferred: 2 mL
Pediatrics: 0.5 mL

Sample Analyzed: Urine aliquot

Volume Required: Preferred: 2 mL
Pediatrics: 0.5 mL

Specimen Transport: Transport specimen to UWHC Core Laboratory (B4/220) immediately. Transport with coolant pack if coming from outreach location.

Unacceptable Criteria: Urine samples on children less than 5 years old are not acceptable for this method.

Stability: Ambient: 24 hours
Refrigerated: 2 weeks
Frozen: 2 weeks


Expected Results:


Additional Information:

Pneumococcal antigenuria can persist for six weeks following an episode of pneumococcal pneumonia. Pneumococcal vaccine can give a positive test for up to five days following immunization. The accuracy of the Binax NOW test in urine has not been proven in children under 5 years of age. Requests for Strep. pneumoniae Ag on urine should not be made for this age population.

strep pneumococcal

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