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HelpTest Code ASO Antistrep-O Titer, Serum
Reporting Name
Antistrep-O Titer, SPerforming Laboratory
Mayo Clinic Laboratories in Rochester
Useful For
Demonstration of acute or recent streptococcal infection
Method Name
Nephelometry
Ordering Guidance
Patients with acute glomerulonephritis following skin infection (post-impetigo) have an attenuated immune response to streptolysin O. For these patients, performance of an alternative streptococcal antibody test such as ADNAS / Anti-DNase B Titer, Serum is recommended.
Specimen Required
Patient Preparation: Fasting preferred but not required
Supplies: Sarstedt 5 mL Aliquot Tube (T914)
Collections Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions: Centrifuge and aliquot serum into plastic vial.
Specimen Type
SerumSpecimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 28 days | |
| Frozen | 28 days | ||
| Ambient | 7 days |
Reject Due To
| Gross hemolysis | OK |
| Gross lipemia | Reject |
| Gross icterus | OK |
Reference Values
<5 years: ≤70 IU/mL
5-17 years: ≤640 IU/mL
≥18 years: ≤530 IU/mL
Interpretation
Elevated values are consistent with an antecedent infection by group A streptococci.
Day(s) Performed
Monday through Friday
Report Available
1 to 3 daysTest Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
86060
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| ASO | Antistrep-O Titer, S | 5370-2 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| ASO | Antistrep-O Titer, S | 5370-2 |