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Alias Names: Anti-Streptococcal O Antibodies / Anti-Streptolysin O / ASO
Methodology: Nephelometry (NEPH)
Edit Date: 4/18/2010
Performed: Daily
Released: Same day as tested
CPT Code: 86060
Specimen Collection Details
Collection: One 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube.
Handling: Allow to clot, centrifuge and separate serum from cells within 2 hours. Refrigerate.
Stability: 8 days refrigerated, or 3 months frozen if frozen within 24 hours of collection. Do not allow to thaw.
Standard Volume: 1 mL serum.
Minimum Volume: 0.5 mL serum.
Transport: Refrigerated.
Comments: Streptolysin O is one of several toxic immunogenic exoenzymes produced by group A Beta-hemolytic streptococci. An elevated ASO titer usually is an indication of a recent infection with a group A Beta-hemolytic streptococcus.
Rejection Criteria: Plasma; gross hemolysis; gross lipemia; specimen frozen and thawed more than once.

Reference Range:
<200 IU/mL

PeaceHealth Laboratories