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Lab Dept:
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Chemistry
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Test Name:
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ASO (ANTISTEPTOLYSIN O)
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General Information
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Lab Order Codes:
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ASO
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Synonyms:
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Antistreptolysin-O (ASO) Quantitative
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CPT Codes:
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86060 – Antistreptolysin O; titer
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Test Includes:
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Antistreptolysin O concentration reported in IU/mL. If anti-DNase B is also desired, see Streptococcal Antibodies
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Logistics
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Test Indications:
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Antistreptolysin O (ASO) titers are used to diagnose current versus past infections with group A streptococci. The test detects antibodies to Streptolysin O, one of the many streptococcal antigens. In addition, it may be used to help diagnose rheumatic fever.
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Lab Testing Sections:
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Chemistry (all specimens analyzed on the Mpls campus)
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours
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Turnaround Time:
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1 – 4 days, testing performed Tuesday, Wednesday and Friday
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Special Instructions:
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N/A
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Specimen
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Specimen Type:
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Blood
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Container:
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Red top (plain, no gel) tube
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Draw Volume:
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2 mL (Minimum: 0.6 mL) blood
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Processed Volume:
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0.6 mL (Minimum: 0.2 mL) serum
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Collection:
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Routine venipuncture
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Special Processing:
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Lab Staff: Centrifuge specimen, remove serum aliquot into a plastic sample cup. Store at refrigerated or frozen temperatures. Specimens sent from the STP campus to the Mpls campus should be transported on ice.
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Patient Preparation:
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None
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Sample Rejection:
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Mislabeled or unlabeled, specimens other than serum, turbid samples that do not clear after centrifugation
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Interpretive
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Reference Range:
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<200 IU/mL
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Critical Values:
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N/A
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Limitations:
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N/A
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Methodology:
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Nephelometry
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References:
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Dade Behring Corp., N Latex ASL Package Insert, Marburg, Germany, April 2008
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