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Anti streptolysin O
Test CodeANTI STREPTOLYSIN O
Alias/See Also
ASO
Chemistry
Chemistry
Preferred Specimen
Gold Top Tube
Minimum Volume
2 mL
Transport Temperature
Refrigerate
Specimen Stability
Room temperature: 2 days
Refrigerated (2-8°C): 2 days
Frozen (-20°C or colder): 6 months
Refrigerated (2-8°C): 2 days
Frozen (-20°C or colder): 6 months
Methodology
Turbidimetric/Immunoturbidimetic
Setup Schedule
M-F
Report Available
TAT 1 - 2 days
Reference Range
0-200 IU/mL
Clinical Significance
This test is a sensitive test for recent streptococcal infection. A rise in ASO begins about one week after infection and peaks two to four weeks later. ASO levels do not rise with cutaneous infections. In the absence of complications or reinfection, the ASO level will fall to preinfection levels within 6 to 12 months. Over 80% of patients with acute rheumatic fever and 95% of patients with acute glomerulonephritis due to streptococci have elevated levels of ASO.
Performing Laboratory
Test performed at West Roxbury Chemistry Lab
Contact: Jonathan Dryjowicz-Burek 857-203-5973
Last Updated: April 3, 2019
