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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
ANTI-STREPTOLYSIN O ANTIBODY (ASO)
Test Code265
Preferred Specimen
Serum 1 mL
NOTE:
Reject Criteria: Gross hemolysis
Methodology: Immunoturbidimetric
Transport Temperature: Room
temperature
NOTE:
Reject Criteria: Gross hemolysis
Methodology: Immunoturbidimetric
Transport Temperature: Room
temperature
Minimum Volume
0.5 mL Serum
Transport Container
Aliquot
Specimen Stability
Room Temperature - 72 Hour(s)
Refrigerated - 5 Day(s)
Frozen - 30 Day(s)
Refrigerated - 5 Day(s)
Frozen - 30 Day(s)
Methodology
Immunoturbidimetric
Setup Schedule
Tue-Sat
Report Available
1 to 3 Day(s)
Limitations
False-positive ASO titers can be due to increased levels of serum beta-lipoprotein produced in liver disease and by "contamination" of serum by Bacillus cereus and Pseudomonas species. ASO is not sensitive for the diagnosis of streptococcal pyoderma.
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.
