2 hours
Test Updated:
Antistreptolysin O Antibody
ASLO
ASO
ASO (Anti-Streptolysin O)
Streptolysin O Antibodies
ANTI-STREPTOLYSIN O
Looking to order a test?
We’ve provided helpful links to make ordering easy.
Find a RequisitionAll specimens should be accompanied by a requisition.
Submitting SpecimensLearn about how to properly label and where to ship specimens.
Order Kits and SuppliesMLabs provides all the supplies necessary for the collection of specimens.
Test FAQVisit our provider FAQ and learn about common questions to ordering tests.
Test Overview
Immunoturbidimetric
Document exposure to group A streptococcal antigen, particularly streptolysin O. A marked rise or persistently elevated level indicates that a focus of streptococcal infection or poststreptococcal sequelae is present. Over 80% of patients with acute rheumatic fever and over 95% of patients with acute glomerulonephritis have elevated ASO levels.
< 5 years: 0-99 IU/ml; 5-15 years: 0-249 IU/ml; Adult: 0-199 IU/ml
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Specimen Requirements
Collect specimen in an SST tube. Cause for Rejection: Grossly lipemic (triglyceride levels greater than 900 mg/dl)samples are not recommended for analysis.
Collect specimen in an SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate up to 48 hours or freeze for longer storage.
