Antistreptolysin O Antibody
ASO (Anti-Streptolysin O)
Streptolysin O Antibodies
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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.