ASO (Antistreptolysin O)
ASO is an antibody to streptococcus. It rises after a streptococcal infection and is used to confirm one.
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Normal ranges
Adults: up to 200 IU/mL.
Units: IU/mL
Causes of deviations
Low levels:
Usually has no meaning.
High levels:
Recent streptococcal infection, rheumatic fever, glomerulonephritis.
When to see a doctor
If it is raised, discuss it with your doctor.
Related biomarkers
Conditions
Streptococcal infection
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