Antistreptolysin O (ASO) Titre

What is Antistreptolysin O (ASO) Titre?

Antistreptolysin O (ASO) titre is a blood test that measures antibodies against streptolysin O, a substance produced by group A Streptococcus bacteria. Elevated ASO titres can indicate a recent streptococcal infection.

Why is the ASO Titre Test Important?

Identifying high levels of ASO antibodies helps diagnose conditions like rheumatic fever and post-streptococcal glomerulonephritis. These conditions can follow untreated streptococcal infections and may require medical attention.

Interpreting ASO Titre Results

Normal ASO titre levels vary by age and laboratory standards. Generally, elevated ASO levels suggest a recent strep infection. However, clinical correlation and additional tests are essential for an accurate diagnosis.