ASO Titre (Anti streptolysin O)

Synonyms

   DNA Streptococcal Antibody

Clinical Significance

   It is useful for Demonstration of acute or recent streptococcal infection.

Specimen

   Serum

Stability

   Refrigerated (preferred) : 28 days

   Frozen : 28 days

   Ambient : 7 days

Reference Range

   0 - 200 IU/ml

Interpretation

   Elevated values are consistent with an antecedent infection by group A streptococci.

Limitation

   False-high titers may be obtained with sera that are contaminated by certain bacterial organisms during shipment or storage and in patients with liver disease where the presence of high lipoprotein concentrations in the serum may mimic antibody activity.