The ASO, or anti-streptolysin reaction, is a test that determines the presence of antibodies to the extracellular antigen of group A streptococcus, or streptolysin O, in the human body.
ASO test - Symptoms and course
Elevated ASO values are considered to be at least 250 units in adults or at least 333 units in children over 5 years of age. Significantly elevated or NACRSTING ASO titres in subsequent tests confirm a history of group A Streptococcus pyogenes infection.
Because of the possibility of complications following infection with this type of streptococcus (such as rheumatic fever or glomerulonephritis), ASO titres are a sensitive marker of correct and effective treatment of streptococcal infection.
When to go to the doctor and treat
Consult your GP or paediatrician if your child is found to have an elevated ASO titer, especially if it relates to recent tonsillitis. It is important to remember that an elevated ASO titre cannot be the only criterion for the diagnosis of complications of streptococcal infection, but is only a test to support the diagnosis. The most important criterion for deciding on the type of treatment needed is the analysis of the clinical symptoms present in the child and the evaluation of the evolution of the ASO titer at specific intervals.
ASO test - Treatment
There is no home treatment.