Laboratory test
Antistreptolysin O (ASO)
Test code · БХ.025
ASO consists of antibodies to streptolysin O, a substance produced by certain streptococci. The test helps assess the immune response following a streptococcal infection.
- Specimen
- Blood serum
- Turnaround time
- 1–2 days
Collection points for the selected city
About the test
ASO consists of antibodies to streptolysin O, a substance produced by certain streptococci. The test helps assess the immune response following a streptococcal infection. It is used when the doctor suspects a link between current symptoms and a previous infection, for example when assessing certain post-streptococcal complications. Antibodies do not appear immediately and may persist after the infection has resolved.
An elevated ASO does not prove an active infection and is not, on its own, a reason to prescribe an antibiotic. Other diagnostic approaches are used for an acute sore throat. The doctor assesses the result together with symptoms, medical history and other investigations. The reference values of the individual laboratory are used for comparison, and changes over time are considered during follow-up.
Why it is ordered
- Assess signs of previous exposure to streptococci.
- Complement investigation of post-streptococcal complications.
How to prepare
Before taking the test, check the preparation and specimen collection requirements with the laboratory. Tell your doctor about medicines and recent treatment. Do not stop prescribed medicines on your own.
Where to have the test
All collection pointsCheck whether the test can be taken at your chosen collection point.
Happy Clinic
Rasul Dent
We will help you prepare for your visit
We will answer questions about services and the testing process.