Test name
- ქართულად
- ანტისტრეპტოლიზინი O
- English
- Antistreptolysin O
- Abbreviation
- ASO / ASLO
What does the test measure?
Measures antibodies to a toxin of group A streptococcus.
Why is it ordered?
To assess the immune response to a past streptococcal infection.
How should I prepare?
- Check in advance whether you need to fast or have your blood drawn at a specific time.
- Not every biochemistry test needs special preparation. Check whether fasting is required for your specific order.
- Before the blood draw, avoid unusually intense physical exercise unless your doctor has advised otherwise.
- Tell your doctor and the laboratory staff about any medicines and dietary supplements you take.
Do I need to fast?
Fasting is usually not required. If other tests have been ordered at the same time, follow the preparation they require.
When should the test be done?
A specific time is generally not required. If your doctor has set a different time, follow those instructions.
What can affect the result?
- Food, hydration or physical exercise, depending on the specific analyte
- Certain medicines or dietary supplements
- Hemolysis and delayed sample processing
Which sample is needed?
Venous blood — serum or plasma, depending on the method
How is the sample collected and stored?
The blood sample is collected by a qualified staff member. The tube type, required volume, and processing and storage conditions are set by the laboratory's specific method. You do not need to store the sample yourself.
What does the result mean?
Elevated ASO may reflect an immune response to a past streptococcal infection and does not by itself diagnose an acute throat infection.
When should I see a doctor?
If your result is outside the reference interval, you have symptoms, or your condition changes, contact your doctor. If symptoms are severe or develop quickly, seek emergency care.
Important warnings and recommendations
Do not stop treatment on your own. Confirm the final test conditions with the laboratory.