Measures ASO antibodies used to review recent streptococcal infection response.
Download Anti Streptolysin - O (aso) Test Visual Guide infographic (PNG)
| Result context | Guide |
|---|---|
| Lower | less supportive |
| Raised | recent strep context |
| Trend | paired sample may help |
ASO indicates immune response and does not prove current throat infection by itself.
Anti Streptolysin - O (aso) is a laboratory test that measures a result in a Blood (Serum) sample. It may be ordered to investigate symptoms, support a diagnosis or monitor a condition, depending on your clinician's advice.
The current booking price is shown at Rs. 606 against an MRP of Rs. 710, inclusive of taxes where applicable.
No fasting is required for this test alone. If another test in the same order requires fasting, follow its preparation instructions. Home sample collection is available in serviceable cities. A trained phlebotomist collects the sample using sterile equipment, and the report is shared online after processing.
Reference ranges vary by laboratory and method. Use the range printed on your final report. The information below is educational only.
| Measure | Typical guide | Note |
|---|---|---|
| Result unit | IU/mL | Use the reference range printed on your final report. |
| High ASO | Above lab cut-off | May suggest recent group A strep exposure. |
| Trend use | Repeat titre | Rising or falling values may be more useful than one result. |
| Reason | Description |
|---|---|
| Strep exposure marker | Measures antibodies to streptolysin O. |
| Post-strep review | Used when rheumatic fever or kidney inflammation is suspected. |
| Symptom support | Helps connect current symptoms with earlier strep infection. |
| Situation | Description |
|---|---|
| Symptoms/context | Joint pain, fever, rash, swelling, urine changes after sore throat. |
| Risk context | Recent throat or skin infection. |
| Follow-up users | People being evaluated for post-streptococcal complications. |
| Topic | Guidance |
|---|---|
| Fasting | No fasting is required for this test alone. If another test in the same order requires fasting, follow its preparation instructions. |
| Timing | Antibodies rise after infection, not immediately. |
| Interpretation | ASO is not a throat infection culture. |
Home sample collection for Anti Streptolysin - O (aso) is available in the cities below, subject to confirmation of your pincode at booking.
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General testing guide 
General testing guide 
General testing guide 
General testing guide Your sample is collected by a trained phlebotomist and sent to the partner laboratory for analysis. The laboratory processes the sample using its validated procedures and quality controls. Your final report shows the result, unit and reference range used for that test. Discuss an unexpected or abnormal result with your clinician.
