ASO - Titer (Anti Streptolysin O Titres)

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The ASO Titer test measures antibodies against streptolysin-O to detect recent or past Group A streptococcal infection.

₹300.00 ~~₹600.00~~

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Test Details

Also Known As

ASO Titer Test, Anti-Streptolysin O Antibody, ASOT, Streptolysin O Antibody Test, Anti-Strep O Test

Sample Type

Blood

Gender

Male, Female

Age Group

All Ages

Pathology

Test Code

The ASO – Titer (Anti-Streptolysin O) test estimates the level of antibodies produced by the immune system in response to streptolysin-O, a toxin released by Group A Streptococcus.
Rising or elevated ASO titers indicate a recent streptococcal infection, even if the initial throat or skin infection has resolved. This test is particularly useful in evaluating post-streptococcal complications such as rheumatic fever, post-streptococcal glomerulonephritis, and reactive arthritis.
ASO levels typically rise 1–3 weeks after infection, peak at 3–5 weeks, and gradually decline over months. Results should always be interpreted along with clinical findings and other inflammatory markers.

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Frequently Asked Questions

It is used to detect recent streptococcal infection and diagnose post-streptococcal complications.

Not necessarily. It usually indicates a recent past infection rather than an ongoing one.

ASO levels rise 1–3 weeks after infection and peak within 3–5 weeks.

No fasting is required.

Yes. Some skin infections may not significantly raise ASO levels.

No. It is interpreted along with symptoms, ESR, CRP, and other clinical findings.

ASO - Titer (Anti Streptolysin O Titres)