The Anti-Streptolysin O (ASO) Titre – Titration test at Pamel Laboratories is a specialized blood test that measures the level of ASO antibodies produced by the body in response to an infection with group A Streptococcus bacteria. This test is essential for diagnosing recent or past streptococcal infections that may lead to complications such as rheumatic fever, glomerulonephritis, or post-streptococcal arthritis.
Using the titration method, this test provides a quantitative measurement of ASO levels in International Units per milliliter (IU/mL) to help assess the severity and timing of the infection.
What the Test Detects:
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Measures the concentration of ASO antibodies in the blood
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Indicates a recent or ongoing immune response to Streptococcus pyogenes infection
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Helps evaluate streptococcal involvement in non-suppurative complications
Purpose of the Test:
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Diagnose post-streptococcal complications such as:
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Assess history of recent streptococcal throat or skin infection
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Monitor antibody response over time (paired samples may be requested)
Sample Type: Blood sample (serum)
Turnaround Time: 24–48 hours
Interpretation:
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Elevated ASO titre suggests a recent streptococcal infection
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Very high titres may point to complication risk
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ASO levels may remain elevated for weeks to months after infection
