ANTI STREPTOLYSIN - O QUANTITATIVE (ASO) TITRE

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The Anti Streptolysin O Quantitative (ASO) Titre test is a blood test that measures the exact level of Anti Streptolysin O (ASO) antibodies produced by the immune system in response to a recent Group A Streptococcus bacterial infection. Unlike a qualitative test, the quantitative ASO titre provides a precise antibody measurement, helping doctors assess the severity and progression of the immune response.

This test is commonly recommended for patients with symptoms or complications that may occur after a streptococcal infection, such as rheumatic fever, joint pain, kidney inflammation (post-streptococcal glomerulonephritis), or persistent sore throat. The ASO titre helps doctors confirm a recent streptococcal infection, monitor antibody levels over time, and support diagnosis when interpreted alongside clinical findings and other laboratory investigations.

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Anti Streptolysin O Quantitative (ASO) Titre Test –

What is the Anti Streptolysin O Quantitative (ASO) Titre test?

The ASO Quantitative (ASO Titre) test measures the exact level of Anti Streptolysin O antibodies in the blood to help detect a recent Group A Streptococcus bacterial infection.

Why is the ASO Quantitative test performed?

This test is used to help diagnose complications of streptococcal infections, such as rheumatic fever, post-streptococcal glomerulonephritis, and other inflammatory conditions.

Do I need to fast before the ASO Quantitative test?

No. Fasting is generally not required before the ASO Quantitative (ASO Titre) test unless your doctor advises otherwise.

What does a high ASO titre indicate?

A high ASO titre usually indicates a recent streptococcal infection. It helps doctors evaluate the body’s immune response and monitor recovery or disease progression.

How is the ASO Quantitative test performed?

The test requires a small blood sample collected from a vein in your arm. It is a quick, safe, and minimally invasive procedure.

Can the ASO Quantitative test confirm an active streptococcal infection?

No. The test indicates a recent immune response to a streptococcal infection but does not confirm an active infection. It is interpreted along with clinical symptoms and other laboratory tests.

Anti Streptolysin O Quantitative (ASO) Titre Test

Introduction:

Measures the exact level of Anti Streptolysin O (ASO) antibodies in the blood.
Helps detect a recent Group A Streptococcus bacterial infection.
Performed using a simple blood sample.
Supports the diagnosis of post-streptococcal complications.
Commonly used alongside clinical evaluation and other laboratory tests.

Purpose of the Test:

Detect a recent streptococcal infection.
Help diagnose rheumatic fever.
Assess post-streptococcal glomerulonephritis.
Monitor ASO antibody levels over time.
Support diagnosis of autoimmune and inflammatory complications.

Symptoms:

Normal Range:

Usually less than 200 IU/mL in adults (may vary by laboratory).
Children may have slightly different reference ranges.
Normal values depend on the testing method used.
Results should be interpreted by a healthcare professional.
Always compare with the laboratory's reference range.

Clinical Significance:

Elevated levels indicate a recent streptococcal infection.
Helps diagnose rheumatic fever.
Assists in identifying kidney complications after infection.
Supports monitoring of antibody response.
Used with other clinical findings for accurate diagnosis.

Importance:

Enables early detection of post-streptococcal complications.
Helps guide timely medical treatment.
Assists doctors in monitoring disease progression.
Improves diagnostic accuracy when combined with other tests.
Supports better patient management and follow-up care.

Instructions:

Fasting is generally not required.
Inform your doctor about any medications you are taking.
Stay well-hydrated before the blood sample is collected.
Follow any specific instructions provided by your healthcare provider.
Consult your doctor for proper interpretation of the test results.

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