Anti Streptolysin O (ASO), Quantitative Test

Anti Streptolysin O (ASO), Quantitative Test

Category
Infection
Sample
Blood sample taken from a vein in your arm
Reports () Terms & Conditions Report time varies with time of sample collection.
In 2 days
Fasting
No Fasting
Age
5+ Years

What Is This Test?

Measures anti-streptolysin O (ASO) antibodies, produced after a streptococcal (strep) throat or skin infection.

Why this test is performed?

Helps diagnose complications of recent strep infection such as rheumatic fever and post-streptococcal glomerulonephritis.

Who should take this test?

Fever, rash, jaundice, suspected exposure to infection, before surgery or pregnancy, as advised by a doctor.

Test Preparation

No fasting needed.

Medical disclaimer · for information only, not medical advice

This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.

In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.

Read our Editorial Policy and Medical Review Process.

Frequently asked questions

Not necessarily. It shows a recent strep infection; your doctor will decide based on symptoms.

No fasting is needed. You can eat and drink normally unless your doctor has advised otherwise.

Blood sample taken from a vein in your arm.

Usually within 13–37 hours after the sample reaches the lab. You will receive the report online.

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