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ASO
Also known as: ASLO Formal name: Antistreptolysin O Related tests: Strep throat
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The Test Sample
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What is being tested?This test measures the amount of antibody produced in response to a recent streptococcal infection. Streptolysin O is a toxin made by the Group A streptococcus bacteria ( Streptococcus pyogenes). Antibodies made against this foreign toxin are known as antistreptolysin O (ASO) antibodies, which appear in the blood following infection.
How is the sample collected for testing?
A blood sample is obtained by inserting a needle into a vein in the arm.
NOTE: If undergoing medical tests makes you or someone you care for anxious, embarrassed, or even difficult to manage, you might consider reading one or more of the following articles: Coping with Test Pain, Discomfort, and Anxiety, Tips on Blood Testing, Tips to Help Children through Their Medical Tests, and Tips to Help the Elderly through Their Medical Tests.
Another article, Follow That Sample, provides a glimpse at the collection and processing of a blood sample and throat culture.
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This article was last reviewed on
January 30, 2006.
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