ASO Titer
Alternate Names : Anti-Streptolysin O Titer
Definition This is a blood test to measure anti-streptolysin O (ASO) antibodies.
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Why is the Test Performed?
This test is used to detect prior infection by Group A Streptococcus, the bacterium responsible for diseases such as glomerulonephritis, rheumatic fever, bacterial endocarditis, and scarlet fever.
ASO testing demonstrates the presence of antibodies generated by the body against the enzyme streptolysin O, which is produced by the bacteria and which causes destruction of red blood cells. The ASO antibody may be detected in the blood for weeks or months after the primary infection has been eradicated.
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