Understand the Antistreptolysin O Titer and Its Significance

Understand the Antistreptolysin O Titer and Its Significance

Whenever your body is exposed to harmful bacteria, it naturally produces antibodies to defend itself. In the case of a Group A Streptococcus (GAS) infection, the bacteria release a toxin known as Streptolysin O and in response, your immune system produces a specific antibody called Antistreptolysin O (ASO) to neutralise it. The ASO titer is a blood test that measures the level of these antibodies in your bloodstream. Read on to know more about this test.

What is Antistreptolysin O Titer?

The antistreptolysin O (ASO) titer test is a diagnostic procedure (blood test) that measures the level of antibodies against streptolysin O, a toxin produced by Group A Streptococcus (GAS) bacteria. It is to determine if the person have had a recent Streptococcus infection.