Description

• The antistreptolysin O (ASO) titer test is a blood test that checks for a strep infection. When you come into contact with harmful bacteria, your body produces antibodies to defend itself against these bacteria. Your body produces antibodies specific to the bacteria they fight.
• The ASO titer test can help your doctor determine if you recently had a strep infection by measuring the presence of antistreptolysin antibodies in your blood.