ASO Titer

The ASO blood test checks the anti-streptolysin O antibody titer level.

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What is an ASO titer?

The ASO test is a blood test that checks the ASO, or Anti-Streptolysin O Antibody, titer level.

Why is an ASO titer important?

The ASO titer is a blood test that helps identify a streptococcal infection. ASO titer levels rise 1 week after an infection and peak 2-4 weeks later.

How reliable is an ASO titer?

The ASO titer is considered sensitive for most streptococcal infections (not streptococcal pyoderma). False-positive levels can occur in people with liver disease of when the serum accidentally gets contaminated by B. cereus or Pseudomonas.

What type of specimen will I submit?

This ASO Titer is a blood test.

Do I need to fast to take this test?

Fasting is not necessary.

How long does it take to get test results?

It typically takes 6 business days or less.

Accesa Labs does not provide medical advice, diagnosis or treatment. All users should consult with a medical provider for specific health concerns.

Last updated on November 13, 2017

ASO Titer for $112

ASO Blood Test - More Information

The ASO titer, also known as an ASO blood test, ASLO lab test and an anti-streptolysin O antibody titer, measures the ASO antibody blood levels.

The ASO test is useful for detecting prior exposure to Streptococcus group A, and some group C and G, bacteria. When one of these forms of the bacteria cause an infection in the body, the immune system produces ASO antibodies in the blood to help fight the infection. The presence of ASO blood antibodies suggest an infection and should be correlated to actual symptoms as some people with positive ASO titers are without symptoms. As a sensitive test for recent infections due to streptococcus, ASO antibody levels rise approximately seven days after an infection and peak over the following three weeks, typically disappearing within twelve months if a recurrent infection does not take place.

The ASO blood test is positive in the majority of cases of acute rheumatic fever and also glomerulonephritis in the kidney from streptococci. It is also used in attempting to diagnosis scarlet fever. The streptolysin-O antibody titer can be falsely elevated in the setting of liver disease and concurrent infections with B. cereus or Pseudomonas.

Getting an ASO test near you is a straightforward process. Simply order online and get tested at the Quest Diagnostics lab that you selected. Once your ASO lab results are ready, they will be available for download. As can be seen on the sample ASO lab report above, the anti-streptolysin O blood levels will be reported as a number and can be compared against the reference range provided by the lab. No fasting is necessary prior to getting this ASO titer lab test.

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