Description
Serum, Antistreptolysin O (ASO) test determines antibodies in the blood against streptolysin O, an enzyme produced by group A streptococcus bacteria. This is also helpful in checking whether the certain condition or disease is due to a recent streptococcal infection. Anti-Streptolysin O test is now available at an affordable cost, with the free home collection., Non Fasting
Sample Required:
The Anti-Streptolysin O (ASO) test requires a blood sample. A healthcare professional will collect the sample by performing a simple blood draw from a vein in your arm.
Test Time:
The test time for an ASO test may vary depending on the laboratory and specific factors. Typically, the results are available within a few hours to a day.
Test Normal Range:
The normal range for ASO levels can vary depending on the specific laboratory and testing methods used. It’s important to consult with your healthcare provider for the interpretation of your specific test results.
What is the test?
The Anti-Streptolysin O (ASO) test is a blood test that measures the levels of antibodies called anti-streptolysin O in the bloodstream. These antibodies are produced by the immune system in response to a previous infection by the bacterium Streptococcus pyogenes, which can cause conditions such as strep throat and certain post-infectious complications.
Test Procedure:
During the ASO test, a healthcare professional will collect a blood sample from your arm using a needle. The blood sample is then sent to a laboratory for analysis. In the laboratory, the sample is tested for the presence and level of anti-streptolysin O antibodies.
When to take the test:
The ASO test is typically performed when a healthcare provider suspects a recent or past Streptococcus pyogenes infection. It may be ordered to confirm a diagnosis of certain streptococcal infections or to monitor the response to treatment. The test is usually performed several weeks after the initial infection, as it takes time for the antibody levels to rise.
Who should take this test:
The ASO test is commonly ordered for individuals who have had symptoms of a Streptococcus pyogenes infection, such as sore throat, fever, or skin infections. It may also be performed if there are concerns about post-infectious complications, such as rheumatic fever or glomerulonephritis. Your healthcare provider will determine if this test is appropriate based on your specific symptoms and medical history.
Precautions for exceptional cases (pregnancy, etc.):
For pregnant women or individuals with specific medical conditions, additional considerations and specific blood tests may be recommended. It is important to inform your healthcare provider about any specific medical conditions, medications, or pregnancy before undergoing the ASO test.
FAQs for Anti-Streptolysin O (ASO) Test:
Q1: Can the ASO test detect a current streptococcal infection?
A: No, the ASO test is primarily used to detect a previous streptococcal infection. It measures the levels of antibodies produced by the immune system in response to the infection. To diagnose a current streptococcal infection, other tests such as a throat culture or rapid strep test are usually performed.
Q2: Are there any risks or complications associated with the ASO test?
A: The ASO test is a simple blood draw and generally safe. Some individuals may experience mild discomfort or bruising at the needle insertion site. Rarely, there may be a small risk of infection or excessive bleeding. These risks are minimal and usually resolve quickly.
Q3: How long does it take for ASO levels to rise after a streptococcal infection?
A: It typically takes several weeks for ASO levels to reach detectable levels after a streptococcal infection. This is why the test is usually performed several weeks after the initial infection to allow sufficient time for the antibody response to develop.
Q4: Can medications or recent vaccinations affect ASO test results?
A: Yes, certain medications and recent vaccinations can potentially affect ASO test results. It’s important to inform your healthcare provider about any medications or vaccinations you have taken before the test to ensure accurate interpretation of the results.
Q5: What can high ASO levels indicate?
A: High ASO levels suggest a previous streptococcal infection. Elevated levels may be seen in conditions such as strep throat, scarlet fever, rheumatic fever, and post-streptococcal glomerulonephritis. However, it’s important to note that ASO levels can also be influenced by various factors, and the results should be interpreted by a healthcare professional in conjunction with other clinical information.
