Lab test
Tay-Sachs Disease Testing – Carrier Test
Tay-Sachs Disease Testing – Carrier Test can be ordered without a referral, and this guide covers what to expect. Tay-Sachs Disease Testing identifies if an individual is a carrier or affected by Tay-Sachs disease through a blood test.
What this test is
This test measures levels of the enzyme hexosaminidase A (hex A) in the blood. It helps determine if a person is a carrier of Tay-Sachs disease or if they have the condition. Tay-Sachs is a genetic disorder that affects nerve cells in the brain and spinal cord.
What it measures
- hexosaminidase A (hex A) — reflects enzyme activity related to Tay-Sachs disease
What the test involves
The test involves a standard blood draw, where a sample is collected from a vein in the arm. This sample is then analyzed for hex A enzyme levels.
Why it is often ordered
Clinicians typically order this test for individuals with a family history of Tay-Sachs disease or those in high-risk ethnic groups. It is also used for couples planning to have children to assess carrier status.
Preparation
Preparation instructions should be followed as provided by the testing lab. Always check with the lab for any specific requirements before the test.
How results are reported
Results indicate whether an individual is a carrier or affected by Tay-Sachs disease. Reference ranges for hex A levels vary by laboratory.
Before you go
- Turnaround time for results
- Specific preparation instructions
- Sample collection procedure
FAQ
Frequently asked questions
What is Tay-Sachs disease?
Tay-Sachs disease is a genetic disorder that destroys nerve cells in the brain and spinal cord. It is most commonly seen in infants and can lead to severe developmental issues.
Who should consider Tay-Sachs carrier testing?
Individuals with a family history of Tay-Sachs disease or those belonging to high-risk ethnic groups, such as Ashkenazi Jews, may consider carrier testing.
Can this test diagnose Tay-Sachs disease?
This test can indicate if a person is a carrier or affected by Tay-Sachs disease, but it is not used alone for a definitive diagnosis. Further genetic testing may be needed.
What do I do if I am a carrier?
If you are a carrier, genetic counseling is recommended to discuss potential risks and family planning options. A healthcare provider can guide you through the next steps.
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