Description
Available in Visakhapatnam only.
Sample Required:
A blood sample is required for the IGRA test.
Test Time:
Results are usually available within a few days, depending on the laboratory’s processing time.
Test Normal Range:
The IGRA test measures the amount of interferon-gamma (IFN-gamma) released in response to specific tuberculosis (TB) proteins. Interpretation depends on the amount of IFN-gamma produced and risk factors.
What is the Test:
The IGRA test is used to detect a person’s immune response to TB proteins. It helps diagnose latent TB infection or TB disease.
Test Procedure:
A vein in your arm is used to extract a blood sample. The blood sample is processed in a laboratory. The amount of interferon-gamma released in response to TB proteins is measured.
When to Take the Test:
The IGRA test is recommended when there is suspicion of TB infection or as part of routine TB screening. It may also be used when the Mantoux Tuberculin Skin Test (TST) results are inconclusive or when the TST cannot be administered.
Who Should Take This Test:
Individuals at risk for TB, including healthcare workers, close contacts of TB patients, and those with specific risk factors. Individuals who may have difficulty returning for a TST reading or have had an inconclusive TST result.
Precautions for Exceptional Cases (Pregnancy, etc.):
Pregnancy: The IGRA test is generally considered safe during pregnancy. However, the decision to test pregnant individuals should be made in consultation with a healthcare provider, weighing the potential benefits and risks.
FAQs (Frequently Asked Questions):
Q1: What is the difference between the IGRA test and the Mantoux Tuberculin Skin Test (TST)?
A: The IGRA test measures the immune response to TB proteins in a blood sample, while the TST involves injecting a substance under the skin. Both tests are used to detect TB infection.
Q2: Can the IGRA test differentiate between latent TB infection and active TB disease?
A: No, it cannot. A positive IGRA result indicates exposure to TB or TB infection, but additional tests are needed to determine if the infection is latent or active.
Q3: Are there any medications or conditions that can affect IGRA test results?
A: Some medications and medical conditions may affect IGRA results. ItIt is critical to inform your healthcare practitioner of any medications you are taking or medical conditions you are suffering from.
Q4: Is the IGRA test more accurate than the TST?
A: Both tests have their advantages and limitations. The choice between the IGRA test and the TST depends on individual circumstances and risk factors.
Q5: What should I do if I have a positive IGRA result?
A: A positive IGRA result indicates exposure to TB or TB infection. Further evaluation, such as a chest X-ray and possibly treatment, may be needed to determine if the infection is latent or active. Consult with a healthcare provider for guidance.
