Infectious Disease
Also known as: TB blood test, Interferon Gamma Release Assay, IGRA
If you have symptoms like a cough lasting more than 3 weeks, chest pain, coughing up blood, fever, night sweats, or unexplained weight loss, contact your clinician immediately. These could be signs of active TB disease.
This test checks how your body's defense system responds to certain parts of the germs that cause tuberculosis. It helps doctors find out if you have been infected with these TB germs.
Your doctor orders this test to see if you have TB germs. This is especially true if you have been near someone with TB. It is also true if you have a higher chance of getting TB.
Reference ranges for this test can vary by the laboratory performing the analysis. The interpretation also depends on your age, health status, and other clinical factors.
Clinical Reference
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Educational purposes only — This information is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your lab results with your healthcare provider.