Tuberculosis Blood Test

Tuberculosis Blood Test

Detect tuberculosis bacteria in the body. This test is for those who have been exposed to tuberculosis bacteria (Mycobacterium tuberculosis); require evidence of a negative tuberculosis test; or are at high risk for contracting tuberculosis. Read more
Test details

Sample type:
You do not need to do anything special to prepare for the sample collection. Fasting is not required for this test.
Test type: In Person
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+ $6.00 Physician Service Fee
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What Icon
Detect Mycobacterium tuberculosis, the bacteria that causes Tuberculosis (TB). This is detected in both active TB and latent TB.
Who Icon
Must be 18+ years of age to purchase.
How Icon
Schedule an appointment, then visit one of the Quest Diagnostics Patient Service Centers
About the Test

This test is an Interferon-Gamma Release Assays (IGRAs) whole-blood test that detects the immune system’s response to M. tuberculosis. M. tuberculosis, or TB bacteria, usually attack the lungs. However, TB bacteria can attack any part of the body such as the spine, kidneys, and brain. In fact, not everyone that becomes infected with TB bacteria will become sick. As a result, two TB-related conditions exist: latent TB infection (LTBI) and TB disease. If not treated properly, TB disease can be fatal. This test does not differentiate between latent tuberculosis infection (LTBI) and active TB disease.

LTBI is a carrier state of TB that can last for weeks, months, or years before developing into TB disease. Active TB is when tuberculosis bacteria overwhelm a person's immune system, and symptoms start to appear. The Tuberculosis Blood Test helps detect the presence of M. tuberculosis and can be a first step in the process of determining is someone has latent TB infection or TB disease. Further testing may be required if the blood test is positive.


How it works


Buy a lab test & schedule an appointment

No doctor visit required for purchase. Book a visit to one of 2000+ Quest locations.


Visit Quest for sample collection


Get fast results online

Access results online as soon as they’re available.


Get physician support

Discuss your results with an independent physician at no extra cost.