what is a tb test
What is a TB blood test? The tuberculosis (TB) blood test, also called an Interferon Gamma Release Assay or IGRA, is a way to find out if you have TB germs in your body. The TB blood test can be done instead of a TB skin test (Mantoux). There are two kinds of TB blood tests: 1  QuantiFERONÂ®-TB.  T-SPOTÂ®.TB.