TB Gold Test
Learn about the TB Gold Test.
Updated August 27, 2017 By Steve
What is a TB Gold Test?A TB Gold Test is an alternative to the tuberculosis skin test, also known as a PPD. This test is a blood test that looks for prior exposure to tuberculosis by assessing markers in the blood. It is very useful for people who have previously tested positive for the skin test.
How does the TB Gold Test work?The TB Gold Test is an FDA approved test that helps diagnose Mycobacterium tuberculosis infection. This is done by checking for specific proteins present in the microbe that are not present in the BCG vaccine. As a result, this test is good for determining whether positive skin tests were actually true positives or false positives.
What's the procedure for getting a TB Gold Test?The TB Gold Test is a blood test. Because it requires special incubation procedures, it can take as long as 1 week to complete sample processing.
What do TB Gold Test results look like?TB Gold Test results will come back as positive (i.e. concern of exposure to TB) or negative (no prior exposure). Because there are special incubation protocols with the test, a control is usually documented as well to verify accuracy of that particular test. For a helpful video, please check this out: