TB Gold, also known as QuantiFERON-TB Gold, is a blood test that helps diagnose tuberculosis (TB) infection. It's a simple test that analyzes the blood for interferon-gamma (IFN-γ), a substance released by the immune system when it detects Mycobacterium tuberculosis, the bacteria that causes TB.
The test is helpful in determining:
- Whether a person is infected with TB: A positive test indicates that the individual has been infected with Mycobacterium tuberculosis.
- If TB infection is latent or active: While the test doesn't distinguish between active and latent TB, it helps healthcare providers make informed decisions based on other factors.
- If the person needs further investigation: A negative result suggests no TB infection; however, it's recommended to repeat the test for individuals with a high suspicion of exposure.
TB Gold is a valuable tool in screening individuals for TB infection, especially those at high risk, such as healthcare workers, individuals with a history of TB exposure, and people with weakened immune systems.
It's important to note:
- TB Gold is not a diagnostic test for active TB disease. It only helps determine if the individual is infected with the bacteria.
- Further tests, such as chest X-ray and sputum culture, are needed to diagnose active TB disease.
