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What is a TB GOLD INTERFERON GAMMA RELEASE ASSAY?

TB Gold Interferon Gamma Release Assay (IGRA) is a blood test that detects an immune response to proteins associated with Mycobacterium tuberculosis, the bacterium that causes tuberculosis (TB). The test is needed to help identify TB infection, particularly latent TB infection, in individuals who may have been exposed to the bacteria. It can be useful when screening is required for healthcare, occupational, or clinical reasons.

Additional Information

Also known as/ Other names: QuantiFERON-TB Gold Test (QFT-G), Interferon Gamma Release Assay (IGRA) – TB, QuantiFERON-TB Gold Plus, TB Gold Test – Blood, TB IGRA Test, Interferon Gamma TB Assay
Parameters: 1
Recommended for: M/F/Others
Sample Type: Blood
Patient Preparation: No prior preparation is needed
Reports: 2 Days

FAQs

What is latent TB infection?

Latent TB infection occurs when a person has been infected with TB bacteria but does not have symptoms and cannot spread TB to others.

What does a negative TB Gold result mean?

A negative result generally suggests that TB infection is unlikely, but it cannot completely exclude infection, particularly in people with recent exposure or weakened immune responses.

What does an indeterminate TB Gold result mean?

An indeterminate result means the test did not provide a clear result, often because the immune response was insufficient or technical factors affected the test. Repeat testing may be recommended.

What is an inconclusive or borderline TB Gold result?

Depending on the assay used, results near the testing cutoff may require careful interpretation or repeat testing according to laboratory and clinical guidelines.

Is TB Gold the same as the Mantoux or tuberculin skin test?

No. TB Gold is a blood-based IGRA, while the Mantoux test involves injecting tuberculin under the skin and measuring the skin reaction later.

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