Tuberculosis Gold Interferon Gamma Release Assay near me in Chennai

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TB Gold / Gamma Interferon, also called QuantiFERON-TB Gold (QFT-G), is a screening test done to diagnose for Tuberculosis (TB). This test is suggested if you have symptoms of TB such as persistent cough, fever, and sudden weight loss. People who are at high risk for developing TB are those with HIV infection, weakened immune system, and advanced age. It may also affect those not treated properly for TB in the past.

QFT is a modern alternative to the tuberculin test. It provides highly specific and sensitive analysis of the condition. A positive result is a strong indicator of TB infection. However, this test cannot distinguish between active and latent TB infection.

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What does Tuberculosis Gold Interferon Gamma Release Assay measure?

Latent tuberculosis infection (LTBI) is a non-communicable asymptomatic condition that can persist for many years and may progress to tuberculous disease in the future. The main aim of diagnosing LTBI is to analyze the condition and suggest a medical treatment to prevent the disease. This test measures the response of the immune system towards the antigens produced by the mycobacterial proteins.

A positive result indicates that mycobacterium tuberculosis infection is likely to happen but to confirm the diagnosis further medical evaluation is necessary.

This test is usually negative in individuals vaccinated with Mycobacterium bovis BCG.

Content created by

Dr. Swati Gupta (Anand)

MBBS, MD Lab Medicine

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Last Updated

25th Oct 2023