TB Gold Quantiferon

Tuberculosis is an infection that most often affects the lungs and is caused by a bacteria called mycobacterium tuberculosis. An active TB infection is when the affected individual is experiencing TB symptoms. However, latent infection is when the TB organism is present in the individual’s body, but there are no symptoms. People with latent TB infection are not infectious and cannot spread the infection to others. However, if left untreated, this individual may develop an active infection in the future and may be able to transmit the disease.

The TB Gold Quantiferon test, also called QuantiFERON-TB Gold (QFT-G), is a modern alternative to the tuberculin skin test (TST). It assesses the specific immune response to TB, providing a more specific and sensitive analysis than the TST. The TB Gold Quantiferon test may be helpful for individuals who have been in close contact with someone with active TB, those with a history of travel to or residence in TB-endemic regions, and individuals with a weakened immune system. It is also used for healthcare workers and in TB screening programs.

A positive result is a strong indicator of TB infection. However, the TB Gold Quantiferon test cannot distinguish between active and latent TB infection and, therefore, is used in conjunction with risk assessment, radiography, and other medical and diagnostic evaluations.

Usually, no special preparation is required for the TB Gold Quantiferon test. The timing of the test can affect the accuracy of the results. If a person is tested too soon after exposure to tuberculosis bacteria, they may have a false negative result. Doctors recommend testing at least 6 to 8 weeks after the exposure to TB.

Test result ranges are approximate and may differ slightly between labs depending on the methodology and laboratory guidelines. Discuss your test reports with your doctor. Doctors may consider other factors, such as your health history, symptoms, medical conditions, and other test results, to establish a diagnosis of TB disease.