What is QuantiFERON-TB Gold Plus?

QFT-Plus is our latest version of the industry-leading IGRA for TB detection, QuantiFERON-TB Gold. QFT-Plus uses the same principle, test procedures, and reliable technology that you trust, but is now optimized with innovative tuberculosis-specific antigens that elicit both CD8+ and CD4+ T cell responses.

QFT-Plus had received U.S. FDA approval and will be made available for sale later this year. Sign up here to receive the latest email updates on the U.S. QFT-Plus product launch.

QFT-Plus technology

QFT-Plus uses four unique blood collection tubes that enable immediate exposure of viable blood lymphocytes to highly specific TB antigens and test controls coated on the inner surface of the tubes. Antigen exposure produces a quantifiable immune response to aid in the diagnosis of TB infection.

Nil tube (Grey)

Negative control to adjust for background IFN-γ

TB1 tube (Green)

Primarily detects CD4+ T cell response

TB2 tube (Yellow)

Optimized for detection of CD4+ and CD8+ T cell responses

Mitogen tube (Purple)

Positive control to confirm baseline immune status

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