Interferon gamma test
The interferon gamma blood test (or gamma test for short) is a lab based supplementary test for the diagnosis of TB in cattle. It is approved in the EU for use in conjunction with the tuberculin skin test to increase the overall sensitivity of testing. It is usually only used in known infected herds under TB restrictions.
Antibody or serological blood tests have been developed to diagnose TB in cattle. They detect specific antibodies produced by the animal in response to infection with Mycobacterium bovis, the bacterium that causes bovine TB.