The single intradermal comparative cervical tuberculin (SICCT) test, commonly known as the tuberculin “skin test”, is the primary screening test for TB in cattle in Great Britain and other parts of the European Union (EU). The skin test is the internationally accepted standard for surveillance for infection with Mycobacterium bovis, and is considered the best screening test currently available for detecting TB in cattle. No diagnostic test is 100 per cent. accurate, but the current skin test is effective.
In October 2006, the Government extended the use of the gamma interferon blood test, alongside the skin test, to improve the sensitivity of the testing regime for controlling disease in infected herds by identifying more infected animals more quickly. It is being applied mainly in herds disclosing TB infection in low risk areas to help ensure infection does not become established in cattle or wildlife. It will also continue to be available for use as a disease control tool in areas of higher incidence.
In line with recommendations from the scientific community, DEFRA continues to fund further research into improved diagnostics for bovine TB.