Why is there not a retest to check results?

Information on why Tuberculosis (TB) reactors animals are not retested to confirm results.

The tuberculin test is the internationally accepted indicator of TB infection. Rules for programmes of testing are laid down in European Union directives. When reactors are found, the priority is to remove them from the herd and reduce the risk to other cattle. The tuberculin test already has an inconclusive category, which is used when it is necessary to check results.