An overview is given about the most common immunological methods for the di
agnosis of bovine tuberculosis. These methods are based on cell mediated im
mune reactions on the one hand (intradermal skin test, interferon-gamma -te
st, lymphocyte transformation test) or on antibody production against Mycob
acterium bovis on the other hand (ELISA). The advantages and disadvantages
of the methods as well as their specificity and sensitivity are discussed.