[Interpretation of results of serologic analyses in large animal practices].

The backgrounds to and possibilities of serological studies for the purpose of establishing are reviewed, all this with regard to bovine disease. The serology of the virus infections infectious bovine rhinotracheitis (IBR), bovine viral diarrhoea (BVD), para-influenza virus 3 infection (PI3), bovine respiratory syncytial virus (BRS) and Chlamydia is discussed in greater detail. Likewise, the interpretation of serological findings in cases of brucellosis, leptospirosis and Johne's disease is dealt with. In addition, attention is paid to the results of serological testing in cases of lung-worm disease and fascioliasis.