Continuous reduction of infected herds was observed. The number of PI animals detected during surveillance activity reduced to 11 in 2007. Assessing the herd prevalence of seropositive animals by spot serological testing showed 7.9 % (3,890/49,212) in 2007. Diagnostic proficiency of the Antigen-capture ELISA was analysed with data from the control programme collected between 2005 and 2006.Validation of the Antigen-capture ELISA showed with respect of the detection of PI animals a sensitivity of 97.3 % and a specificity of 99.9 %. The positive predictive value (PPV) was found to be 79.1 %.Ear notch sampling of all new borne calves is a feasible method to prevent new infection within a region where trade and mountain pastures are common. Ear notch sampling can be combined with the application of standard ear tags within the first week of life. Bio security measures and regulations applying to trade are important requisites for future progress in the control scheme. Testing all offspring by ear notch sampling technique and elimination of PI animals reduced the prevalence of pestivirus infection in Tyrol considerably.
Bovine virus diarrhea / BVDV / cattle / control programm / ear notch samples / serology / Elisa