EPIDEMIOLOGY AND CONTROL OF PORCINE REPRO DUCTIVE AND RESPIRATORY SYNDROME (PRRS)

The results of surveys, using the indirect peroxidase monolayer assay (IPMA), in areas of varying disease status are described. Retrospectiv e examinations of sera from selected areas before the first outbreak o f the disease in Germany were also made. In one region with a sporadic incidence of disease 25 breeding herds and 3 boar centres were examin ed serologically. The most important risk factor with respect to the p revalence of seropositive animals was the introduction of ted animals. An analysis of reproductive performance over the last two years indic ated a reduced incidence of clinical disease. In view of the current k nowledge of PRRS the control measures have been removed and the diseas e is no longer notifiable.