As established by the Royal Decree, the surveillance of swine herds will have a passive component, based on communication with health officials, on part of animal owners, traders, importers, exporters, transporters and personnel related with animal health, informing of the appearance of any clinical symptoms of these diseases, and one active component based on systematic blood testing.
In this way, the Royal Decree will allow for a reduction in the current number of blood samples while maintaining an efficient alert system.
http://www.marm.es/es/prensa/ultimas-noticias/notas-de-prensa-din.aspx?tcm=tcm:7-156640-16