"The Canadian Food Inspection Agency (CFIA) conducts enhanced surveillance for porcine brucellosis, trichinellosis, and pseudorabies (Aujeszky's disease). This initiative is in partnership with the swine industry and provincial and territorial authorities. Historically, Canada has conducted periodic, large-scale surveys for these three diseases. Those surveys have always demonstrated that Canada is free of these diseases. Under the enhanced surveillance system, serum samples from mature animals at Canadian slaughter facilities are regularly collected and tested. Additional sample collection points will be identified as the surveillance system is further developed and implemented."