(1) Department of Animal Health, Neiker-Tecnalia, 48160 Derio, Bizkaia, Spain;(2) Department of Pathology, National Veterinary Institute, Postboks 750 Sentrum, 0106 Oslo, Norway
Abstract:
Background
Since 2002, an active surveillance program for transmissible spongiform encephalopathy in small ruminants in European Union countries allowed identification of a considerable number of atypical cases with similarities to the previously identified atypical scrapie cases termed Nor98.