Distribution of prion protein alleles in Norwegian sheep breeds

This document complies of the results of a survey of the prion protein genotypes (PrnP) of the Norwegian breeds in accordance with EU Decision 2002 / 1003 / ED (Anon., 2002a).

The aim of the survey is to estimate the prevalence of the PrnP-alleles in each Norwegian sheep breed with special emphasis on the PrnP-allele: ARR, which is considered the most resistant allele to scrapie.