Scrapie - Advisory notes for farmers

NSP genotypes tableGenotype NSP Degree of resistance/susceptibilityresult TypeARR / ARR 1 Sheep that are genetically most resistant toscrapie.ARR / AHQ 2 Sheep that are genetically resistant to scrapie,ARR / ARHbut will need careful selection when used forARR / ARQfurther breeding.AHQ / AHQ 3 Sheep that genetically have little resistanceAHQ / ARHto scrapie.AHQ / ARQSale and breeding restrictions apply in NSP flocks,ARH / ARHwhich are breed specific.ARH / ARQARQ / ARQARR / VRQ 4 Sheep that are genetically susceptible to scrapieand should not be used for breeding unless in thecontext of an approved and controlled breedingprogramme.AHQ / VRQ 5 Sheep that are highly susceptible to scrapieARH / VRQand should not be used for breeding.ARQ / VRQVRQ / VRQCurrent science indicates that as a result of the NSP we should, in due course,see a very significant reduction in the incidence of scrapie and eventually itsdisappearance from the national flock. It is hoped that as many eligiblebreeders as possible will want to play their part in the NSP.14