PrP genotype in Sarda breed sheep and its relevance to scrapie

PrP genotype in Sarda breed sheep and its relevance to scrapie Several PrP gene polymorphisms modulate sheep scrapie susceptibility. Recently, an increase of scrapie outbreaks has been reported in Italy. A vaccine containing sheep brain homogenate was used in most of the outbreaks. We investigated PrP gene polymorphisms in scrapie-affected and clinically healthy Sarda breed sheep from a flock exposed to the aforementioned vaccine, and in affected Sarda sheep from unexposed flocks. All affected animals were (Gln/Gln) 171 homozygous. Moreover, we observed no variation for Ala 136 and a new polymorphism (Lys to Asn) at codon 176. Our findings confirm the correlation between scrapie and (Gln/Gln) 171 in breeds with no variation for Ala 136 . Archives of Virology Springer Journals

PrP genotype in Sarda breed sheep and its relevance to scrapie

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