In Latvia bred of sheep breeds ewes Scrapie genotype analysis | Latvijā audzēto aitu māšu skrepi slimības genotipu analīze
2014
Barzdina, D., Latvia Univ. of Agriculture, Jelgava (Latvia). Inst. of Agrobiotechnology | Kairisa, D., Latvia Univ. of Agriculture, Jelgava (Latvia). Inst. of Agrobiotechnology
Scrapie (Chesma ovium) in sheep (Ovis aries) and goats (Capra aegagrus hircus) belongs to the transmissible spongiform encephalopathy (TSE) group as well as bovine spongiform encephalopathy (BSE) and human Creutzfeldt-Jakob disease (CJD). The disease is characterized by fatal degenerative disorder of the central nervous system. The aim of the study was to find out the frequency of Scrapie determinative genes in sheep breeds bred in Latvia and to divide sheep into risk groups for giving recommendations to owners about best animals for breeding. Classical Scrapie genotyping was determined in 2012 and 2013 from blood samples of 5,992 ewes from 51 Latvian sheep flock. Ewes included into the study mostly (44%) represented the risk group R2. Ewes from Oksforddowns breed were more resistant to Scrapie with genotype frequency of the ARR/ARR (50%). The greatest number of ewes regardless of the birth year (2003–2013) was included into R2 risk group, and this number increased over the years. The number of ewes that have been included into R4 and R5 risk groups decreased from 2003 until 2013 because the owners started to pay attention to the animal genotypes.
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