| prion protein gene polymorphisms in healthy and scrapie-affected sheep in greece. | a total of 216 local crossbred sheep from 16 scrapie-affected greek flocks and 210 purebred sheep of the milk breeds chios and karagouniko from healthy flocks were analysed for scrapie-linked polymorphisms in the prion protein (prp) gene. of the 216 sheep in this case-control study, 96 sheep were clinical cases, 25 subclinical cases (asymptomatic at the moment of euthanasia but positive by histopathology and/or elisa detecting proteinase-resistant prp) and 95 healthy controls (negative by all ev ... | 2004 | 14769911 |