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Classical scrapie in sheep. Risk groups and genotypes. Adapted from Dawson and collaborators [46].
| Genotype | Risk |
|---|---|
| PrPARR/PrPARR | R1 |
| PrPARR/PrPAHQ PrPAHQ/PrPAHQ |
R2 |
| PrPARR/PrPARQ PrPARR/PrPARH PrPARQ/PrPAHQ PrPAHQ/PrPARH |
R3 |
| PrPARH/PrPARH PrPARQ/PrPARH PrPARQ/PrPARQ PrPARR/PrPVRQ PrPAHQ/PrPVRQ |
R4 |
| PrPARQ/PrPVRQ PrPARH/PrPVRQ PrPVRQ/PrPVRQ |
R5 |
