The disease scrapie occurs in sheep due to a complex interaction between genetic factors and the environment. Genetic factors influencing scrapie have been identified in the PrP-gen. There are three amino acids (136, 154 and 171) at which the genetic variation is established in the DNA test. Results vary from sensitive to scrapie (V136) to resistant (R171).
Test specific information
SCRAPIE RESULT TABLE
ARR/ARQ Low risk
ARR/ARH Low risk
AHQ/AHQ Low risk
ARQ/AHQ Low risk
AHQ/ARH Low risk
ARH/ARH Low risk
ARQ/ARH Low risk
ARR/VRQ Low risk
AHQ/VRQ Low risk
ARQ/ARQ High risk
ARQ/VRQ Very high risk
ARH/VRQ Very high risk
VRQ/VRQ Very high risk
Baylis, M. et al., (2004). Risk of scrapie in British sheep of different prion protein genotype. Journal of General Virology, 85(9), 2735-2740.
European Commission: The policy of breeding and genotyping of sheep, i.e. the issue of whether sheep should be bred to be resistant to scrapie.
The disease may show itself on different ages, in which it cannot be estimated when the first symptoms may show themselves. Differences may exist between littermates, and between breeds.
Turn Around Time
The turn-around-time of a test depends to a large extent on the logistics of sample transportation to the laboratory. After receiving the sample at the test location, you can normally expect the result within 10 working days. A longer delivery time applies to tests carried out by a Partner Lab.
Location of disease or trait
This disease leads to a loss of brain function.
For this test samples from all breeds are accepted.
For this DNA test we accept the following materials: Blood EDTA, Blood Heparin. Please contact Dr. Van Haeringen Laboratorium if you wish to submit other material as listed.
The result of the scrapy test show the genetic variation at codons 136, 154 and 171.
The test for scrapie is based on a combination of genetic factors in one protein. The combination is inherited together.
Severity of Disease