The Multidrug Resistance gene 1 (the MDR1 gene) plays an important role in the barrier between blood capillaries and brain tissue. Dogs suffering from oversensitivity for Ivermectine have been documented to be susceptible to neurotoxicity induced by many other drugs as well.
Test specific information
This test is patented in certain countries. We offer our clients two options for this test because we are not allowed to perform the test in our laboratory.
Firstly, the test can be ordered through a licensee of the patent owner.
As a second option, the test can be forwarded to a partner laboratory in non-patented territory.
Between these two options, a price difference is in place which is caused by the royalties costs on the test. The tests performed by both labs are technical identical.
The genetic factor is continuously present, and will always be visible.
The Turnaround Time (TAT) depends on various factors, such as the shipment time of your sample to the test location, the test method(s) and whether the tests are performed completely or partially by a Partner Lab or Patent owner.
The TAT of tests performed at our facilities is normally 10 working days after receipt of the sample at the testing laboratory (VHL, VHP or Certagen). For tests performed by a Partner Laboratory (so-called "partner lab test") or patent owner, the TAT is at least 20 working days after receipt of your sample. Because the shipment time to our Partner Labs or patent owner may vary due to factors we cannot influence, the mentioned 20 working days are therefore an estimate.
Sometimes it is necessary to re-run your sample. We call this a retest. In that case, the TAT will of course be extended.
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, Semen, Swab, Tissue. Please contact Dr. Van Haeringen Laboratorium if you wish to submit other material as listed.
An animal can be free and has in that situation two healthy alleles. When used in breeding this animal will not become ill due to the disease. It cannot spread the disease in the population.
An animal can be carrier and has in that situation one healthy and one disease allele. When used in breeding 50 percent of the offspring will receive the disease allele. Although the mode of inheritance is autosomal recessive, it is known that carriers can also show symptoms in certain circumstances. Therefore, additional genetic factors most probably contribute to the disease.
An animal can be affected and has in that situation two disease alleles. When used in breeding all offspring will also receive the disease allele. Affected will become ill.
This genetic factor is inherited in an autosomal, recessive, mode. This means, that the individual can be free of the disease (homozygote normal), affected (homozygous affected) or carrier (heterozygous).
With an autosomal, recessive mode of inheritance carriers typically don not show symptoms. However, for this particular disease penetrance of the genotype turned out to be incomplete, leading to clinical signs even in some carriers. The autosomal recessive mode of inheritance cannot explain the observed conditions alone, so most probably other genetic factors contribute to the disease.
Carriers may spread the mutation in a population without showing symptoms themselves. Because of this, it is extremely important to identify carriers correctly to prevent spreading of a mutation.
Severity of Disease