skip to Main Content
+49 7071 565 44 850 info@centerforanimalgenetics.com Facebook

Glanzmann Thrombasthenia (GT)

60,00 

 → Equine coagulopathy (inproper blood clotting).


Instructions for ordering:

  1. Enter the information of the first horse for which you want to order the test
  2. Add to cart
  3. Go to cart to check out, or
  4. Enter the information for a second horse
  5. For sample collection follow the instructions here.
  6. You can use this template to send in hair samples.
  7. Please also send the completed order form together with the samples.

For a breeder or veterinarian discount please contact us before ordering.

Any information you include here is optional, but will be included on the certificate of results.

Enter the name of your animal
Enter your animal's date/year of birth
Enter the breed name
Enter the registration number if known
Enter the microchip number
Is there anything else you would like to tell us about your horse? Reason for testing, symptoms etc.?

General Information

  • Platelet function disorder → inproper clotting and thus delayed wound closure.
  • Increased bleeding tendency → might cause serious problems with large wounds.
  • There are two mutations causative for GT (gt1 and gt2). Horses may have one or both variants, so this test identifies both mutations.

Symptoms

  • Recurrent bleeding (cutaneous, nose, mucosal, gingival etc.)
  • Delayed, inproper wound closure/healing

Inheritance and Genotypes

→ GT is an autosomal recessive hereditary disease, meaning that horses with only one copy of the genetic variant (N/gt) are clinically normal carriers while horses with two copies of the genetic variant (gt/gt) are affected.

Genotype: The horse is: Effects:
N/N normal. The horse does not have any copies of the genetic variants causative for GT and therefore cannot pass it on to any offspring.
N/gt1 a carrier. The horse is clinically healthy. The genetic variant causative for GT will be passed on to its offspring with a probability of 50%.
N/gt2 a carrier. The horse is clinically healthy. The genetic variant causative for GT will be passed on to its offspring with a probability of 50%.
gt1/gt1 affected. The genetic variant causative for GT will be passed on to all its offspring. All offspring will be carriers (N/gt1).
gt2/gt2 affected. The genetic variant causative for GT will be passed on to all its offspring. All offspring will be carriers (N/gt2).
gt1/gt2 affected. The genetic variant causative for GT will be passed on to all its offspring. All offspring will be carriers (N/gt1 or N/gt2).

Recommendations

  • Carriers may be bred to normal animals (N/gt1 x N/N or N/gt2 x N/N) without any risk of producing affected offspring. The offspring should also be tested before breeding to determine if they are carriers or normal.
  • Breeding two carriers (N/gt1 x N/gt1, N/gt1 x N/gt2, N/gt2 x N/gt2) is not recommended due to the possibility of 25% of the offspring being affected.
  • Affected animals (gt1/gt1 or gt2/gt2 or gt1/gt2) should not be used for breeding.

References

Sanz, MG., Wills, TB., Christopherson, P., Hines, MT.: Glanzmann thrombasthenia in a 17-year-old Peruvian Paso mare. Vet Clin Pathol 40:48-51, 2011. Pubmed reference: 21291483. DOI: 10.1111/j.1939-165X.2011.00289.x.

Christopherson, PW., van Santen, VL., Livesey, L., Boudreaux, MK.: A 10-base-pair deletion in the gene encoding platelet glycoprotein IIb associated with Glanzmann thrombasthenia in a horse. J Vet Intern Med 21:196-8, 2007. Pubmed reference: 17338169.Macieira, S., Rivard, G.E., Champagne, J., Lavoie, J.P., Bédard, C.: Glanzmann thrombasthenia in an Oldenbourg filly. Vet Clin Pathol 36:204-8, 2007. Pubmed reference: 17523098.

Christopherson, PW., Insalaco, TA., van Santen, VL., Livesey, L., Bourne, C., Boudreaux, MK.: Characterization of the cDNA Encoding alphaIIb and beta3 in normal horses and two horses with Glanzmann thrombasthenia. Vet Pathol 43:78-82, 2006. Pubmed reference: 16407493. DOI: 10.1354/vp.43-1-78.

Further information is available at Online Mendelian Inheritance in Animals.

Back To Top