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Junctional epidermolysis bullosa (JEB) is an inherited disease that causes moderate to severe blistering of the skin and mouth epithelia, sloughing of hooves in newborn foals, and skin lesions that develop as the foal ages. This test detects a causal variant specific to Belgians and related breeds.


Mode of Inheritance: Autosomal recessive

Alleles: N = Normal, J =Junctional epidermolysis bullosa, Belgian variant

Breeds appropriate for testing: Belgian, Breton, Comtois


Explanation of Results:

  • Horses with N/N genotype will not have junctional epidermolysis bullosa and will not transmit this JEB variant to their offspring.
  • Horses with N/J genotype will not have junctional epidermolysis bullosa, but are carriers. They may transmit this JEB variant to 50% of their offspring. Matings between two carriers result in a 25% chance of producing a JEB-affected foal.
  • Horses with J/J genotype will have junctional epidermolysis bullosa, a fatal condition.


INSTRUCTION VIDEO: How to pull hair for testing


Please Note: All DNA parentage verification and mandatory health testing results, whether purchased through the EBRA or transferred into the EBRA system, will become permanent record, which the documented owner may access at any time upon request. The EBRA is not responsible for providing non-mandatory DNA test results, therefore the release of any additional testing performed by past or present owners must be negotiated between the private parties at time of purchase.

Junctional Epidermolysis Bullosa (JEB) Test

Excluding Sales Tax |
  • Required for all stallions who have not yet been tested

    Optional for mares

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