Dr. van Haeringen Laboratorium B.V.

P899 Hoof wall separation disease (HWSD)


Hoof Wall Separation Disease (HWSD) is an autosomal recessive condition, which affects the Connemara pony. It belongs to the Ectodermal dysplasias (EDs), a heterogenous group of congenital disorders. Clinical manifestation occurs during the first year of live. The dorsal hoof wall of affected ponies breaks and separates from the hoof under load of the body weight. Thus, the affected pony has to walk on the sole of the hoof with no support provided by the dorsal hoof wall. The associated chronic inflammation often leads to laminitis. A causal mutation responsible for the disease was identified in the SERPINB11 gene.

Test specific information



Symptoms will develop at a young age. Within a few hours to a maximum of several weeks after birth, the characteristics that go with these genetic effects will become visible.

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


Breed dependence

This DNA test is available for the following breeds: Connemara. Additional information is available in the Frequently Asked Questions (FAQ).

Sample type

For this DNA test we accept the following materials: Tissue, Hair, Semen, Blood EDTA, Blood Heparin. 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. Carriers will not become ill.

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).

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


Code P899

Hoof wall separation disease (HWSD)

€ 47,80 (Incl. 21% VAT)
€ 39,50 (Excl. VAT)