Warmblood fragile foal syndrome

Warmblood Fragile Foal Syndrome (WFFS) is a genetic disorder that affects warmblood horses. It is characterized by extremely fragile skin that tears easily, joint laxity, and other serious symptoms. The syndrome is caused by a mutation in the PLOD1 gene, which is responsible for the production of an enzyme involved in the formation of collagen, a protein that provides strength and structure to the skin, ligaments, and blood vessels.

Symptoms

The symptoms of Warmblood Fragile Foal Syndrome are usually apparent at birth. They include:

• Extremely fragile skin that tears or ulcerates easily
• Joint laxity, particularly in the fetlocks
• Hyperextension of the joints
• Hematomas and bruising
• Difficulty standing or walking
• In severe cases, affected foals may be stillborn or euthanized shortly after birth due to the severity of their symptoms.

Causes

Warmblood Fragile Foal Syndrome is caused by a mutation in the PLOD1 gene. This gene is responsible for the production of an enzyme called lysyl hydroxylase, which is involved in the formation of collagen. When this gene is mutated, the resulting enzyme is unable to function properly, leading to the production of weak, fragile collagen. This in turn leads to the symptoms seen in WFFS.

Diagnosis

Diagnosis of Warmblood Fragile Foal Syndrome is typically made based on the presence of characteristic symptoms. Genetic testing can also be performed to confirm the diagnosis. This involves taking a blood sample from the foal and testing it for the presence of the PLOD1 mutation.

Treatment

There is currently no cure for Warmblood Fragile Foal Syndrome. Treatment is supportive and aimed at managing symptoms. This may include wound care for skin tears and ulcers, and pain management for joint issues. In severe cases, euthanasia may be considered to prevent suffering.

Prevention

As WFFS is a genetic disorder, prevention involves careful breeding practices. Horses known to carry the PLOD1 mutation should not be bred together, as there is a 25% chance that their offspring will inherit the disorder.

See also

• Genetic disorders in horses
• Warmblood
• PLOD1
• Collagen