Urticaria Urticaria is commonly called “wheals” or “welts”.
It is a
hypersensitivity reaction causing inflammation in the skin.
There are numerous causes of urticaria ranging from bedding or feed to certain vaccinations or infections. The allergen triggers a hypersensitivity reaction causing the release of histamine & other inflammatory mediators into the skin. Urticaria presents with the sudden onset of transient wheals appearing on the skin minutes after exposure to an allergen. Wheals may be seen in a restricted area or may form all over the skin, and they occur with varying degrees of pruritus. There is no pain associated and the hair will stand up/out. In some cases, digital pressure applied to a wheal may cause pitting of the skin.
Diagnosis of urticaria is through clinical signs and symptoms as well as a history of exposure to an allergen.
Treatment is the administration of oral
as well as corticosteroids.
Prevention of urticaria is by avoiding the ingestion of or contact with known allergens.
Juvenile Arabian Leukoderma
Juvenile Arabian leukoderma is commonly called “pinkie” or
.
This condition is seen primarily in Arabian horses less than two years of age and is therefore thought to have a genetic cause. In some individuals this condition is exacerbated by nutritional imbalances, most notable imbalances. of the skin of the muzzle, the skin surrounding the eyes, the skin of the ventral tail and the skin of the inguinal and genital areas. Vitiligo associated with cases of juvenile Arabian leukoderma may be permanent, may fluctuate or may undergo re- pigmentation depending on the interlay between genetics and nutrition. This condition involves
Diagnosis is through clinical signs and symptoms, and through biopsy and histology showing an absence of melanin in the skin.
There is no definitive treatment for juvenile Arabian leukoderma, however some individuals respond to the augmentation of copper levels in the diet.
As this condition involves a genetic predisposition it is not recommended to breed affected individuals as they may pass the trait on to their offspring.
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