Diagnosis
The veterinarian will ask the owner about the animal's history of symptoms. During the physical examination, the presence of itching and skin lesions will be assessed. Before concluding a diagnosis of inhalant allergy, the veterinarian will need to rule out other skin diseases including food hypersensitivity, flea allergy dermatitis, sarcoptic mange, contact dermatitis, and yeast infection of the skin. Diagnostic procedures can include bloodwork and urinalysis, and skin scrapings, and fungal cultures. Intradermal skin testing is believed to be the most accurate of the allergy tests; this procedure should be performed by an experienced veterinarian or by a veterinary dermatologist. There are also blood tests which may provide information about inhalant allergies for canines.
Cause
The most common allergens include airborne pollens such as grasses, trees, weeds, and fungal spores. Indoor allergens include natural fibers such as wool and household dust mites. In addition, some animals are allergic to the dander from other animals in the same dwelling. It commonly starts between the ages of one and five years.
Breeds Commonly Affected
Boston Terrier
Boxer
Cairn Terrier
Chinese Shar-Pei
Dalmation
English Setter
Golden Retriever
Irish Setter
Labrador Retriever
Lhasa Apso
Miniature Poodle
Miniature Schnauzer
Pug
Scottish Terrier
West Highland White Terrier
Wire-Haired Fox Terrier
Treatment
Treatment involves the avoidance of identified allergens when possible. Essential fatty acid supplements, given at higher doses, can help control the symptoms. Medications can include antihistamines, corticosteroids, and immunotherapy, or allergy shots. Owners should be aware that long-term use of corticosteroids can result in complications including iatrogenic Cushing's disease, or excessive levels of glucocorticoids in the body, diabetes mellitus, and worsening bacterial or fungal skin infections. Allergy shots are formulated specifically for individual animals and are administered by an injection under the skin. Improvement of symptoms can take three to twelve months. Immunotherapy is successful in reducing itching in 60 to 70 percent of dogs and 73 percent of cats. In addition, shampoos and topical products may be beneficial.
Prognosis
Inhalant allergy is a life-long disease that tends to worsen with age. Therefore, treatment is required for the duration of the animal's life.
Prevention
Inhalant allergy is a life-long disease that tends to worsen with age. Therefore, treatment is required for the duration of the animal's life.
Prevention includes avoiding known allergens by maintaining a dust-free house, closing windows, and keeping the animal indoors during high pollen season. It is also important to minimize complicating factors such as fleas, a dirty haircoat, and skin or ear infections. Because the predisposition to inhalant allergies may be genetically transmitted, affected animals should ideally not be bred.
