This is an extract of our Atopy Flea Allergy Food Allergy document, which we sell as part of our Small Animal Internal Disease - Skin Notes collection written by the top tier of University Of Veterinary Medicine And Pharmacy Of Kosice, Slovakia students.
The following is a more accessble plain text extract of the PDF sample above, taken from our Small Animal Internal Disease - Skin Notes. Due to the challenges of extracting text from PDFs, it will have odd formatting:
4. Atopy, Flea Allergy, Food Allergy ATOPY :
= Canine atopic dermatitis; Canine allergic inhalant dermatitis; Canine atopic disease.
* Atopy is a genetically predisposed inflammatory and pruritic allergic skin disease
* Characteristic clinical features
* Associated with IgE ab to environmental allergens
* Dogs - skin disease with orcasional organ involvement
* Cats - also devp. Dermatitis also but may also have asthma like respiratory problems
* Atopy is reported to account for 8-30% of canine skin diseases. o The prevalence in the cat population is much lower. Etiology IgE mediated Type 1 Hypersensitivity Contributing factors:
* Environmental Allergens
* Staph. Pyoderma
* Malassezia dermatitis
* Concurrent flea or food allergy
* Temperature and humidity Age and sex predeliction
* First seen between 6mths-3yrs (rarely develops in dogs >7yrs
* No sex predeliction but females reported to be more commonly affected Breed Predeliction
* Dogs : Boxer, Boston terriers, Cairn terrier,Sharpei, English bulldogs, English/Irish setters, golden retrievers/labradors, WHWT, fox terriers, yorkies
* Cats - not been reported Seasonal Incidence - initially seasonal but progresses to non-seasonal Clinical Signs in Dogs AD should be considered as a dif. Dig. in any dog with:
* Recurrent staph or malassezia dermatitis
* Otitis externa Pruritis - Initial and most outstanding C.S. in dogs and cats
* Pruritus may be the only sign in some dogs.
* Most of the lesions observed are secondary to self-trauma.
* Pruritis on one or more of the following: Face, ears, ventrum and distal limbs (can become generalized)
* Currently a lot of debate on pathognomic lesions for AD. (assuming 20 lesions aren't present)
* Some dogs have no primary lesions
* Others - Rash (macular/popular dermatitis)
* Chronic self trauma leads to 20 lesions - alopecia, lichenification, hyperpigmentation, seborrhea
* Secondary pyoderma common - staphylococcus intermedius or Yeast dermatitis -
* Otitis externa - common in dogs with Ad
* Concurrent signs of fleas and flea allergy dermatitis are present in many patients. Clinical Signs in Cats
* Pruritis - Hallmark
* Other symptoms in cats are not like dogs
* Pruritis in cats may manifest as symmetric alopecia, military dermatitis or part of the eosinophilic comples lesions
* 20 bacterial or yeast infections or otitis less common Diagnosis : Diagnosis based on:
* Typical historical features
* Characteristic C.S.
* Exclusion of differential diagnoses Diagnostic Approach Step 1
* Dx. And Tx. 20 infections
* Dx. And TX concurrent flea allergy
* Dx. And tx scabies Step 2
* Confirm that the 20 infection, flea allergies and scabies are ruled out
* Determine that residual pruritis remains
* If pruritis is seasonal and flea allergy has been ruled out = AD
* If pruritis is non-seasonal, carry out a food trial to rule out food allergy Step 3
* If food trial eliminates the issue = food allergy
* Partial response with food trial - Food allergy and AD likely
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