Veterinary Medicine Notes > University Of Veterinary Medicine And Pharmacy Of Kosice, Slovakia Veterinary Medicine Notes > Small Animal Internal Disease - Skin Notes

Atopy Flea Allergy Food Allergy Notes

This is a sample of our (approximately) 8 page long Atopy Flea Allergy Food Allergy notes, which we sell as part of the Small Animal Internal Disease - Skin Notes collection, a A (> 90% ) package written at University Of Veterinary Medicine And Pharmacy Of Kosice, Slovakia in 2013 that contains (approximately) 40 pages of notes across 7 different documents.

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Atopy Flea Allergy Food Allergy Revision

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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:

• Pruritis

• 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)

Skin Lesions

• 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 →
Malassezia pachydermatis.

• 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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