Lecture 6 Flashcards
Food allergy
Non seasonal
Pruritic
Associated with ingestion of food
What part of the food is the allergen
Protein
What reaction is a food allergy
Considered type I but can also be II, III, IV
Common allergens in the dog
Beef, eggs, soybean
Clin signs of food allergy
Recurrent infections on skin and ear Pruritus Recurrent moist dermatitis and urticaria Papules/ macules Secondary lesions May see GI symptoms
DDx of food allergy
Flea allergy
Atopy
Scabies
Diagnosis of food allergy
Food trial
Limitations of hydrolyzed diets
Only applies to type I
Increases risk for type IV
What is necessary to confirm diagnosis using food trial
Rechallenge
What type of reaction is allergic contact dermatitis
Type IV
Describe irritant contact dermatitis
All animals in contact are affected
Clin signs develop at first exposure
Describe contact allergic dermatitis
Type IV hypersensitivty
Need sensitization period before clin signs develop
Usually just one animal is affected
Diagnoses of contact allergy
Resolution of clinical signs with avoidance
Relapse after re exposure
Patch test- best way to identify specific antigen
Treatment of contact allergy
Avoidance
Steroids
NO hyposensitization
Pentoxifylline
