Term
what is Adverse Reaction to Food in Cats and Dogs?
is it common? |
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Definition
Non-seasonal, pruritic skin disease associated with the ingestion of a certain substance in the diet.
Not common in the Gen population |
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Term
| what is the pathophysiology of Adverse Reaction to Food? (ARF)...what kinda rxn, where does it occur, and what is sensitization period? |
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Definition
-evidence of involvement of Types I, III, and IV
hypersensitivity reactions.
- Rxn may occur at the mucosa or be a rxn to an
absorbed allergen
-A long (months to yrs) sensitization period is
required!!!) |
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Term
| what are common offending antigens in the US for ARF in dogs and cats? |
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Definition
dogs-beef, dairy, chicken, wheat, egg, corn, soy
cats-fish, beef, dairy |
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Term
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Definition
-any age but more common in young
-no sex or breed predisposition in dogs
-Siamese cats may be predisposed
-More common in atopic dogs than non-atopic
dogs |
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Term
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Definition
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Term
secondary lesions from ARF result from.....
and may cause______signs |
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Definition
-secondary lesions result from PRURITUS
-may also cause GI signs:
increased frequency of defecation, loose stools,
and thin body condition |
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Term
| what is the distribution of ARF in dogs |
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Definition
variable but often includes
-otitis externa
-axillae
-groin
can also cause non-pruritic recurrent SP |
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Term
| what is the distribution os ARF in cats? |
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Definition
variable but usually:
-head
-neck
but may be generalize...CRUSTING IS PROMINENT |
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Term
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Definition
| other pruritic dzs (esp FAD, ectoparasites, and atopy) |
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Term
| what is the only accurate test to Dx ARF? |
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Definition
| Feeding trial is the only accurate test |
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Term
| What is the Method of feeding trials in ARF? |
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Definition
1. choice of diets
2. must read food labels carefully
3. NO other foods (chewable
medications/supplements, treats, rawhides, etc)
4. DURATION OF TRIAL: at least 8 weeks
5. VERIFY IMPROVEMENT BY RECHALLENGE WITH
ORIGINAL FOOD
6. Provocative testing to identify specific allergens
7. Note: during first few weeks of the trial, the
patient may require some treatments for 2ndary
infections and/or symptomatic therapy for pruritus |
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Term
| in a feeding trial, what do you look at for the choice of diet? |
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Definition
1. PREFERRED METHOD: 1 PROTEIN, 1 CHO (both
novel to the patient)
2. Hydrolyzed protain diets: have not been
extensively tested in food allergic dogs/cats
w/skin dz |
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Term
| how do you manage ARF patients? |
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Definition
| avoid the allergy causing food |
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Term
KEY POINT FOR ARF:
what are factors that may help distinguish food allergy from atopy? |
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Definition
-Perennial pruritus from the initial onset
-may not respond to steroids
-can occur at any age
-may have GI signs
-may present with otitis externa as the only CS |
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Term
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Definition
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Term
| ARF disease in horses is similar to dogs/cats, except for what two things? |
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Definition
1. CS may be SEASONAL OR NON-SEASONAL
(depending on feeding practices)
2. Urticaria is more common in horses |
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