Canine Atopic Dermatitis – A practical approach

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AC/1398/15

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1. Which one of the following statements regarding Canine Atopic Dermatitis (CAD) (a – e) is most correct? *

1 point

CAD is mainly caused by aeroallergens which are inhaled.

CAD dermatitis is mainly caused by contact allergens .

CAD is mainly caused by percutaneous exposure to aeroallergens

CAD is mainly caused by a food allergen.

CAD is mainly caused by superficial bacterial and fungal infestation.

2. Which one of the following statements (a-e) regarding CAD is most correct? *

1 point

Epidermal langerhans cells bind allergens and process and present them to naïve T cells.

Macrophages in the sub-dermis bind allergens and present to the Langerhans cells.

Atopic dogs have impaired cell mediated immunity.

Re-exposure to allergens causes mast cell degranulation and cytokine release.

Allergic dogs have T-lymphocyte response in a TH-2 response.

3. Which of the following statements (a-e) regarding lesion distribution in CAD is most correct? *

1 point

Lesion distribution is diagnostic in canine allergic dermatitis.

Lesion distribution for atopic dermatitis and flea allergic dermatitis are similar.

Lesion distribution for atopic dermatitis and food allergy dermatitis are similar.

Lesion distribution is of no diagnostic value in canine allergic dermatitis.

Lesion distribution is the same for acute and chronic canine allergic dermatitis.

4. Which one of the following statements regarding flea infestation (a-e) and CAD is most correct? *

1 point

Flea allergic dermatitis has no specific lesion distribution

In contact animals will also exhibit severe pruritis due to flea infestation.

Fleas must be seen to make a diagnosis of flea allergic dermatitis.

The presence of flea dirt is sufficient to make a diagnosis of flea infestation.

If flea control treatment is being used - flea allergic skin disease is not a differential.

5. Which one of the statements (a-e) regarding the clinical signs of CAD is incorrect? *

1 point

Otitis externa accompanies 80% of atopic dermatitis cases.

Otitis externa due to atopic dermatitis is always bilateral.

Primary lesions of canine atopic dermatitis are erythematous macules and papule.

Facial and ear rubbing and chewing of paws and distal extremities is typical of CAD.

Chronic cases have seborrheic skin changes changes

6. Which one of the clinical signs listed a-e is not a major criteria of atopic dermatitis ? *

1 point

Bilateral front feet pododermatits.

Facial erythema.

Inflammation of inner surfaces of the pinnae.

Elbow and hock show crusting and pruritis.

Otitis externa.

7. Which one of the statements listed below (a-e) is most correct regarding serum allergy testing in CAD? *

1 point

Allergy testing is important in making a diagnosis of CAD.

Allergy testing is done when avoidance of the cause or immunotherapy is an option, once a diagnosis of CAD is made.

Prolonged corticosteroid therapy may result in negative tests.

Cyclosporine must be removed 7 days prior to sampling for allergy tests.

Allergy testing will probably result in cure of the patient

8. Which one of the following statements (a-e) regarding secondary bacterial infection in CAD is incorrect *

1 point

Control of secondary infection is an important therapeutic trial when diagnosing canine atopic dermatitis.

Secondary infections should be treated with antibiotics for a minimum of 3 weeks.

Skin lesions, but not pruritis, may resolve with treatment pulse or weekend treatment can. be instituted after the initial 3 weeks has been shown to be effective.

Chronic malassezia infection often exists concurrently with bacterial overgrowth.

Topical therapy will never be sufficient to control secondary bacterial infections.

9. Which of the following statements regarding the use of immunosuppressive drugs in CAD is incorrect? *

1 point

Prednisilone has a biological effect of 4-7 days , thus treatment can be initiated at 5 day intervals.

Cyclosporine is used as an alternative to corticosteroid therapy as it has less side effects.

Cyclosporine is used as an alternative to corticosteroids as it has a greater efficacy.

Side effects of corticosteroids are urinary tract and skin infections.

Cyclosporine and prednisolone can both be tapered after induction doses.

10. Which one of the following statements regarding food trails in allergic skin disease in dogs is incorrect? *

1 point

A hypoallergenic food trial should last 8 weeks

Serology tests for diagnosis adverse food reactions (food allergy) are not of diagnostic value

CAD and food allergy may coexist

The food trial must be of a home-made diet

GIT signs resolve more rapidly than skin signs when a food trial is used.

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