1887

dermatitis

image of Malassezia dermatitis
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Abstract

Understanding the biology, prompt identification and effective treatment of allergens is important; these topics are covered in this chapter.

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Figures

Image of 26.1
26.1 The characteristic ‘peanut’, ‘Russian doll’ or ‘snowman’ shapes of budding from a dog (Diff-Quik® stain; original magnification X1000).
Image of 26.3
26.3 German Shepherd Dog suffering from severe atopic dermatitis and secondary dermatitis. The dog responded well to twice weekly bathing with a 2% chlorhexidine/2% miconazole shampoo and ciclosporin at a dose of 5 mg/kg orally q24h.
Image of 26.4
26.4 (a) Erythema, alopecia and scaling of the foot of a Boxer with dermatitis secondary to hyperadrenocorticism. The skin was also greasy and malodorous. (b) Chronic dermatitis of the ventral neck in an atopic Staffordshire Bull Terrier. The affected skin is erythematous, alopecic, lichenified and seborrhoeic.
Image of 26.5
26.5 Erythroceruminous otitis associated with in a Weimeraner with a cutaneous food-responsive dermatosis. There is diffuse erythema of the ventral pinna with a dark brown waxy discharge around the opening of the vertical ear canal.
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26.6 (a) Idiopathic facial dermatitis in a Persian cat. This condition is often associated with dermatitis, although even aggressive topical or systemic anti- treatment can have little impact. (b) Build-up of brown waxy material on the proximal claw of a cat with . Generalized exfoliative dermatitis in cats is often associated with severe systemic disease. However, the mural folliculitis and dermatitis spontaneously resolved in this cat. (c) Generalized alopecia and scaling associated with overgrowth in a Domestic Shorthaired cat with lymphocytic mural folliculitis.
Image of 26.7
26.7 Impression smear from a dog’s skin stained with the Diff-Quik® basophilic stain (pot 3) only. The organisms have clearly stained well but note the monochrome image. Compare with Figures 26.1 and 26.8 , which have been stained with both the eosinophilic (pot 2) and basophilic stains. (Original magnification X400)
Image of 26.8
26.8 isolated on a stained adhesive tape strip preparation from a dog. This sample was stained with the eosinophilic (pot 2) and basophilic (pot 3) Diff-Quik® stains. Compare the staining with that in Figure 26.7 , where the preparation was stained with only the basophilic stain. (Original magnification X400)
Image of 26.9
26.9 Severe erythema, inflammation and scaling of the ventral pinna in a crossbreed dog with atopic dermatitis. Similar lesions were present in the interdigital skin, muzzle, axillae and groin. An intradermal allergen test was positive for only. The dog had a good response to -specific subcutaneous immunotherapy and topical anti- treatment. (Courtesy of Hilary Jackson)

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