image of Demodicosis
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Demodicosis results from the excessive proliferation of spp. Mites in the skin, and less commonly the ears. It is encountered frequently in dogs and rarely in cats. A variety of different clinical presentations are recognized, including localized and generalized, and juvenile and adult-onset forms. Over the past decade several completely new presentations of canine and feline demodicosis have been describes, which are putatively associated with different species of mites. The chapter looks at Species of mite; Pathogenesis; Clinical presentation; Diagnostic tests; and Treatment.

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22.1 Adult mite.
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22.2 . Skin scraping showing a mite. (Original magnification x100; oil immersion) Hair plucking showing four eggs (arrowed). (Original magnification x100; oil immersion)
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22.3 Skin scraping showing a short-tailed mite (centre) in association with a mite (lower left).
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22.4 Skin scraping showing a mite. (Original magnification x100; oil immersion)
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22.5 Skin scraping showing a mite. (Original magnification x100; oil immersion) (Courtesy of K Tater)
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22.7 Localized demodicosis in a Flat Coated Retriever caused by .
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22.8 Generalized demodicosis caused by . Juvenile-onset in a Staffordshire Bull Terrier. Adult-onset and pyoderma in an atopic West Highland White Terrier treated with glucocorticoids.
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22.9 Juvenile-onset pustular demodicosis () in a Boxer. Note the alopecia, papules, pustules, crusting and comedone formation.
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22.10 Pododemodicosis in a Lhasa Apso associated with infestation.
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22.11 infestation in a West Highland White Terrier. Note the area of erythema, pruritus and greasy exudation over the dorsal trunk.
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22.12 Shih Tzu with intense facial pruritus associated with infestation.
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22.13 Facial dermatitis in a Persian cat resulting from infestation. (Courtesy of A Patel)
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22.14 Bilaterally symmetrical alopecia over the ventral trunk and limbs associated with an infestation of . (Courtesy of K Tater)

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