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Demodicosis
/content/chapter/10.22233/9781905319886.chap22
Demodicosis
- Author: Peter J. Forsythe
- From: BSAVA Manual of Canine and Feline Dermatology
- Item: Chapter 22, pp 164 - 172
- DOI: 10.22233/9781905319886.22
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Copyright:
- Publication Date: September 2012
Abstract
PLEASE NOTE A NEW 4TH EDITION HAS BEEN PUBLISHED AND IS AVAILABLE IN THE LIBRARY AND IN PRINT
Demodicosis results from the excessive proliferation of Demodex 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 Demodex mites. The chapter looks at Species of mite; Pathogenesis; Clinical presentation; Diagnostic tests; and Treatment.
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Figures
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22.1
Adult Demodex canis mite. © 2012 British Small Animal Veterinary Association
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22.1
Adult Demodex canis mite.
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22.2
Demodex canis. (a) Skin scraping showing a mite. (Original magnification x100; oil immersion) (b) Hair plucking showing four eggs (arrowed). (Original magnification x100; oil immersion) © 2012 British Small Animal Veterinary Association
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22.2
Demodex canis. (a) Skin scraping showing a mite. (Original magnification x100; oil immersion) (b) Hair plucking showing four eggs (arrowed). (Original magnification x100; oil immersion)
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22.3
Skin scraping showing a short-tailed Demodex mite (centre) in association with a D. canis mite (lower left). © 2012 British Small Animal Veterinary Association
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22.3
Skin scraping showing a short-tailed Demodex mite (centre) in association with a D. canis mite (lower left).
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22.4
Skin scraping showing a Demodex injai mite. (Original magnification x100; oil immersion) © 2012 British Small Animal Veterinary Association
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22.4
Skin scraping showing a Demodex injai mite. (Original magnification x100; oil immersion)
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22.5
Skin scraping showing a Demodex gatoi mite. (Original magnification x100; oil immersion) (Courtesy of K Tater) © 2012 British Small Animal Veterinary Association
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22.5
Skin scraping showing a Demodex gatoi 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 Demodex canis. © 2012 British Small Animal Veterinary Association
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22.7
Localized demodicosis in a Flat Coated Retriever caused by Demodex canis.
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22.8
Generalized demodicosis caused by Demodex canis. (a) Juvenile-onset in a Staffordshire Bull Terrier. (b) Adult-onset and pyoderma in an atopic West Highland White Terrier treated with glucocorticoids. © 2012 British Small Animal Veterinary Association
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22.8
Generalized demodicosis caused by Demodex canis. (a) Juvenile-onset in a Staffordshire Bull Terrier. (b) Adult-onset and pyoderma in an atopic West Highland White Terrier treated with glucocorticoids.
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22.9
Juvenile-onset pustular demodicosis (Demodex canis) in a Boxer. Note the alopecia, papules, pustules, crusting and comedone formation. © 2012 British Small Animal Veterinary Association
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22.9
Juvenile-onset pustular demodicosis (Demodex canis) 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 Demodex canis infestation. © 2012 British Small Animal Veterinary Association
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22.10
Pododemodicosis in a Lhasa Apso associated with Demodex canis infestation.
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22.11
Demodex injai infestation in a West Highland White Terrier. Note the area of erythema, pruritus and greasy exudation over the dorsal trunk. © 2012 British Small Animal Veterinary Association
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22.11
Demodex injai 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 Demodex injai infestation. © 2012 British Small Animal Veterinary Association
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22.12
Shih Tzu with intense facial pruritus associated with Demodex injai infestation.
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22.13
Facial dermatitis in a Persian cat resulting from Demodex cati infestation. (Courtesy of A Patel) © 2012 British Small Animal Veterinary Association
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22.13
Facial dermatitis in a Persian cat resulting from Demodex cati 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 Demodex gatoi. (Courtesy of K Tater) © 2012 British Small Animal Veterinary Association
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22.14
Bilaterally symmetrical alopecia over the ventral trunk and limbs associated with an infestation of Demodex gatoi. (Courtesy of K Tater)