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==Introduction==
==Introduction==
Malasseszia Dermatitis is a skin disease associated with the yeast [[Malassezia pachydermatis|''Malassezia pachydermatis'']]. It is common in dogs but rare in cats. The yeast is found on skin and mucosal sites in healthy dogs and cats and under circumstances which remain poorly understood can proliferate and induce skin disease.
Malasseszia Dermatitis is a skin disease associated with the yeast [[Malassezia pachydermatis|''Malassezia pachydermatis'']]. It is common in dogs but rare in cats. The yeast is found on skin and mucosal sites in healthy dogs and cats and under circumstances which remain poorly understood can proliferate and induce skin disease.
==Clinical signs==
==Clinical signs==
Malassezia dermatitis can complicate or mimic allergic skin disease and scaling skin disorders. The main clinical signs are '''erythema and a greasy exudate''' which may result in matted hair with variable amounts of alopecia and scaling. Hyperpigmentation and lichenification occur in chronic cases. Concurrent erythematous otitis externa with variable ceruminous discharge is common.
Malassezia dermatitis can complicate or mimic allergic skin disease and scaling skin disorders. The main clinical signs are '''erythema and a greasy exudate''' which may result in matted hair with variable amounts of alopecia and scaling. Hyperpigmentation, lichenification and follicular plugging occur in chronic cases. Concurrent erythematous otitis externa with variable ceruminous discharge is common.
The degree of pruritus is variable but can be extreme especially on the face in a small number of dogs.
The degree of pruritus is variable but can be extreme especially on the face in a small number of dogs.
==Laboratory tests==
==Laboratory tests==
Treatment is aimed at reducing the yeast population and treating any underlying skin conditions. The first choice of treatment is an antifungal medicated '''shampoo containing miconazole and chlorhexidine'''. Selenium sulphide in combination with enilconazole or ketoconazole can also be used topically but is less effective. The use of systemic antifungal drugs such as ketoconazole can also be considered. The response to treatment should be measured by clinical response and by a reduction in yeast populations in skin lesions upon microscopic examination.
Treatment is aimed at reducing the yeast population and treating any underlying skin conditions. The first choice of treatment is an antifungal medicated '''shampoo containing miconazole and chlorhexidine'''. Selenium sulphide in combination with enilconazole or ketoconazole can also be used topically but is less effective. The use of systemic antifungal drugs such as ketoconazole can also be considered. The response to treatment should be measured by clinical response and by a reduction in yeast populations in skin lesions upon microscopic examination.
==Literature Search==
{{Learning
|Vetstream = [https://www.vetstream.com/canis/Content/Disease/dis00126.asp Malassezia dermatitis]<br>[https://www.vetstream.com/canis/Content/Bug/bug00277.asp Malassezia pachydermatis]
|flashcards = [[Small Animal Dermatology Q&A 08]]
|literature search = [http://www.cabdirect.org/search.html?rowId=1&options1=AND&q1=malassezia&occuring1=title&rowId=2&options2=AND&q2=dermatitis&occuring2=title&rowId=3&options3=AND&q3=&occuring3=freetext&x=51&y=13&publishedstart=yyyy&publishedend=yyyy&calendarInput=yyyy-mm-dd&la=any&it=any&show=all Malassezia Dermatitis publications]
|full text = [http://www.cabi.org/cabdirect/FullTextPDF/2009/20093115170.pdf '''How I treat Malassezia dermatitis'''. Ghubash, R.; The North American Veterinary Conference, Gainesville, USA, Small animal and exotics. Proceedings of the North American Veterinary Conference, Orlando, Florida, USA, 17-21 January, 2009, 2009, pp 328-329]
[http://www.cabi.org/cabdirect/FullTextPDF/2009/20093115083.pdf ''' How I treat Malassezia dermatitis'''. Rosenkrantz, W.; The North American Veterinary Conference, Gainesville, USA, Small animal and exotics. Proceedings of the North American Veterinary Conference, Orlando, Florida, USA, 17-21 January, 2009, 2009, pp 392-393, 5 ref.]
[http://www.cabi.org/cabdirect/FullTextPDF/2009/20093017851.pdf '''Malassezia dermatitis: diagnosis & management'''. Ihrke, P. J.; Gething, M.; Jones, B.; Australian Small Animal Veterinary Association, Bondi, Australia, 33rd World Small Animal Veterinary Association Congress, Dublin, Ireland, 20-24 August 2008, 2008, pp 169-171, 5 ref.]
}}
==References==
==References==
* Foster, A, and Foll, C. (2003) '''BSAVA small animal dermatology (second edition)''' '' British Small Animal Veterinary Association''
* Foster, A, and Foll, C. (2003) '''BSAVA small animal dermatology (second edition)''' '' British Small Animal Veterinary Association''
* Bond, R, Hendricks, A. (2008) '''Veterinary Dermatology Integrated BVetMed course notes''' Department of Veterinary Clinical Sciences and Pathology and Infectious Disease. Royal Veterinary College, University of London.
* Bond, R, Hendricks, A. (2008) '''Veterinary Dermatology Integrated BVetMed course notes''' Department of Veterinary Clinical Sciences and Pathology and Infectious Disease. Royal Veterinary College, University of London.
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[[Category:Expert Review]]
[[Category:Expert Review]]
[[Category:Dermatology]]
[[Category:Dermatological Diseases - Dog]]
[[Category:Cutaneous Mycoses]]