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Category Article Pets Animals Malassezia (yeast) Dermatitis
Category Article Pets Animals Malassezia (yeast) Dermatitis 
| Malassezia (yeast) Dermatitis |
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Definition
Malassezia Dermatitis is a pruritic condition associated with the presence of the yeast Malassezia pachydermatitis. This common yeast organism that is found on normal and abnormal canine skin and ears. On normal healthy skin it causes no problems, but when the environment of the skin is altered for any one of many reasons, Malassezia can cause severe dermatitis or otitis (inflammation of the skin or ears respectively) Etiology increased yeast organisms or hypersensitivity to surface yeast may be associated with disease that may induce seborrheic conditions on the skin. predisposition factors:
Pathophysiology The precise pathogenesis is unclear, although Malassezia pachydermatitis thrives in areas of skin with increased lipid content and may be more prevalent in greograpic region where humidity is hight. Clinical sign
Diferential diagnosis Demodicosis, atopic dermatitis, food hypersensitivity, sarcoptic mange, superficial pyoderma, idiopathic defects in keratinization Diagnosis Skin cytology is recommended to confirm the diagnosis and suitable samples may be collected by a variety of techniques including : •Direct impression smears onto glass slides •Swabbing •Sticky tape collection •Skin scraping •Biopsy The yeast can be identified under a microscope by it's characteristic appearance : •No mycelia •Lipophilic (stains blue with Dif QuikTM) •An elongated oval (peanut) shape •A thick wall •Budding at one end Treatment Ketoconazole (5-10mg/kg for 2-4 weeks),itraconazole or fluconazole may be necessary. Shampoos - degreasing and antifungal Anti-inflammatory drugs such as corticosteroids may not provide relief for the pruritus seen in patients with Malassezia dermatitis Tags: Article Pets Animals Malassezia (yeast) Dermatitis |
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