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Created page with 'thumb|right|150px|''Malassezia pachydermidis'' - Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath *Normally pres…'
[[Image:Malassezia pachydermidis.jpg|thumb|right|150px|''Malassezia pachydermidis'' - Copyright Professor Andrew N. Rycroft, BSc, PHD, C. Biol.F.I.Biol., FRCPath]]
*Normally present in oily areas on the external [[Ear - Anatomy & Physiology|ear]] canal and [[Skin - Anatomy & Physiology|skin]] in dogs
**Some strains have been recovered from the [[Ear - Anatomy & Physiology|ear]] canal of cats
*Bottle-shaped, small budding cells, non-mycelial
*Gram stain shows purple yeast cells with a very wide base
*Grows on Sabouraud's Dextrose agar in 2 weeks of incubation at room temperature
*Greenish discolouration on blood agar
*Clinical disease may cause yeast to proliferate and cause infection
*Grossly:
**Regional lesions: muzzle, [[Ear - Anatomy & Physiology|ears]], interdigital, perianal
**Or generalised disease
**Erythematous, hyperpigmented, [[Skin Glossary - Pathology|lichenified]] and scaly lesions with alopecia
*Microscopically:
**[[Skin Glossary - Pathology|hyperkeratosis, parakeratosis]]
**Spongiotic pustular dermatitis
**[[Skin Glossary - Pathology|Acanthosis]]
**Organisms are usually present- minimum 3-5 yeasts per high-power field must be found to imply cause of disease
*''Malassezia pachydermis'' in [[Mycotic skin infections - Pathology#Malassezia dermatitis|malassezia dermatitis]][[Category:Yeast-like_Fungi]]
*Normally present in oily areas on the external [[Ear - Anatomy & Physiology|ear]] canal and [[Skin - Anatomy & Physiology|skin]] in dogs
**Some strains have been recovered from the [[Ear - Anatomy & Physiology|ear]] canal of cats
*Bottle-shaped, small budding cells, non-mycelial
*Gram stain shows purple yeast cells with a very wide base
*Grows on Sabouraud's Dextrose agar in 2 weeks of incubation at room temperature
*Greenish discolouration on blood agar
*Clinical disease may cause yeast to proliferate and cause infection
*Grossly:
**Regional lesions: muzzle, [[Ear - Anatomy & Physiology|ears]], interdigital, perianal
**Or generalised disease
**Erythematous, hyperpigmented, [[Skin Glossary - Pathology|lichenified]] and scaly lesions with alopecia
*Microscopically:
**[[Skin Glossary - Pathology|hyperkeratosis, parakeratosis]]
**Spongiotic pustular dermatitis
**[[Skin Glossary - Pathology|Acanthosis]]
**Organisms are usually present- minimum 3-5 yeasts per high-power field must be found to imply cause of disease
*''Malassezia pachydermis'' in [[Mycotic skin infections - Pathology#Malassezia dermatitis|malassezia dermatitis]][[Category:Yeast-like_Fungi]]