| Line 19: |
Line 19: |
| | | | |
| | | | |
| − | ==''Malassezia pachydermidis''==
| + | ''[[Malassezia pachydermidis]]'' |
| − | [[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]]
| |
| | | | |
| | ==''Rhodotorula''== | | ==''Rhodotorula''== |