Changes

''M. Pachydermatitis'' is bottle-shaped, and non-mycelial.   

''M. Pachydermatitis'' is bottle-shaped, and non-mycelial.   

*Gram stain shows purple yeast cells with a very wide base

*Gram stain shows purple yeast cells with a very wide base, and has a greenish discolouration on blood agar.

 

Grossly, regional lesions may be seen around the muzzle, [[Ear - Anatomy & Physiology|ears]], interdigital, and perianal.  Other common signs include erythema, hyperpigmentation, [[Skin Glossary - Pathology|lichenified]] and scaly lesions with alopecia.

 

*Grossly:

**Regional lesions: muzzle, [[Ear - Anatomy & Physiology|ears]], interdigital, perianal

**Erythematous, hyperpigmented, [[Skin Glossary - Pathology|lichenified]] and scaly lesions with alopecia

*Microscopically:

*Microscopically: