Vesicopustular dermatitis of the nail bed and skin due to PEMPHIGUS FOLIACEOUS. This is an auto-immune disease usually found in dogs. I have not yet found out how it is triggered and I have yet to speak with anyone who has seen this in possums.Comment:
The gross and histological changes are indicative of pemphigus foliaceus an autoimmune disease where antibodies are formed against vasculitis which may be secondary.
The histopathology part of the report states that no bacteria can be seen. No fungi were evident in PAS stained sections.