Severe lesions of Malassezia dermatitis in a dog. Note the epidermal hyperplasia as well as the presence of a thick layer of keratin (orthokeratotic hyperkeratosis) between which scales innumerous forms of Malassezia may be seen. This case is particularly severe since the agent is seldom visible in skin biopsy samples in mild infections (above, H&E 40x; below, H&E 400x).

 






 
 
 
 
 

 

 
 
 
  
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