Psorergatic mange (Acari:Psorergatidae) of the stumptail macaque (Macaca arctoides)

Psorergates (Psorobia) sp were recovered from dermal cysts on the face, chest, and abdomen of three stumptail macaques (Macaca arctoides) in a breeding colony of research animals. The lesions were multiple and appeared as white, crusted structures measuring 2 to 10 mm in diameter. These lesions were not associated with pruritus or other clinical symptoms. The mites were embedded in the epidermis and associated with mild hyperkeratosis. A few mononuclear leukocytes were present in the dermal and subcutaneous tissues.