A case of feline phaeohyphomycosis due to Fonsecaea pedrosoi

The first report of a case of feline phaeohyphomycosis due to Fonsecaea ped rosoi is presented. Fonsecaea pedrosoi is an aetiologic agent of both human phaeohyphomycosis and chromoblastomycosis. In our cat, the lesion was conf ined to the skin and appeared as a firm swelling on the bridge of the nose. Diagnosis was based on histological examination of a cutaneous biopsy and fungal culture of a tissue sample on Sabouraud's dextrose agar. Further dia gnostic tests failed to reveal an underlying immunosuppression. Two treatme nt cycles with itraconazole, at the oral dose of 5 mg kg(-1) given twice da ily, induced complete clinical remission, but relapses occurred.