The oldest patient infected with cutaneous protothecosis

Human protothecosis is a rare achlorophyllic algal infection found in immunocompromised hosts; commonly those patients on glucocorticoids. Irradiation of the infection is uncommon, but has been previously attempted with antifungal therapy. We present a case of hard-to-heal wounds on an 89-year-old female patient taking glucocorticoids. A wound biopsy noted the wounds to be infected with Prototheca. The patient underwent operative debridement of her wounds, which began to improve and show signs of granulation. This report details the oldest known case of human protothecosis invasion, to our knowledge, and the successful treatment of a Prototheca infection by operative debridement.