Surgical exploration revealed an intraosseous cavity filled with a black, homogeneous, gelatinous substance thought to be foreign material, but which was diagnosed histologically as containing black yeasts. Cultivation of a microbiologic sample for 6 wk grew black yeast-like colonies. The yeast isolate was identified as an Aureobasidium species different from the typical A. pullulans . Also, examination with respect to dermatologic manifestations gave negative results. Six months postoperatively bone regeneration was satisfactory radiologically.
Heavy arrows indicate budding forms.
Isolated Aureobasidium sp. Sabouraud agar slide culture showing blastoconidia typical of Aureobasidium.