In a 10 years old girl sustaining a corrosive injury of the lower leg from sulphuric acid, in the region of a skin transplantation colonization with Aspergillus fumigatus (Fresenium) and Aspergillus niger (van Tieghem) took place. This infection endangered the attempt of transplantation and the saving of the foot. Treatment by medication with nystatin (moronal) and canesten (clotrimazol) were ineffective. Pimaricin (pimafucin, natamycin) quickly erradicated the mycotic infection and secured an undisturbed progress for the transplantation. Additionally the epidemiology of infections by Aspergillus is briefly discussed.