Aspergillus is one of the most important fungal genera for the man, for its industrial use, its ability to spoil food and not least
its medical impact as cause of a variety of diseases. Currently hundreds of species of Aspergillus are known; nearly fifty of them are able
to cause infections in humans and animals. Recently, the genus Aspergillus is subdivided into 8 subgenera and 22 sections. The spectrum
of diseases caused by Aspergillus species varies from superficial cutaneous to invasive and systemic infections. All species of Aspergillus
investigated so far are resistant against the antifungals fluconazole and 5-fluorocytosine, the range of susceptibilities to currently
available antifungals is discussed in this paper.