Fungicidal action of the combination of posaconazole (PCZ) with the heat shock protein 90 inhibitor (17-demethoxy-17-(2-propenylamino) geldanamycin, 17AAG) against S. prolificans germlings as depicted by the morbidity dye DiBAC (original colors were modified for cover design). Picture by Fazal Shirazi and Dimitrios P. Kontoyiannis (The University of Texas MD Anderson Cancer Center, USA). The cover is published under the Creative Commons Attribution (CC BY) license.