The image features a plate culture of Exserohilum rostratum, a fungus, which causes Phaeohyphomycosis. Phaeohyphomycosis is a group of fungal infections characterized by superficial and deep tissue involvement caused by dematiaceous, dark-walled fungi that form pigmented hyphae, or fine branching tubes, and yeast-like cells in the infected tissues (image by Dr. George R. Healy, Center for Disease Control and Prevention, USA and obtained via the CDC Public Health Image Library , ID#318); image modified by MIC. The cover is published under the Creative Commons Attribution (CC BY) license.