RT Book, Section A1 Alanio, Alexandre A1 McCarthy, Matthew W. A1 Walsh, Thomas J. A1 Kauffman, Catherine Lisa A1 Barnhill, Raymond L. A2 Barnhill, Raymond L. A2 Crowson, A. Neil A2 Magro, Cynthia M. A2 Piepkorn, Michael W. A2 Kutzner, Heinz A2 Desman, Garrett T. SR Print(0) ID 1178394346 T1 Fungal Infections T2 Barnhill's Dermatopathology, 4e YR 2020 FD 2020 PB McGraw Hill Education PP New York, NY SN 9780071828222 LK dermatology.mhmedical.com/content.aspx?aid=1178394346 RD 2024/04/25 AB The kingdom Fungi is a group of heterotrophic eukaryotic organisms composed of cells enclosed by a rigid cell wall containing ergosterol and chitin or other polysaccharides but usually not cellulose. Historically, mycology has often fallen under the discipline of botany, although fungi are more closely related to animals than to plants and are part of the eukaryotic crown group that diverged from each other roughly 1 billion years ago.1 Fungi may be unicellular, such as yeasts, or multicellular, forming long filaments known as hyphae. Hyphae are divided into cells by septa. Various reproductive structures producing conidia (spores) develop on hyphae; the morphology of these structures provides the traditional basis for identification in the mycology laboratory and for taxonomy. Some genera have the capacity to form yeast, hyphal forms, or both, depending on environmental conditions, a characteristic known as dimorphism.