GIDEON Guide to Medically Important Yeasts and Algae summarizes the status of 130 taxa of yeasts and algae identified in clinical material.Chapters are arranged alphabetically, by taxon (organism name). Each chapter is divided into the following sections:Distinguishing phenotypic characteristicsEcology and relevance to human diseaseDrug susceptibility where relevantSynonyms and prior taxonomic designationsPhenotypeThis is one in a series of GIDEON ebooks which explore all individual infectious diseases, drugs, vaccines, outbreaks, surveys and pathogens in every country of the world. Data are based on the GIDEON web application (gideononline.com) which relies on standard textbooks and peer-review journals, supplemented by an ongoing search of the medical literature.