GIDEON Guide to Medically Important Yeasts summarizes the status of 117 yeast taxa identified in clinical material. It is one in a series of GIDEON ebooks which explore all individual infectious diseases, drugs, vaccines 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.Chapters are arranged alphabetically, by taxon (organism name). Each chapter is divided into the following sections:- Distinguishing phenotypic characteristics- Ecology and relevance to human disease- Drug susceptibility where relevant- Synonyms and prior taxonomic designations- Phenotype