Book excerpt: Offers the latest insights into the fundamental biology and pathogenesis of A. fumigatus. Provides a combined synopsis of both A. fumigatus and its diseases and therapies. Encompasses the most up-to-date knowledge to serve as a resource guide for the next decade of study on this organism and the many diseases it causes. Covers the fundamental biology of A. fumigatus including specific features in genetics, biochemistry, and cell biology that can explain the virulence of this opportunistic pathogen. Discusses the wide range of clinical infection, plus the latest diagnostic and treatment strategies, in specific patient populations.