Antibiotic resistance is neither a surprising nor a new phenomenon. It is an increasingly worrisome situation, however, because resistance is growing and accelerating while the world’s tools for combating it decrease in power and number. In addition, the cost of the problemespecially of multidrug resistancein terms of money, mortality, and disability are also rising. This book summarizes a workshop on antimicrobial resistance held by the Forum on Emerging Infections. The goal of the Forum on Emerging Infections is to provide an opportunity for representatives of academia, industry, government, and professional and interest groups to examine and discuss scientific and policy dilemmas of common interest that are specifically related to research on and the prevention, detection, and management of emerging infections. Organized as a topic-by-topic synthesis of presentations and exchanges during the workshop, the book highlights lessons learned, delineates a range of pivotal issues and the problems they raise, and proposes some simplified ideas about possible responses.