provides an up-to-date survey of iron transport systems in bacteria; details iron transport and its regulation in E.colias a prototype for iron transport systems in gram-negative bacteria; includes chapters on the major gram-negative, gram-positive and acid-fast bacterial pathogens - their iron transport systems and the roles of these systems in virulence; presents structural studies of siderophores, heme carriers, and iron transport proteins; discusses the ecology of siderophores and potential therapeutic uses of siderophores.