This text presents a comprehensive review of the range of infectious complications that can arise in oncology patients as a result of their underlying malignancy, as well as from their treatment. The first section considers the effects of different treatment strategies on various host defenses. The second section describes the various infectious syndromes and addresses types of pathogens, shifts over time and changing diagnostic considerations. The final section discusses adjunctive measures that can prevent and assist antimicrobial agents in infection control. The book offers practical advice for practicing oncologists, hematologists and infectious disease specialists.