Infectious diseases are one of the leading causes of death around the world and the third leading cause of death in the United States. The danger of terrorist activities related to the intentional spread of disease organisms or other toxic agents also increases concerns. Although much progress has been made in preventing and treating infectious diseases, new threats continue to emerge and old ones sometimes develop resistance to commonly used treatments. This book provides information about infectious diseases that can be spread through food and drinking water, by insects and animals, or by contact with microorganisms in the environment. These include botulism, E. coli, various forms of encephalitis, hantavirus, Legionnaire's disease, Lyme disease, mad cow disease, malaria, monkeypox, plague, rabies, salmonella, tetanus, and many others. Special sections focus on bioterrorism and current research initiatives. A glossary and directories of resources for more information are also included.