Table of Contents Epidemic Dengue and Dengue Hemorrhagic Fever: a Global Public Health Problem in the 21st Century 1. Hemorrhagic Fevers: How They Wax and Wane 2. Recurrent Emergence of Venezuelan Equine Encephalomyelitis 3. Flying Foxes, Horses, and Humans: a Zoonosis Caused by a New Member of the Paramyxoviridae 4. The Reemergence of Rabies 5. Emerging Human Ehrlichioses: Recently Recognized, Widely Distributed, Life-Threatening Tick-Borne Diseases 6. The Reemergence of Severe Group A Streptococcal Disease: an Evolutionary Perspective 7. Patterns in the Emergence of Epidemic Meningococcal Disease 8. Escherichia coli O157:H7 9. Bartonella: an Emerging Human Pathogen 10. Epidemic Diptheria in the Newly Independent States of the Former Soviet Union 11. A Convergence of Tick-Transmitted Diseases within the Lyme Disease Transmission Cycle 12. Helicobacter pylori and Gastroduodenal Disorders 13. The Changing Nature of Nontuberculous Mycobacteriology 14. Emerging Fungal Pathogens: Evolving Challenges to Immunocompromised Patients 15. Emerging Enteric Protozoa: Cryptosporidium, Cyclospora, and Microsporidia 16. Emerging and Reemerging Infections: the Critical Societal Determinants, Their Mitigation, and Our Responsibilities 17. Addressing the Challenges of Emerging Infectious Diseases: Implementation of the strategy of the Centers for Disease Control and Prevention