1. Scope and Basic Principles of Insect Pathology 2. History of Insect Pathology 3. Baculoviruses and Other Occluded Insect Viruses 4. RNA Viruses Infecting Pest Insects 5. Fungal Entomopathogens 6. Microsporidian Entomopathogens 7. Bacterial Entomopathogens 8. Wolbachia Infections in Arthropod Hosts 9. Protistan Entomopathogens 10. Nematode Parasites and Entomopathogens 11. Host Immune Defenses Against Microbial Invaders 12. Ecology of Behavioral Defenses Against Infection 13. Principles of Epizootiology and Microbial Control