This comprehensive, edited volume provides a summary of the latest research on novel antimicrobial compounds derived from various sources, concentrating primarily on natural products as a source of bioactive compounds that may be active against multidrug resistant pathogens, an alternative to more established antibiotics. It focuses on plant products containing antimicrobial molecules that might be active against bacteria, fungi, protozoan and viruses. The book consists of approximately 20 chapters with experts from around the world contributing to each chapter.