This book provides a concise but comprehensive description of human infectious diseases due to microbial pathogens, from a physicians and a microbiologists point of view, as well as providing an understanding of the use of microbial pathogens as biological weapons. It is indispensable for students, physicians, medical and nursing staff, and infectious disease specialists. All topics are covered in a concise fashion, which also are useful for self-study and life-long learning (applicable for part-time students).