The book aim on the molecular characterization of various plasmids present in Shigella dysenteriae type 1. This organism was responsible for spreading epidemic in various continents of the world. Further, efforts have been made to include the contents which may help to manage the shigellosis throughout the world. If the book is properly followed then this will not only help the prevention of shigellosis but also diarrheal diseases, not only in developing world but also in developed countries. Research scholars, teachers and medical practitioners will really found this book a ready reference for their respective fields.