Bacteriophages are considered as biological agents and their application as an appliance has been further enhanced in various areas of microbiology. Especially in drug design and advanced programs, phage and prophage genomics give an altogether new understanding in this field. This book provides knowledge on the organisms varying from their biology to their usage in agriculture and medicine. This book consists of a range of topics dealing with advancing technologies in this field, commencing with the biology and categorization of bacteriophages, discussing phage infections in industrial processes and their applications as therapeutic or biocontrol agents. This book will prove itself to be beneficial as a reference and resource for microbiologists, biotechnologists, agriculture, biomedical and sanitary engineers.