Bacterial infections in animals are recognized as a leading cause of morbidity and mortality throughout the world. Pathogenic bacteria routinely command a broad spectrum of niches in the animal host, making an understanding of pathogenesis mechanisms crucial to the development of improved diagnostics, prophylactics and treatment for bacterial diseases. In this book, latest available knowledge and information are presented for understanding specific mechanisms of pathogenesis for a wide range of bacteria. The book has several chapters each one devoted to the pathogenesis of several bacterial diseases common in Indian perspective. The book will prove an invaluable collection for microbiologists, immunologists, cell biologists and infectious diseases clinicians – and indispensable to all science researchers interested in studying pathogenic bacteria and related diseases processes. The book will prove useful to the students of MVSc, MSc and PhD pursuing research in the field of Veterinary Bacteriology.