This book provides an integrated analysis of gastritis. The term Gastritis was first coined around 150 years ago, yet its etiology and prognosis has changed as medical complications related to gastritis are in the focus of distinct sub-disciplines like gastroenterology, immunology, genetics, biology, etc. This book highlights information regarding the history of gastritis terminology, epidemiology, distinct research and clinical techniques applied to the background studies and the molecular pathology, animal models, novel gastric mucosal endogenous defensive neural mechanism (capsaicin-sensitive afferentation), biochemistry and genetics concerned with the pathways from helicobacter pylori infection to development of gastric cancer. The targeted audience of this book includes internists, pathologists, pharmacologists, biologists, gastroenterologists, bacteriologists, geneticists, immunologists and other researchers interested in learning more about gastritis.