Although the incidence of Helicobacter infection has been declining for the past decades, it is still one of the most common infectious disease all over the world. Over 50,000 research articles have been published so far and lots of studies are on-going. Most of previously published books dealt with so many issues and it is somewhat hard for the reader to apply in real world clinical practice. Since clinicians do not have enough time to read the book from head to the end, this book presents algorithms, tables, and figures at the end of each chapter to provide a brief summary for clinicians, so that they can use this book as a reference in a short time in clinical practice. Readers will find up-to-date information and guidance on diagnosis and different types of treatments.