This chapter contains sections titled:

• Introduction

• The Genus Helicobacter

• Epidemiology

• Helicobacter Species and Human Disease

• Microbiology of H. Pylori

• Genome, Genomics and Genetic Diversity

• Gene Regulation

• Pathogenesis

• Diagnosis of H. Pylori

• Treatment of H. Pylori

• Prevention and Eradication of H. Pylori by Vaccines

• References