Helicobacter pylori (H. pylori) is one of the most important bacterium in the stomach, it was estimated to have infected half of the world’s population. It is a causative agent of human gastric mucosal infection with several gastro-duodenal diseases such as chronic gastritis, gastric ulcer, duodenal ulcer and gastric cancer，it is also associated with non-gastrointestinal diseases, like iron deficiency anemia. It was classified as a group I carcinogen by The International Agency for Research on Cancer (IARC) in 1994. Research on the association between Helicobacter pylori infection and gastrointestinal diseases, as well as non-gastrointestinal diseases, is of great significance. Although there are plenty of researches on Helicobacter pylori infection related gastrointestinal diseases as well as non-gastrointestinal diseases and we know a lot about Helicobacter pylori infection related gastrointestinal diseases as well as non-gastrointestinal diseases, still, there are much more need to be explored.

Helicobacter pylori infection is a specialty section of International Journal of Gastroenterology that aims to publish original research, reviews, meta-analyses, expert opinions and commentary on all aspects of Helicobacter pylori infection. Basic and clinical studies on Helicobacter pylori infection and gastrointestinal diseases as well as non-gastrointestinal diseases are of interest. Studies to explore novel methods to eradicate Helicobacter pylori infection without antibiotics will be particularly valued.