Helicobacter pylori (H. pylori) is a spiral bacteria that specifically and selectively resides beneath the mucus layer next to the stomach (gastric cells).

Helicobacter pylori infection has been associated with the occurrence of gastritis and peptic ulcers. Chronic H. pylori gastritis is a strong risk factor for stomach cancer. However, less than one percent of chronically infected individuals will develop stomach cancer.

In the past, one of the strongly held notions is that acid is the primary...