The bacteria can be the cause of various diseases in the gastrointestinal area:
Chronic gastritis: 80 percent of all chronic gastritis are bacterial and have mostly developed from a Helicobacter pylori infection.
Gastric and duodenal ulcers: About 75 percent of all gastric ulcers and almost all duodenal ulcers are due to infection with Helicobacter pylori.
Gastric cancer: Changes in the gastric mucosa can lead to the development of gastric cancer. Colonization with Helicobacter pylori is therefore a risk factor for the development of this type of cancer.