A significant achievement of modern medicine, at the end of the last XX century, in the issue of pathological diseases of the gastrointestinal tract and their role in the life of organisms, was the discovery of H. pylori. H. pylori is a new slow therapeutic infection mainly affecting the stomach and duodenum. In 2020, the World Health Organization (WHO) registered 1.09 million people in the world with stomach cancer and 769,000 deaths due to stomach cancer. According to the WHO and the Maastricht Accords, H. pylori is one of the main factors in the development of diseases of the gastrointestinal tract and stomach cancer. According to epidemiological data, 60% of the population of the Earth are infected with this microorganism. The bacterium H. p ylori is involved in the development of diseases such as chronic gastritis, gastric ulcer and duodenal ulcer, mucosal - associated lymphoid tumor (MALT-lymphoma) of the stomach, and gastric adenocarcinoma.