disease has infectious agent infectious disease Helicobacter pylori infectious disease Helicobacter pylori caused disease or disorder Helicobacter pylori infection, susceptibility to Helicobacter infection Infections with organisms of the genus HELICOBACTER, particularly, in humans, HELICOBACTER PYLORI. The clinical manifestations are focused in the stomach, usually the gastric mucosa and antrum, and the upper duodenum. This infection plays a major role in the pathogenesis of type B gastritis and peptic ulcer disease. infections, Helicobacter MONDO:0006781 infection, Helicobacter Helicobacter pylori disease or disorder EFO:1000961 MESH:D016481 gram-negative bacterial infections Helicobacter pylori