Helicobacter pylori infection (patient information)

	Helicobacter pylori infection
Overview
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What are the causes?
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Yamuna Kondapally, M.B.B.S [2]

Overview

Helicobacter pylori infection is an acute or chronic illness caused by infection of the stomach with the bacterium H. pylori. The infection is mostly without symptoms. Approximately half of worlds population are infected with H. pylori. The disease is characterized by dyspepsia, gastritis, peptic ulcer disease, adenocarcinoma of stomach or MALT lymphoma.