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Helicobacter pylori is a type of bacteria
that is a major cause of stomach (gastric) and upper small intestine (duodenal)
ulcers. Infection with H. pylori may also increase the
risk of stomach cancer.
H. pylori bacteria can cause ulcers by
growing in the lining of the stomach, producing inflammation and causing the
stomach and intestinal lining to be more easily damaged by stomach acid. But most people
infected with H. pylori do not develop ulcers. An additional factor (such as stress)—one that cannot always be identified—may be
needed to cause an ulcer to form.
H. pylori bacteria can be eliminated by
taking certain antibiotics that are specifically directed at this
Current as of:
November 14, 2014
E. Gregory Thompson, MD - Internal Medicine & Jerome B. Simon, MD, FRCPC, FACP - Gastroenterology
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