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The World in Medicine
September 15, 2004

Helicobacter pylori

JAMA. 2004;292(11):1294. doi:10.1001/jama.292.11.1294-b

Although Helicobacter pylori infects nearly half the world's population, most remain asymptomatic, suggesting the existence of a natural defense against H pylori–associated peptic ulcer and gastric malignancies. Now, scientists from Japan and the United States have discovered that a chemical secreted in deeper portions of the stomach lining may play a role in curbing the bacterium's pathogenic effects (Science. 2004;305:100-103) .