Abstract
The description of H<i>pylori</i>in 1983 as a cause of peptic ulcer was a signal event in gastroenterology, and the ensuing decade has provided a vast amount of data relating to this organism. The evidence relating H<i>pylori</i>to peptic ulcer is multifaceted and unequivocal. The frequency of H<i>pylori</i>infection varies geographically. In the United States, H<i>pylori</i>infection increases from approximately 10% in patients at age 20 years to 50% in the sixth decade of life. In Asia, childhood infection is more common and the prevalence of H<i>pylori</i>infestation in young adults correspondingly higher. In this issue of theArchives, Lee et al report a 59% seropositivity rate for 136 adults without symptoms in Taiwan. For epidemiological studies, the most appropriate method of detection of H<i>pylori</i>is serological testing. Serum levels of IgG and IgA antibodies are significantly higher in H pylori—positive patients than in
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