Which of the following patient is most likely to harbor a Helicobacter pylori infection in the stomach?
Correct Answer: A 60-year-old Pakistani
Description: The most important risk factors for H. pylori infection include older age, low income, and residence in a developing country. It is believed that infection generally is acquired in childhood. Although humans are the major reservoir of H. pylori, the route of infection is unclear, with fecal-oral and oral-oral spread both being possible. H. pylori is endemic in only 30% of Americans, but prevalence rates are as high as 80% in developing countries. Infection with a related species, H. heilmanii, is about 1% as common as H. pylori infection.
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