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A meta-analysis in the October issue of Cancer Prevention Research finds that, while H. pylori causes stomach cancer, people with strains carrying a gene called CagA were almost half as likely to develop esophageal adenocarcinomas. As antibiotics have made H. pylori less common (reducing stomach cancer incidence), Islami and Kamangar suggest that these declining rates of H. pylori in developed populations may be partly responsible for an increase in esophageal adenocarcinomas. [See also the accompanying Perspective below.]
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