Journal
WORLD JOURNAL OF GASTROENTEROLOGY
Volume 20, Issue 21, Pages 6386-6399Publisher
BAISHIDENG PUBLISHING GROUP INC
DOI: 10.3748/wjg.v20.i21.6386
Keywords
Helicobacter pylori; Virulence factor; Host factors; Gastroduodenal diseases; Extraintestinal disorders
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Helicobacter pylori (H. pylori) infects more than half of the world's human population, but only 1% to 3% of infected people consequently develop gastric adenocarcinomas. The clinical outcome of the infection is determined by host genetic predisposition, bacterial virulence factors, and environmental factors. The association between H. pylori infection and chronic active gastritis, peptic ulcer disease, gastric cell carcinoma, and B cell mucosa-associated lymphoid tissue lymphoma has been well established. With the exception of unexplained iron deficiency anemia and idiopathic thrombocytopenic purpura, H. pylori infection has no proven role in extraintestinal diseases. On the other hand, there is data showing that H. pylori infection could be beneficial for some human diseases. The unpredictability of the long-term consequences of H. pylori infection and the economic challenge in eradicating it is why identification of high-risk individuals is crucial. (C) 2014 Baishideng Publishing Group Inc. All rights reserved.
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