pylori infection, and the average relative abundance of Firmicutes showed an increasing trend in the group with previous H . pylori infection compared with the H . pylori -negative group.
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Helicobacter pylori may participate in the development of inflammatory bowel disease by modulating the intestinal microbiota.
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pylori infection has presented a decreasing trend (eg, in Hangzhou, China, the prevalence of H. pylori infection in juvenile individuals decreased from 21.6% to 17.2% between 2007 and 2014).