Saccharomyces boulardii in addition to antofloxacin-based bismuth quadruple therapy for Helicobacter pylori eradication

<p><em>Hpylori</em> is a gram-negative bacterium colonized in gastric mucosa. Currently, the infection rate of <em>H. pylori</em> in China is about 50%,&nbsp;which is not only closely related to a variety of digestive system diseases, but also induces a series of immune responses to other systems.</p>