Helicobacter pylori infection alters gastric microbiota structure and biological functions in patients with gastric ulcer or duodenal ulcer

Figure 2 Microbial composition in patients with Helicobacter pylori-positive gastric ulcer or Helicobacter pylori-positive duodenal ulcer and healthy individuals. A: Relative abundance of top 20 phyla; B: Relative abundance of top 20 species relative; C: Relative abundance of differential bacteria among groups; D: Specific taxa that most likely contributed to the differences among groups. Group A: Patients with Helicobacter pylori (H. pylori)-positive gastric ulcer; group B: Patients with H. pylori-positive duodenal ulcer; group C: H. pylori-negative healthy individuals. LDA: Linear discriminant analysis.