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

Figure 1 Alpha diversity and beta diversity of patients with Helicobacter pylori-positive gastric ulcer or Helicobacter pylori-positive duodenal ulcer and healthy individuals. A: Chao1 index; B: Shannon index; C: Principal co-ordinates analysis; D: Analysis of similarities by Bray-Curtis distances among three 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.