Fig. 1From: Helicobacter pylori infection in the stomach induces neuroinflammation: the potential roles of bacterial outer membrane vesicles in an animal model of Alzheimer’s diseaseHelicobacter pylori (HP) and gastric/extra-gastric diseases. A Electron micrograph of HP, a spiral-shaped bacterium with multiple polar flagella at a single pole; the length is 2.5–4 μm and diameter is 0.3–0.5 μm. B HP features and diseases in the stomach. C HP-related extra-gastric diseases can be categorized into four groups based on the pathophysiologyBack to article page