H pylori, a stomach bacteria, causes ulcers and digestive issues. Know its symptoms, causes, and treatment H. pylori is a bacterium that attacks your stomach lining, causing peptic ulcers and gastritis. Learn more about the treatments for the infection. H. pylori are bacteria that disrupt your stomach’s protective lining and cause peptic ulcers. You can treat infections with antibiotics. H. pylori (Heliobacter pylori) is a type of bacteria that infects your stomach. It can damage the tissue in your stomach and the first part of your small intestine (the duodenum). In some cases it can also cause painful sores called peptic ulcers in your upper digestive tract. H. pylori is a type of bacteria that can cause an infection in your stomach. If you develop an H. pylori infection, you may not have any signs or symptoms. But it can lead to peptic ulcers. H. pylori infections occur across the world due to exposure to saliva or stool in contaminated water or food. Learn how the bacterium is spread and treated with antibiotics. Diagnosis of an H. pylori infection involves testing to find out if your symptoms are caused by H. pylori germs. Your healthcare professional may recommend one or more of the following tests: A lab checks a sample of your stool for signs of H. pylori germs. These tests include: Stool antigen test. H. pylori is a common bacteria that may cause pain and increase the risk of ulcers or stomach cancer. Learn about symptoms, complications, and more. Helicobacter pylori is a species of gram-negative bacteria in the Helicobacter genus. [27] About half the world's population is infected with H. pylori, but only a few strains are pathogenic. H pylori is a helical bacterium having a predominantly helical shape, also often described as having a spiral or S shape. [28][29] Its helical shape is better suited for progressing through the viscous. A Helicobacter pylori infection is a common stomach infection. It's caused by a germ called Helicobacter pylori, a bacteria also known as H. pylori. More than half the people in the world may have an H. pylori infection at some point in their lives. These infections often happen during childhood.