Helicobacter pylori Antigen in Stool is a laboratory test used to detect the presence of Helicobacter pylori bacteria, a major cause of stomach problems including gastritis and ulcers. A stool sample is collected and analyzed in the laboratory to identify specific antigens related to the bacteria. This test is a noninvasive and effective method for diagnosing the infection and is often preferred over procedures such as endoscopy. It helps evaluate the health of the digestive system and guides appropriate treatment, whether with antibiotics or other therapies. It is recommended when symptoms such as stomach pain, nausea, or loss of appetite appear, or when there is a family history of stomach issues.