This test is used to find out IgA antibodies which develop in the body in response to infection with bacteria Helicobacter Pylori (H. Pylori) bacteria. This bacteria mostly found in the stomach. It weakens the stomach's natural protective lining making it more prone to damage from gastric acid. This can lead to the formation of stomach ulcers and with time, chronic gastritis and it also increases the risk of developing stomach cancer.This test aids in the diagnosis of acute and chronic H pylori infections in patients having gastric and duodenal disease.