The awareness of Helicobacter pylori in gastronitestinal diseases has increased greatly since Marshall and Warren described the presence of Campylobacter-like organisms in the antral mucosa of patients with histological evidence of antrum gastritis and peptic ulcers, especially duodenal ulcers. The strong correlation between the presence of H. pylori and histologically confirmed gastritis, peptic ulcer disease and gastric carcinoma, as well as disease resolution after H. pylroi eradication, indicates a causative relationship. Sorry, this test is not available to residents of New York and Maryland. Any orders originating from the state of New York or Maryland will automatically be canceled. Any samples originating from the state of New York or Maryland will be discarded.