Marshall and Warren discovered that the organism was there in almost every patient with gastric ulcer and inflammation. Based on the results of their findings, they suggested that Helicobacter pylori are involved in the aetiology of these diseases. In fact, Helicobacter pylori cause over 90% of duodenal ulcers and about 80% of gastric ulcers. After this discovery, research has been deep.

This bacterium can be diagnosed by identification of the organism in biopsies, by antibody tests or by non-invasive breath test which recognizes bacterial production of an enzyme in the stomach. The use of antibiotics to eliminate Helicobacter pylori may lead to severe problems since bacteria and chronic inflammation of the stomach remains. Marshall, Warren and other researchers showed that patients could be cured from peptic ulcer by eradication of the bacteria from the stomach. Due to Marshall and Warren's discovery, peptic ulcer is no longer a chronic disabling disease...
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