Helicobacter pylori is a Gram-negative bacterium that has been associated with diverse pathologies of varying severity, such as chronic gastritis, peptic ulcer, mucosa-associated lymphoid tissue (MALT) lymphoma, and gastric Although most infected persons remain asymptomatic, 15–20% of H. pyloripositive individuals will develop the associated diseases. This could be dependent on environmental factors, host genetic factors or specific properties of the