Helicobacter pylori is a Gram-negative bacterium that is considered a causative agent of peptic ulcer disease, gastric lymphoma, and gastric carcinoma. Helicobacter pylori triggers an intense leucocyte infiltration of the gastric submucosa, an action which is mediated by pro-inflammatory cytokines. This pathogenetic mechanism is common to many other diseases and consequently, Helicobacter pylor...