Helicobacter pylori (Hp) is a gram negative, spiral shaped bacterium which colonizes the gastric mucosa and induces gastroduodenal complications varying from mild gastritis with no clinical complications to peptic ulcer diseases and even gastric malignancies. The rate of Hp infection is 30 50% in developed countries whereas it has been rated up to 80% of the adult population in developing countries like Iran. Hp infection can be detected by various diagnostic methods. Culturing biopsy spec...