Objective To detect the levels of gastrin-17( G-17),pepsinogen I( PG-Ⅰ) and pepsinogen Ⅱ( PG-Ⅱ) in serum of patients with Helicobacter pylori infection,and to evaluate the relationship between the occurrence of Helicobacter pylori infection and serum levels. Methods Serum was collected from cases of 41 male and 44 female with positive Helicobacter pylori,and 44 male and 41 female with negative Helicobacter pylori. Serum levels of G-17,PG-Ⅰ and PG-Ⅱ were quantitatively detected by ELISA. Results The serum le...