RESUMO
Aim To study the relationship between Helicobacter pylori (H. pylori) infection and genetic factor-ABO blood group. Methods 177 cases of peptic ulcer were studied, including 127 cases with H. pylori infection in Group A and 50 cases without H. pylori infection in Group B. The percentages of ABO blood group in two groups were compared each other and were compared with that of the control group(the material of ABO blood group percentages of the people in the easten China) respectively. Results ①The percentage of blood group O in group A(53. 54％) was significantly higher than that of the control (P＜0. 01). ②No significant difference was observed between Group B and the control(P＞0.05) or Group A(P＞0. 05). Conclusion There is the relationship between H. pylori infection and blood group O.