Keywords Helicobacter pylori;Cytotoxin associated protein A gene;Quantitative polymerase chain reaction;Escherichia coli;Dot immunogold filtration assay;

• 幽门螺杆菌;细胞毒素相关蛋白基因A;定量聚合酶链反应;大肠杆菌;斑点金免疫渗滤试验;