Objective:To examine the effect of Banxia Xiexin decoction on the mRNA expression of main virulence factors of Helico- baeter pylori (HP) ( CagA,VaeA, and y - GGT) and to investigate the anti - HP mechanism of Banxia Xiexin decoction. Methods : An- tihaeterial test was performed by agar dilution to observe the inhibitory effect of Banxia Xiexin decoction on HP. The effect of Banxia Xiexin decoction on the mRNA expression of main virulence factors of HP (CagA,VaeA,and y- GGT) was evaluated by RT- PCR. Results :The minimal inhibitory con...