Objective To investigate the carcinogenetic and tumor promoting effect of concentrated Helicobacter pylori culture supernatant(CHCS).

• 目的观察大鼠胃粘膜在幽门螺杆菌（Hp）培养滤液长期作用下的组织学变化及其对大鼠实验性胃癌的促癌作用。