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Hp持续感染是胃癌发生的一个重要诱发因素。研究表明CagA阳性Hp菌株感染使胃癌发生危险性增加。本文对CagA阳性菌珠与胃癌前期病变萎缩、肠化相关性进行探讨。1 材料和方法1.1 材料 本文收集了1998年8月~1999年6月门诊及住院人80例（男49例，女31例，年龄19—65岁，平均年龄48
Hp persistent infection is an important predisposing factor for gastric cancer. Studies have shown that infection with the CagA-positive Hp strain increases the risk of gastric cancer. This article discusses the correlation between CagA-positive bacterial bead and atrophic and intestinal metaplasia of precancerous lesions. 1 Materials and methods 1.1 Materials This article collected 80 cases of outpatients and inpatients from August 1998 to June 1999 (49 males and 31 females, aged 19-65 years old, mean age 48