Strains which isolated from 4 duodenal ulcer patients with H. pylori infection before treated with triple therapy and one year after eradication were tested by this method to confirm recrudescence and reinfection.

• 对4例十二指肠溃疡伴hp感染者在三联治疗前后及根除后一年内再现的hp菌株进行RAPD分析,鉴别复发和再感染。