The method of PCR was applied to amplify ureBgene fragment and another unidentified fragment from Hh infected humanand from Hh-Iike Helicobacter infected dog, and the unidentified fragmentswere sequenced.

• （3）应用PCR方法扩增来源于人胃的Hh和来源于狗胃的Hh类似菌的尿素酶B片段以及另一未知片段，并对未知片段进行测序。