PCR was not only positive in 22 calculi in which Proteus mirabilis was discovered by urine culture, but also in 2 cases with negative urine culture.

• 于阳性聚合酶链反应的尿石中，22个尿石的尿液培养同时含变形杆菌，此外2个阴性尿液养结果的尿石也呈阳性聚合酶链反应。