目的 研究临床分离的产超广谱β内酰胺酶(extended spectrum β lactamases,ESBLs)大肠杆菌对常用抗生素的耐药性及其基因类型.方法 应用双纸片扩散法及E test检测ESBLs;微量稀释法测定产ESBLs大肠杆菌对临床常用抗生素的耐药性;全自动核型分析和脉冲场凝胶电泳(pulsed field gel electrophoresis,PFGE)研究产ESBLs大肠杆菌
A detailed stratigraphic division is made in the late Pleistocene loess formation of the central Loess Plateau of China bv the studv of newly found Q_3 loess se