| molecular characterization of extended-spectrum beta-lactamases in enterobacteriaceae from patients of two hospitals in saxony, germany. | between january and september 2003, 39 isolates of the family enterobacteriaceae with phenotypically positive vitek 1 extended-spectrum beta-lactamase (esbl) test results were collected, originating from patients of two hospitals in saxony, germany. plasmid dna was isolated and screened by pcr for the presence of genes encoding beta-lactamases of shv, tem and ctx-m types. to differentiate esbl and non-esbl among shv and tem genes, detailed analysis of pcr products was performed. twenty-four stra ... | 2007 | 17244807 |