| per-1 production in a urinary isolate of providencia rettgeri. | a providencia rettgeri strain resistant to extended-spectrum cephalosporins and intermediate to aztreonam was isolated from the urine of a patient hospitalized in the urology clinic of ssk educational hospital in ankara. clavulanic acid restored the activity of extended-spectrum cephalosporins, suggesting that the strain was harboring an extended-spectrum beta-lactamase. since the per-1 enzyme is widespread in turkey, and had been already detected in a related species such as proteus mirabilis, ... | 2004 | 15332708 |