| characterization of extended-spectrum beta-lactamase (esbl)-producing kuwait and uk strains identified by the vitek system, and subsequent comparison of the vitek system with other commercial esbl-testing systems using these strains. | two hundred and fifty-one unique patient isolates of klebsiella pneumoniae (123), escherichia coli (114), klebsiella oxytoca (7), enterobacter cloacae (5) and citrobacter freundii (2), flagged as extended-spectrum beta-lactamase (esbl) positive by the vitek system (gns-526 card), were collected. these strains were isolated from a variety of clinical specimens submitted to the clinical bacteriology laboratories of the royal infirmary of edinburgh (rie), edinburgh, uk (and associated gp practices) ... | 2006 | 16533989 |