The Oxoid combination disk method for detecting extended-spectrum beta -lactamases (ESBLs) depends on comparing the inhibition zones of cefpodoxime (10-mug) and cefpodoxime-plus-clavulanate (10- plus 1-mug) disks. The presence of clavulanate enlarged the zones for all of 180 ESBL-producing klebsiellae by greater than or equal to5 mm, whereas zones for cefpodoxime-susceptible isolates and cefpodoxime-resistant isolates with AmpC and K1 beta -lactamases were enlarged by less than or equal to1 mm. Good discrimination was achieved with either the NCCLS or the British disk method.
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St Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, EnglandSt Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, England
Babini, GS
Yuan, MF
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St Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, EnglandSt Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, England
Yuan, MF
Livermore, DM
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St Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, EnglandSt Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, England
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St Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, EnglandSt Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, England
Babini, GS
Yuan, MF
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St Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, EnglandSt Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, England
Yuan, MF
Livermore, DM
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St Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, EnglandSt Bartholomews & Royal London Sch Med & Dent, Antibiot Grp, London E1 2AD, England