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Volume 7, Number 2—April 2001
4th Decennial International Conference on Nosocomial and Healthcare-Associated Infections
State of the Art

Controversies about Extended-Spectrum and AmpC Beta-Lactamases

Kenneth S. ThomsonComments to Author 
Author affiliation: Creighton University School of Medicine, Omaha, Nebraska, USA

Main Article

Table 1

Example of false-negative, clavulanate-based test for detecting extended-spectrum beta-lactamases with an isolate producing an inducible AmpC beta-lactamasea

Isolate Test agent MIC (µg/mL)
SHV-2-producing Enterobacter cloacae Ceftazidime alone 2

Ceftazidime + 4 µg/mL clavulanate
aSource: Thomson KS, Moland ES, Sanders (40).

Main Article

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