β-Lactamase Induction Antagonizes β-Lactam Susceptibilities inCitrobacter diversusandEnterobacter cloacaeClinical Isolates
B Oliva, Tea Taraborelli, Nicola Franceschini, Gianfranco Amicosante
Abstract
B Oliva, Tea Taraborelli, Nicola Franceschini, Gianfranco Amicosante
Abstract
Inducible beta-lactamases were obtained after exposure to several beta-lactams in clinical isolates of Enterobacter cloacae and Citrobacter diversus. Enzyme production was related to the inducer and medium composition. beta-lactamase is able to inactivate only labile compounds, thus generating minimum inhibitory concentrations higher than in the absence of the inducer; imipenem susceptibilities usually were not changed.
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Inducible beta-lactamases were obtained after exposure to several beta-lactams in clinical isolates of Enterobacter cloacae and Citrobacter diversus. Enzyme production was related to the inducer and medium composition. beta-lactamase is able to inactivate only labile compounds, thus generating minimum inhibitory concentrations higher than in the absence of the inducer; imipenem susceptibilities usually were not changed.
Key concepts: Enterobacter cloacae, Citrobacter, Imipenem, Inducer, Microbiology, Enterobacter, Enterobacteriaceae, Enzyme inducer