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Susceptibility of multiresistant gram-negative bacteria to fosfomycin and performance of different susceptibility
L V Perdigão-Neto1, M S Oliveira, C F Rizek
1Department of Infection Control of Hospital das Clínicas, University of São Paulo, São Paulo, Brazil.
Abstract:
Fosfomycin may be a treatment option for multiresistant Gram-negative bacteria. This study compared susceptibility methods using 94 multiresistant clinical isolates. With agar dilution (AD), susceptibilities were 81%, 7%, 96%, and 100% (CLSI) and 0%, 0%, 96%, and 30% (EUCAST), respectively, for Acinetobacter baumannii, Pseudomonas aeruginosa, Klebsiella pneumoniae, and Enterobacter spp. Categorical agreement between Etest and AD for Enterobacteriaceae and A. baumannii was ≥80%. Disk diffusion was adequate only for Enterobacter. CLSI criteria for urine may be adequate for systemic infections.
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