S. Bengtsson, C. Bjelkenbrant, G. Kahlmeter 

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Validation of EUCAST zone diameter breakpoints against reference broth microdilution  S. Bengtsson, C. Bjelkenbrant, G. Kahlmeter  Clinical Microbiology and Infection  Volume 20, Issue 6, Pages O353-O360 (June 2014) DOI: 10.1111/1469-0691.12414 Copyright © 2014 European Society of Clinical Infectious Diseases Terms and Conditions

Fig. 1 EUCAST disc diffusion inhibition zone diameter histograms displaying the zone diameter (bars) and broth microdilution MIC value (colour code) for each isolate, (a) Enterobacteriaceae (see Table 1 for list of species) versus aztreonam (categorical agreement (CA) 91.6%). The zone diameter breakpoints for Enterobacteriaceae are S >27 and R <24 mm (corresponding to clinical breakpoints of S <1 mg/L, R >4 mg/L). (b) Enterobacteriaceae (see Table 1 for list of species) versus ciprofloxacin (CA 97.9%). The zone diameter breakpoints for Enterobacteriaceae are S >22 and R <19 mm (corresponding to clinical breakpoints of S <0.5 mg/L, R <1 mg/L). (c) Enterobacteriaceae (see Table 1 for list of species) versus cefuroxime (CA 99.4%). The zone diameter breakpoints for Enterobacteriaceae are S>18 and R <18 mm (corresponding to clinical breakpoints of S <8 mg/L, R >8 mg/L). Clinical Microbiology and Infection 2014 20, O353-O360DOI: (10.1111/1469-0691.12414) Copyright © 2014 European Society of Clinical Infectious Diseases Terms and Conditions