Zone diameter distributions from EUCAST

Link to the website with disk diffusion

The EUCAST (European Committee on Antimicrobial Susceptibility Testing) under the auspices of the ESCMID (European Society for Clinical Microbiology and Infectious Diseases) offers this free website of distributions of MIC-values of wild type bacteria and fungi. Each MIC-distribution is defined by the micro-organism and the antimicrobial drug. It is the compound result of a number of separate distributions submitted to EUCAST from organisations such as national breakpoint committees, pharmaceutical industry, antimicrobial resistance surveillance programs and research projects. The database is released for public use, drug by drug, by the EUCAST steering committee and thereby also by the national breakpoint committees. The distributions are used by the committee for defining epidemiological cut-off values for early detection and surveillance of resistance development, and for the harmonisation of European clinical breakpoints.

Each graph contains information on the number of sources of data, the total number of organisms, and when defined by EUCAST, clinical breakpoints (S ≤ X mg/L and R > Y mg/L) and/or the epidemiological cut-off value. The epidemiological cut-off value is related to the MIC distribution of the wild type organism and categorized as WT < Z mg/L.