Expected Phenotypes Expected phenotypes refer to the expected results of susceptibility tests without testing. For a species to be included in the “expected resistant phenotype”, 90% or more should be considered resistant (e.g. Klebsiella pneumoniae vs. ampicillin). For a species to be included in…
Get to know moreFor many years EUCAST and other committees have struggled with the term “intrinsic resistance”. There is no agreed definition and since breakpoints are always “exposure dependent” it is hard to agree on a definition which will survive changes in dosing, modes of administration and a sudden…
Get to know moreImportant Additional Information Expected phenotypes, expert rules, and detection of resistance mechanisms are important complements to susceptibility testing and should be consulted before releasing results. Expected phenotypes help with validation of identification and susceptibility tests. Expert…
Get to know moreBacteria Most of EUCAST’s work is dedicated to defining breakpoints for bacteria that cause infections in humans. How to Use This Section: This page gives you access to information and services related to pathogenic bacteria. Important: All resources here are complementary. Please review them…
Get to know moreThe first and very important question is, when are there no breakpoints in the EUCAST breakpoint tables? Look for guidance on the interpretation of test results in breakpoint tables , expert rules and in EUCAST advice on expected phenotypes . In breakpoint tables guidance can be in the form of…
Get to know moreResistance Detection Successful treatment of infectious diseases relies on knowledge and understanding of when antimicrobial resistance is an expected phenotype of the organism, and when resistance to antimicrobial agents may develop. The following documents provide up-to-date advice on how to…
Get to know moreSitemap EUCAST - Home About EUCAST Organisation Steering Committee General Committee EUCAST Statutes National AST Committees (NAC) Network Laboratories Development Laboratories (EDL) Subcommittees Antimycobacterial Susceptibility Testing (AMST) Antifungal Susceptibility Testing (AFST) Veterinary…
Get to know moreClinical Breakpoint Tables Breakpoints are part of a system for categorizing microorganisms as: Susceptible (S) Susceptible, increased exposure (I) Resistant (R) To antimicrobial agents approved for use in the treatment of infectious diseases. Information of the structure of the tables and how they…
Get to know moreMethodology and Instructions Here you find information on the EUCAST disk diffusion methodology and on MIC testing: Testing Instructions, Quality Control (QC) and Warnings. In addition, Warnings are issued by EUCAST for commercially available products, which are not performing to the expected…
Get to know moreThe EUCAST breakpoint tables are part of a system for categorising microorganisms as susceptible (S and I) and resistant (R) to agents approved for use in the treatment of infectious diseases. Breakpoint tables are freely available but we would like to remind users of other parts of the system which…
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