03 November 2020

The European Committee on Antimicrobial Susceptibility Testing - EUCAST

Invitation to EUCAST webinars with live discussion

EUCAST will arrange a series of web-based live updates and discussion forums. It is free and available to anyone with an interest in EUCAST guidelines and developments. Each meeting will last 60 minutes, will have a theme and one or two short presentations but 15-30 minutes will be set aside for Q&A and discussion. Dates, times and links are posted below. There is currently a limit at 300 participants per zoominar. One of each zoominar will be recorded and a link posted on the EUCAST website. Each meeting will be repeated three times during zoominar days, 8.00, 13.00 and 16.00 (CET). 


If there are unanswered questions during the meeting - use the EUCAST subject related contact form.


1. EUCAST General Update. Wednesday 11 November the seminar was repeated at 8.00, 13.00 and 16.00 and altogether more than 300 colleagues attended. One of the three seminars was recorded and can be seen either on Youtube or here. The file used for the presentation is here.


2. EUCAST new definitions of S, I and R, the correlation between breakpoints and dosing/exposure. Friday 20 November 8.00, 13.00 and 16.00 (CET). Between 100 and 150 colleagues attended each of the three zoominars. A link to one of them will shortly be available. The presentation used during the zoominar is here. 

A recording of the zoominar on "The EUCAST new I" is here.


3. EUCAST Area of Technical Uncertainty (ATU), Monday 30 November 8.00, 13.00 and 16.00 (CET).

The presentation used during the zoominar is here.

A recording of the zoominar on "The EUCAST ATU" is here.


4. EUCAST MIC and zone diameter distributions and ECOFFs.

Monday 7 December 8.00 - 9.30 and 12.00 - 13.30 (CET) - NB. these times are different than those used for seminar 1 - 3. John Turnidge (Adelaide, AUS) and Gunnar Kahlmeter (Växjö, Sweden) will discuss MIC and zone distributions, the determination of ECOFFs, the new software (recently released).

Link invitations for these events are in this document. 



EUCAST is a standing committee jointly organized by ESCMID, ECDC and European national breakpoint committees. EUCAST was formed in 1997. It has been chaired by Ian Phillips (1997 - 2001), Gunnar Kahlmeter (2001 - 2012), Rafael Canton 2012 - 2016) and Christian Giske (2016 - ). Its scientific secretary is Derek Brown (1997 - 2016) and John Turnidge (2016 - ). Its webmaster is Gunnar Kahlmeter (2001 - ). From 2016, Rafael Canton is the Clinical Data Co-ordinator and from 2012, Gunnar Kahlmeter is the Technical Data Co-ordinator and Head of the EUCAST Development Laboratory.

Since the very beginning, Johan Mouton, was important to EUCAST in that he was an ardent supporter of European harmonisation and of bringing PKPD to bear on breakpoint setting. Johan died in the evening of Tuesday 9 July, 2019 .The Steering Committee meeting 8 - 9 of July was the only meeting since 2002 to which Johan could not travel.  We shall miss Johan for his courage and his passion for getting it right! Some of our memories of Johan are on the ESCMID website.


The EUCAST Development Laboratory for antibacterial agents is located in Sweden and can be addressed through gunnar.kahlmeter[at]eucast.org or erika.matuschek[at]eucast.org.


The EUCAST Development Laboratory for antifungal agents is located in Denmark and can be addressed through maca[at]ssi.dk.


For EUCAST subcommitteessee page Subcommittees.


EUCAST deals with breakpoints and technical aspects of phenotypic in vitro antimicrobial susceptibility testing and functions as the breakpoint committee of EMA and ECDC. EUCAST does not deal with antibiotic policies, surveillance or containment of resistance or infection control. The Steering Committee is the decision making body. It is supported by a General Committee with representatives from European and other countries.


Consultation! The EUCAST consultation process is publicly available on the EUCAST website. All major decisions are subject to 4 - 12 weeks of consultation.  


Warnings! Users of EUCAST guidelines are encouraged to make EUCAST aware of malfunctioning AST material and devices. Investigations into such reports sometimes result in an official EUCAST Warning which is then posted on the EUCAST Warnings website. 


Since 2019, all European countries are on European guidelines and from 2020, ECDC will only accept "data for surveillance purposes" generated by laboratories on EUCAST breakpoints and methods.

Many countries outside Europe have also decided to follow EUCAST guidance.


Breakpoints for new agents are set as part of the licensing process for new agents through EMA or national medicines agencies. EUCAST breakpoints are available in devices for automated susceptibility testing but with some limitations, depending on the system.


EUCAST develops a disk diffusion susceptibility test method calibrated to EUCAST MIC breakpoints. New agents rapidly obtain zone diameter breakpoint correlates but there are some limitations. Previous disk diffusion tests from the Swedish, French and British committees have been abandoned and laboratories advised to switch to EUCAST recommended methods.

Anyone with an interest in antimicrobial agents in general and antimicrobial breakpoints in particular is invited to contact EUCAST, ESCMID or one of the National Breakpoint Committees. Use the EUCAST subject related contact form.


To cite the EUCAST website or a document on the EUCAST website: List the document name, version, year and the full web adress. For example, if you want to refer to the current EUCAST breakpoint table, the citation reads "The European Committee on Antimicrobial Susceptibility Testing. Breakpoint tables for interpretation of MICs and zone diameters, version 10.0, 2020" (or another relevant version and year). http://www.eucast.org/clinical_breakpoints/.



In English: The copyright of all documents, data, presentations and videos published on the EUCAST website remains with EUCAST. All are freely available for re-use if reference to the EUCAST website is given and they are not resold.
Any secondary publication of documents, data, presentations and videos must be referenced with the declaration that "These data have (or this document, presentation or video has) been produced in part under ECDC service contracts and made available by EUCAST at no cost to the user and can be accessed on the EUCAST website
www.eucast.org. EUCAST recommendations are frequently updated and the latest versions are available at www.eucast.org."


En Français: Les droits d’auteurs de tous les documents (présentations, vidéo) établis par l’EUCAST et publiés en ligne sur le site de l’EUCAST restent la propriété de l’EUCAST.  Ces documents (présentation, vidéo) sont libres d’accès et gratuits. Ils peuvent  être utilisés à condition d’indiquer la référence du site EUCAST ; par contre, il n’est en aucun cas permis de les revendre.
 Toute publication se référant à ces données doit comporter la mention suivante “ces données ont été produites par l’EUCAST, notamment lors de collaborations avec l’ECDC. Elles sont accessibles librement et gratuitement grâce au  site de l’EUCAST
www.eucast.org. Les recommandations de l’EUCAST sont fréquemment mises à jour et les dernières versions sont accessibles sur www.eucast.org."



This page was last edited June, 2020














Chairman: Christian Giske
Scientific Secretary: John Turnidge
Clinical data coordinator: Rafael Canton
Technical data coordinator: Gunnar Kahlmeter

Webmaster: Gunnar Kahlmeter