EUCAST SOPs

SOP 1.5   
Setting breakpoints for new antimicrobial agents (9 May, 2025)

Previous versions 1.4; 1.3; 1.2; 1.1

SOP 2.5 
Harmonising breakpoints for existing antimicrobial agents (12 May, 2025)

Previous versions: 2.4; 2.3; 2.2; 2.1

SOP 3.4 
Review and revision of breakpoints (6 May, 2025)

Previous versions: 3.3; 3.2; 3.1

SOP 4.7 
EUCAST Committees and subcommittees (12 May, 2025) 

Previous versions: 4.6; 4.5; 4.4; 4.3; 4.2; 4.1; 4.0

SOP 5.4 
EUCAST and the interaction with NACs (7 May, 2025) 

Previous versions: 5.3; 5.2; 5.1; 5.0

SOP 6.4 
Organisation and maintenance of EUCAST websites (6 May, 2025)

Previous versions: 6.3; 6.2; 6.1; 6.0

SOP 7.4 
Preparation and handling of EUCAST minutes (6 May, 2025)

Previous versions: 7.3; 7.2; 7.1; 7.0  

SOP 8.4 
Format and updates of documents (6 May, 2025)

Previous versions: 8.3; 8.2; 8.1; 8.0 

SOP 9.4 
Procedure for establishing zone diameter breakpoints and quality control criteria for new antimicrobial agents (10 July, 2025)

Previous versions: 9.3; 9.2; 9.1; 9.0

SOP 10.2 
MIC distributions and the setting of epidemiological cut-off (ECOFF) (10.2 from 2021, re-affirmed 12 May 2025)

Previous versions: 10.1; 10.0

SOP 11.1 
Procedure for optimizing disk contents (potencies) for disk diffusion testing of antimicrobial agents using harmonized CLSI and EUCAST criteria (21 January, 2025)

Previous versions: 11.0

SOP 12.1 
Process for submitting disk content (potency) data for joint CLSI and EUCAST working group review and approval (11 March 2025)

Previous versions: 12.0

SOP 13.0 
Procedure for confirming the acceptability of Mueller-Hinton agar sources for subsequent use in CLSI and/or EUCAST studies to establish disk diffusion quality control ranges (21 September, 2023, re-affirmed 13 April, 2025)

Template for registering trial data 
(22 August, 2023)