CLSI Susceptibility Testing Subcommittees and Resources
Advancing the Field of Microbiology with Timely AST Standards
Find the latest news and updates from our microbiology standards committees.
About the Susceptibility Testing Subcommittees
Subcommittees are responsible for two or more related documents in a topic area. They write draft documents, evaluate and respond to comments on content throughout the document development process, conduct scheduled document reviews, and may be responsible for continual revision of certain documents.
CLSI has established subcommittees in the following areas:
Antimicrobial Susceptibility Testing (AST) Subcommittee
The AST Subcommittee provides useful information to laboratories, enabling them to advise clinicians in the selection of appropriate antimicrobial therapy.
Antifungal Susceptibility Testing Subcommittee
The Antifungal Subcommittee collaborates to develop standards and guidelines that promote accurate antifungal susceptibility testing and appropriate reporting.
Veterinary Antimicrobial Susceptibility Testing (VAST)
The VAST Subcommittee collaborates to develop standards and guidelines that promote accurate antimicrobial susceptibility testing and appropriate reporting.
Susceptibility Testing Resources
View Meeting Files and Resources
Meeting Presentation Minutes
- AST Meeting Minutes
- Antifungal Meeting Minutes
- VAST Meeting Minutes
- New Attendee Orientation Presentation
- New Attendee Orientation On-Demand Recording
M100 Resources
Other Tools Used for Decisions
View Educational Resources
AST News Updates
Webinars
- Upcoming Microbiology Webinars
- Archived Microbiology Webinars
- On-Demand CLSI-SIDP ACCP Annual Webinar
Note: This will open ProCE's website.
Other
- Statistician Summary for Alternative 5X3 QC Testing
- CLSI and AST
- FDA Makes Up-to-Date Susceptibility Test Interpretive Criteria (Breakpoint) Resources Available Online
Note: This will open the FDA website. - M23 Disk Content Submission Inquiry
- Joint ASM-CLSI-CAP Individualized Quality Control Plan (IQCP)
Note: This will open the ASM website.
Access Our Free Microbiology Standards Resources
M100 and M60 Free
Performance Standards for Antimicrobial & Antifungal Susceptibility Testing
Access read-only web versions of M100 and M60 to quickly reference the most trusted AST and antifungal breakpoints. Available online as a convenient companion to our M100 document and M60 document.
AST Rationale Documents (Free)
AST Rationale Documents (Free)
Providing the scientific reasons behind breakpoint decisions.
M23
Development of In Vitro Susceptibility Testing Criteria and Quality Control Parameters, 5th Edition
This guideline discusses the necessary and recommended data for selecting appropriate breakpoints and quality control ranges for antimicrobial agents.
VET01S Free
Performance Standards for Antimicrobial Disk and Dilution Susceptibility Tests for Bacteria Isolated From Animals, 5th Edition
This document includes updated tables for the Clinical and Laboratory Standards Institute veterinary antimicrobial susceptibility testing standard VET01.
Volunteering With CLSI
Hear directly from our volunteers about their experience volunteering on CLSI AST Subcommittees.
Meetings
Future Meetings
May 24–June 17, 2021
Virtual
January 2022
Ft. Lauderdale, Florida
(Virtual Options Available)
Recent Meetings
January-February 2021
Virtual
August-October 2020
Virtual
Staff Liaisons
AST and Antifungal Staff Liaison | Marcy L. Hackenbrack, MCM, M(ASCP)
VAST Staff Liaison | Lori T. Moon, MS, MT(ASCP)
Shop the Latest
On-Demand CLSI and CAP 2021 Webinar
Ensuring Quality Beyond the Test: Reporting Antimicrobial Susceptibility Results
Thursday, January 21, 2021 | 1:00–2:00 PM Eastern (US) Time
M59
Epidemiological Cutoff Values for Antifungal Susceptibility Testing, 3rd Edition
This document provides epidemiological cutoff values developed according to the criteria in the Clinical and Laboratory Standards Institute (CLSI) guideline M57 and generated according to the reference broth dilution methods described in the CLSI standards M27 and M38.
M60
Performance Standards for Antifungal Susceptibility Testing of Yeasts, 2nd Edition
This document provides updated minimal inhibitory concentration, zone diameter, and quality control tables for the Clinical and Laboratory Standards Institute antifungal susceptibility testing documents M27 and M44.
M61
Performance Standards for Antifungal Susceptibility Testing of Filamentous Fungi, 2nd Edition
This document provides minimal inhibitory concentration breakpoints and quality control tables for the Clinical and Laboratory Standards Institute antifungal susceptibility testing documents M38 and M51.