WARNING: We do not support Internet Explorer. It is not secure and will not work correctly. Please come back using a newer web browser.


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.

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.

Using M100-Ed32

Using M100

Improve your lab's antimicrobial susceptibility testing (AST) by using this self-paced, online learning program. This interactive program will teach you how to navigate the many tables found in CLSI's document M100—Performance Standards for Antimicrobial Susceptibility Testing, 32nd Edition.

Volunteering With CLSI

Hear directly from our volunteers about their experience volunteering on CLSI AST Subcommittees.

Meetings

Future Meetings

January 19–24, 2023
Orlando, Florida

June 3-6, 2023
St. Louis, Missouri

Recent Meetings

June 23-28, 2022
Rosemont (Chicago), Illinois

January-February 2022
Virtual

June 2021
Virtual

Staff Liaisons

AST Staff Liaison | Emily Gomez, MS, MLS(ASCP)MB

Antifungal Staff Liaison | Christine​​ Lam, MT(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

Using M100-Ed32

Using M100: Performance Standards for Antimicrobial Susceptibility Testing

Improve your lab's antimicrobial susceptibility testing (AST) by using this self-paced, online learning program. This interactive program will teach you how to navigate the many tables found in CLSI's document M100—Performance Standards for Antimicrobial Susceptibility Testing, 32nd Edition.