Become a CLSI member to access standards implementation tools and resources.
Resources
At CLSI, we are dedicated to providing laboratories with the essential tools and resources to maintain the highest standards of quality and accuracy.
Discover a wealth of essential tools and resources, from analytic tools to implementation kits and protocols to enhance laboratory testing accuracy and efficiency.
Technical Tools
Elevate Your Lab’s Performance
CLSI QMSGAP
Gap Analysis Tool
Subscription
$99.00
CLSI MNav
Method Navigator
Subscription
Method Evaluation
Free
CLSI ILA37Database
ILA37Database
Subscription
$80.00
CLSI EP37
Supplemental Tables for Interference Testing in Clinical Chemistry
Subscription
Method Evaluation
$80.00
AST Tools & Resources
Ensure Readiness with these Important Resources
CLSI is committed to providing access to tools, news, and updates related to antimicrobial resistance (AMR) and antimicrobial susceptibility testing (AST).
This toolkit is designed to support laboratories through the performance of a verification or validation study to update breakpoints.
CLSI’s MicroFree™ platform enables users to freely access important information on Antimicrobial Susceptibility Testing, a critical need for laboratories and providers dealing with drug-resistant pathogens and infections.
Rationale documents describe the scientific reasons behind CLSI standards and guidance including the standardized data and methods used to determine breakpoints and interpretive categories.
ASM, in collaboration with CLSI and CAP, has developed IQCP templates for Quality Control of commercial cartridge-based molecular test systems, clinical microbiology tests, and AST.
ECOFF Finder is designed to estimate epidemiological cutoff values (ECVs, ECOFFs) for the minimal inhibitory concentrations or minimal effective concentrations of wild-type bacterial or fungal populations.
RangeFinder MIC and RangeFinder Disk are Microsoft Excel spreadsheet calculators that assist with estimating quality control ranges for studies that follow the CLSI M23 standard.
AST News and Events
This AST newsletter, authored by the CLSI AST Working Group on Outreach, provides information about current AST practices, recommendations, and resources for the clinical microbiology community.
This overview of the AST Subcommittees and meeting protocols is designed for the participant attending AST working meetings for the first time.
Find and download meeting minutes and materials from CLSI AST Subcommittees sessions.
Archived Information
A reference of breakpoints eliminated from CLSI document CLSI M100 Since 2010.
Description of methods no longer considered reliable for testing, including Modified Hodge Test and tests for detecting methicillin (oxacillin) resistance.
QC Ranges eliminated from CLSI document CLSI M100 Since 2010.
Epidemiological Cutoff Values (ECVs) eliminated from CLSI document CLSI M100 Since 2010.
Webinars and Education Programs
CLSI offers a range of webinars, self-directed eLearning courses and educational programs to promote the interpretation and implementation of standards and quality management practices.
Harmonized Terminology Database
The Harmonized Terminology Database (HTD) is a compilation of internationally accepted terminology to assist members of the laboratory sciences and related health care industries and promote the use of standardized language and terminology.
Standards Development Policies and Processes
This document contains the approved policies and processes for developing CLSI consensus standards and guidelines, supplements, and derivative products.
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Case Study
Hear from Our Members and Partners
Our case studies offer practical examples of how labs, health systems, clinics, and countries have successfully implemented guidelines, overcome challenges, and achieved improvements in testing accuracy and efficiency.
Featured Case Study
Geisinger Expands Access with CLSI Membership
Geisinger utilized CLSI’s Health System Membership to streamline access to vital laboratory standards across their entire health network. This approach has helped enhance operational efficiency and improve patient outcomes by ensuring all labs adhere to the same high-quality standards.
Latest Insights
Article
CLSI experts will be attending ADLM 2025 in Chicago, Illinois 27-31 July. Here's your guide to key talks you won't want to miss!
Antimicrobial Susceptibility Testing
CLSI recently hosted it's June 2025 Committees Week in Frisco, Texas. Here are key highlights from the meetings.
Article
If you missed us on April 29, Testing With Confidence: Evaluation Protocols and Strategies for Compliance, don’t worry. Here’s a recap of key panel discussions and how you can still get involved.