Our website will be undergoing planned maintenance starting at 5:00 PM EST on Dec. 11 and will be back in the morning of Dec. 12. During this time some features will be unavailable, like login and signup.
Our website will be undergoing planned maintenance starting at 5:00 PM EST on Dec. 11 and will be back in the morning of Dec. 12. During this time some features will be unavailable, like login and signup.

CLSI Press Releases

CLSI is your source for laboratory standards news and information.

Find important updates, industry news, and information on CLSI’s upcoming events. Check out past CLSI press releases, upcoming Committees Week, and newsworthy items.

New & Updated Phlebotomy Documents

April 28, 2017

The Clinical and Laboratory Standards Institute has published two phlebotomy documents: Collection of Diagnostic Venous Blood Specimens (GP41-Ed7) and Essential Elements of a Phlebotomy Training Program (GP48-Ed1).

Read More

New MALDI-TOF MS Microbiology Document

April 28, 2017

The Clinical and Laboratory Standards Institute has published the microbiology guideline Methods for the Identification of Cultured Microorganisms Using Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (M58-Ed1).

Read More

CLSI Announces 2017 Excellence Awards Recipients

February 17, 2017

Wayne, Pennsylvania, USA—January 2017—CLSI Excellence Awards are bestowed upon volunteers who are committed to CLSI’s mission. Recipients are recognized for dedicating significant time and effort to the development, implementation, and promotion of voluntary consensus standards. The recipients are nominated by their peers and selected by the CLSI Awards Committee. CLSI celebrates the achievements of volunteers, as they are fundamental to the development of best practices in clinical and laboratory testing.

Read More

M100-S27 Revised AST Breakpoints Document

January 1, 2017

To improve detection and reporting of antimicrobial resistance, the Clinical and Laboratory Standards Institute (CLSI) has published a revised edition of its annual supplement providing revised breakpoints, new testing recommendations, and reporting changes needed to incorporate into routine practice. The document, titled Performance Standards for Antimicrobial Susceptibility Testing (M100, 27th ed.), provides updated tables for the CLSI antimicrobial susceptibility testing (AST) standards Performance Standards for Antimicrobial Disk Susceptibility Tests (M02-Ed12), Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria That Grow Aerobically (M07-Ed10), and Methods for Antimicrobial Susceptibility Testing of Anaerobic Bacteria (M11-Ed8).

Read More

Revised Veterinary AST Document

January 1, 2017

A variety of laboratory techniques can be used to measure the in vitro susceptibility of bacteria to antimicrobial agents. This document, titled Methods for Antimicrobial Susceptibility Testing of Infrequently Isolated or Fastidious Bacteria Isolated From Animals (VET06-Ed1), describes the standard disk diffusion method, as well as standard broth dilution (macrodilution and microdilution) and agar dilution techniques for infrequently isolated or fastidious bacteria from animals. It includes procedures designed to standardize test performance as well as recommendations for QC and growth conditions for the organisms.

Read More

Revised Human IgE Assay Report

October 7, 2016

To define the current state of reagents and serological assay technology used to measure total human immunoglobulin E (IgE) and IgE antibodies of defined allergen specificities in human blood, the Clinical and Laboratory Standards Institute (CLSI) has published a revised report that focuses on IgE assay design and calibration, validation methods, QA of assay reagents, QC strategies, and clinical applications.

Read More

CLSI Released an Updated Standard on Evaluation of Precision of Quantitative Measurement Procedures

September 26, 2014

The Clinical and Laboratory Standards Institute (CLSI) has published an updated standard—Evaluation of Precision of Quantitative Measurement Procedures; Approved Guideline—Third Edition (EP05-A3). This document provides guidance for studies intended to establish the within-site precision performance characteristics of quantitative measurement procedures used in clinical laboratories, and also for studies addressing site-to-site variability.

Read More