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CLSI Blog Articles

Read the latest articles about CLSI and laboratory standards in the official CLSI Blog. Browse our most recent blog articles below.


World Antimicrobial Awareness Week 2022

World Antimicrobial Awareness Week (WAAW) is an annual global campaign to improve awareness and understanding of antimicrobial resistance (AMR) and encourage best practices among the public, One Health stakeholders, and policymakers, who all play an important role in reducing the further emergence and spread of AMR. WAAW will be celebrated November 18-24.

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Celebrate World Standards Day With CLSI

Standards make the world a safer place. They touch almost every part of our daily lives by ensuring that products and services work the way that we expect them to, making life safer and more enjoyable. Standards are essential to creating a fairer, more sustainable world and achieving the United Nation’s 2030 Agenda for Sustainable Development.

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AST News Update June 2022: Updating Breakpoints–New Developments from CAP

The College of American Pathologists (CAP) is introducing two new requirements for clinical laboratories to use updated breakpoints (BPs) when interpreting antimicrobial susceptibility testing (AST) results. CAP has recognized that some laboratories are using obsolete breakpoints, even when devices have achieved US Food and Drug Administration (FDA) clearance for updates, which could lead to adverse consequences in managing patients.

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AST News Update June 2022: Hot Topic

Candida auris is an emerging yeast that is causing numerous outbreaks in health care settings, and life-threatening infections in patients worldwide.1 Most isolates of C. auris are multidrug resistant.

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Monkeypox Testing Guidance and Resources

The US Centers for Disease Control and Prevention (CDC) is tracking multiple cases of monkeypox that have been reported in several countries that don’t normally report monkeypox, including the United States. They are urging healthcare providers in the US to be alert for patients who have rash illnesses consistent with monkeypox and are working with state and local health officials to identify people who may have been in contact with individuals who have tested positive for monkeypox, so they can monitor their health. According to CDC, Monkeypox is rare and does not spread easily between people without close contact. The threat of monkeypox to the general US population remains low.

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Glen Fine, Chief Executive Officer, CLSI

CEO Glen Fine's Farewell Message

As I depart CLSI and enter the new phase of retired life, I would like to take a moment to reflect and give my thanks to all who have made my 17 years as your CEO the most rewarding and deepest honor of my life.

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Implementation of the CLSI Method for Direct Disk Diffusion Testing From Positive Blood Cultures

The CLSI AST Subcommittee has developed and published breakpoints for direct blood culture disk diffusion (DD) testing of several antimicrobial agents for Enterobacterales and Pseudomonas aeruginosa. This project was undertaken to provide antimicrobial susceptibility testing (AST) results earlier than traditional AST methods. Rapidity of susceptibility testing and reporting is particularly important for bloodstream infections. Studies have shown that mortality from sepsis increases every hour that the time to first appropriate antimicrobial is delayed. CLSI developed this method to provide laboratories with a direct-from-blood culture testing approach which is both simple to perform and inexpensive.

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