Quality Control for Antimicrobial Susceptibility Testing

Comprehensive Quality Control in understanding antimicrobial resistance

Performing comprehensive Quality Control (QC) testing is key in ensuring your laboratory’s antimicrobial susceptibility testing (AST) solutions are providing accurate and reliable results.

AST QC guidelines by CLSI and EUCAST are continuing to evolve as more and more antimicrobial resistant QC strains are added into routine QC recommendations. By testing antimicrobial resistant QC strains you can be confident that your laboratory results are reliable and give a clear picture of pathogen resistance patterns.

Want to find out more about the QC for AST portfolio?

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Ensuring detection of novel antimicrobial resistant strains – look out for Carbapenemases

Ensuring detection of novel antimicrobial resistant strains – look out for Carbapenemases

Carbapenemase-producing strains continue to strive and develop various mechanisms of antimicrobial resistance. Incorporating resistant strains into routine Quality Control testing processes ensures antimicrobial susceptibility testing solutions can recognize different resistance patterns.

Learn more about Carbapenem resistant strains:

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The Thermo Scientific™ Culti-Loops™ portfolio has been extended to serve QC testing needs following CLSI and EUCAST guidelines.

New organisms added into the Culti-Loops portfolio:

Order codeStrain descriptionIntended useCLSIEUCAST


Culti-Loops Aspergillus flavus ATCC™ 204304™

Fungal QC strain for MIC testing.


Culti-Loops Aspergillus fumigatus ATCC™ 204305™

Fungal QC strain for MIC testing.



Culti-Loops Enterococcus faecalis ATCC™ 33186™

Suitability of Mueller-Hinton media testing.



Culti-Loops Escherichia coli NCTC 13353™

CTX-M-15 (ESBL); Cephalosporin resistant



Culti-Loops Escherichia coli NCTC 13846™

MCR-1; Colistin resistant



Culti-Loops Klebsiella pneumoniae ATCC™ BAA-2814™

KPC-3, SHV-11, TEM-1; carbapenemase & β-lactamase producer


Culti-Loops Staphylococcus aureus NCTC 12493™

mecA positive (MRSA)


For more information about the full range of QC products available, visit the Microbiology Quality Control page.

Quality Control for AST brochure

Free download: Quality Control for Antimicrobial Susceptibility Testing brochure

Ensure quick and easy preparation of Quality Control cultures with Thermo Scientific Culti-Loops ATCC® and NCTC strains. Culti-Loops offer a full portfolio of QC strains for antimicrobial susceptibility testing following CLSI and EUCAST recommendations.  

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Download Stock Culture Maintenance Protocol

Bring efficiency through best practice to microbiology quality control testing

Safeguarding the purity and identity of quality control organisms through proper maintenance is critical to achieving accurate control results for culture media and reagents. Our guide highlights industry guidelines and best practices to ensure compliance to standards, as well as approaches to reduce the time spent maintaining frozen stock cultures.

Download Stock Culture Maintenance Protocol

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*The ATCC Licensed Derivative® Emblem, the ATCC Licensed Derivative® word mark and the ATCC catalog marks are trademarks of ATCC. Remel Inc. is licensed to use these trademarks and to sell products derived from ATCC® cultures. The identity, purity, and authenticity of the Licensed Products are exclusively the responsibility of Remel Inc., and not ATCC.