Below you find links to various resources as regards antimicrobial susceptibility testing (AST).

WHO GFN External Quality Assurance System (EQAS)

Participation in internal and external quality assurance systems is a useful tool for production of reliable laboratory results of consistently good quality. However, a WHO survey of antimicrobial resistance surveillance capabilities in 1995 determined that more than 50% of laboratories performing susceptibility testing of Salmonella isolates did not participate in any formal system of quality assurance.
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ResFinder database

A database that collects and allows to search and explore sequences of a large number of antimicrobial resistance genes click here.

WHONET software

WHONET is a free Windows-based database software developed for the management and analysis of microbiology laboratory data with a special focus on the analysis of antimicrobial susceptibility test results. The software has been developed since 1989 by the WHO Collaborating Centre for Surveillance of Antimicrobial Resistance based at the Brigham and Women's Hospital in Boston, and is used by clinical, public health, veterinary, and food laboratories in over 90 countries to support local and national surveillance programs.
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Resources available from the EURL-AR website (link
- Recommended cut off values for monitoring of AST
- MIC-determination (microbroth)
- Microbroth panels used by the EURL-AR
- Confirmation of ESBL-production (E-test)
- Methods for confirmatory testing for ESBLs
- Procedure for lysis of blood
- Calculating cations for cation-adjusted Mueller Hinton broth
- List of reference strains (EURL-AR)
- List of primers for detection of antimicrobial resistance genes (EURL-AR) 
EURL-AR refers to EU Reference Laboratory on Antimicrobial Resistance
WHO GFN refers to WHO Global Foodborne Infections Network