15.03.2024

EUCAST panels of strains with well defined susceptibility

EUCAST has organised panels of organisms with phenotypically well characterized levels of susceptibility. These are available through the Gothenburg University Strain Collection services (CCUG).

MIC-values were determined with reference broth micro-dilution on several occasions before and after freeze drying. Each panel will contain 5 - 25 strains of which a few strains have MICs representative of the wild type of the species, and others with typical resistance mechanisms and phenotypically reproducible levels of susceptibility. Each panel will highlight a difficult area of susceptibility testing. They will be useful for

• laboratories aiming to validate the accuracy of their AST methods
• validating the quality of commercial material intended for susceptibility testing (the MIC-value or the correct categorisation of S, I and R)
• developers of antimicrobials and AST methods.

Currently, panels of Streptococcus pneumoniae and of Pseudomonas aeruginosa are available.

Panels of Enterobacterales and Pseudomonas suitable for calibrating disk diffusion of cefiderocol are being organised.