EUCAST warnings concerning antimicrobial susceptibility testing products or procedures

The EUCAST Development Laboratories, from time to time discover products (disks, media batches, gradient tests, devices and/or procedures) which are not performing to the expected standard. When this is the case we inform the manufacturer and publish a warning on this page. We do not systematically test all products so the lack of a warning does not imply that there is no problem with the product in question. Laboratories which experience problems with a susceptibility test method, and suspect that this may be related to a particular product, may contact EUCAST for advice using the Contact form below. 

Warnings

(21 November, 2019; data and data analysis added 27 November; updated 4 May 2022, 18 August 2025)

Read more

For this reason, it is difficult to resolve the susceptibility interpretation of isolates in the ATU (area of technical uncertainty) in routine testing.

Read more

This warning, specifically targeting the failure of colistin gradient tests to provide the correct MIC, was initially issued July 2016 and updated 26 June, 2017 and is extended and still valid…

Read more

The following warning is removed since the problem has been solved (2024-06-05)

Read more

EUCAST disk diffusion of anaerobe bacteria (Bacteroides spp., Prevotella spp., Fusobacterium necrophorum, Clostridium perfringens and Cutibacterium acnes) is performed on Fastidious Anaerobe Agar.

Read more

- the manufacturer has issued a warning against all current batches of MH broth when used together with any freeze dried Sensititre BMD panel.

Read more

In many cases manufacturers of susceptibility testing material and devices list species for which the product is validated for use.

Read more

| Bacteria

EUCAST has now evaluated commercially available pre-poured MH plates.

Read more

Warnings against Etest and MTS were removed November 2019 and April 2020, respectively.

Read more

| Bacteria

29 February, 2020

Read more
previous 1 2 next

Contact

Looking for more information? Get in touch with an EUCAST representative today!

Contact form