9 Confirming resistance mechanisms in practice

Once screening has enabled the identification of isolates which may have the resistance mechanism you are investigating, various methods can be used to confirm whether that mechanism is present or not (EUCAST, 2017).

The following sections illustrate how confirmatory tests work in practice for ESBLs, carbapenemases and in Gram-positive organisms.

8.2 Screening for resistance mechanism in practice

9.1.1 Screening