Phenotypic confirmatory test for ESBL using #Klebsiella pneumoniae. What to notice:Small inhibition zones around CAZ (30) and CTX (30) aloneMarked increase in zone size when combined with clavulanic acid (CAZ/Clav & CTX/Clav) Interpretation: A ≥5 mm increase in zone diameter with clavulanate = #ESBL producer When clavulanic acid restores activity, it exposes the hidden resistance mechanism.#Elmicrobiologist

Reference:https://www.threads.com/@elmicrobiologist/post/DU5S2Slje0k?xmt=AQF0tE_zDDKLvsQVMzwChKB1iMqhMtKtcpzd7dbw1HpiyFRD4pN1JKWDOU0Idp7b4gFtanU5&source_surface=35&slof=1