Table 3. Categorical agreement of MBT-ASTRA (Bruker Daltonik GmbH) for AMX and CTX susceptibility testing of E. coli-positive blood cultures.

	Sterile blood cultures inoculated with E. coli		E. coli isolates retrieved from blood cultures
	AMX test	CTX test	AMX test	CTX test
Full agreement	93%	93%	95%	84%
Minor error	Non applicable	Non applicable	Non applicable	Non applicable
Major error	7%	7%	5%	16%
Very major error	0%	6%	2%	29%