TABLE 3.

Results for isolates not identified by AES as ESBL producers, for which PCR amplified an ESBL gene^a

Bacteriumb	Reference antibioticsc	Interpretation of VITEK AES	ESBL or ESBL type whose gene was amplified
E. cloacae*	CTX, CAZ, FEP	High-level cephalosporinase	SHV-12
E. aerogenes	CTX, CAZ, FEP	High-level cephalosporinase + carbapenem resistance	CTX-M-10 group
E. aerogenes*	CTX, FEP	Acquired penicillinase	CTX-M-25 group
E. cloacae*	CAZ	High-level cephalosporinase	SHV-12
E. cloacae*	CTX, CAZ	High-level cephalosporinase	SHV-12
E. cloacae	CTX	High-level cephalosporinase + impermeability	CTX-M-2 group

^aA total of six isolates (two from blood and four from other sites) were tested. The results given are for individual isolates.

^b*, reported by AES as susceptible to at least one cephalosporin.

^cCTX, cefotaxime; CAZ, ceftazidime; FEP, cefepime.