Extended spectrum beta lactamases (ESBLs) are characterized by activity against all except:
CARBAPENEMS: lmipenem :It is an extremely potent and broad-spectrum Beta-lactam antibiotic whose range of activity includes grampositive cocci, Enterobacteriaceae, Ps. aeruginosa, Listeri.
Penicillinases
Cephalosporinases
Oxyimino-cephalosporinases
Carbapenems
Chemotherapy