Extended spectrum beta lactamases (ESBLs) are characterized by activity against all except.
Ans. (D) Carbapenems(Ref: Katzung 10/e p739)Carbapenems like imipenem are the only beta lactams reliably efficacious against ESBL producing bacteria.
Penicillinases
Cephalosporinases
Oxyimino-cephalosporinases
Carbapenems
Chemotherapy: General Principles