<prompt> Extended spectrum beta lactamases ESBLs are characterized by activity against all except:PenicillinasesCephalosporinasesOxyimino-cephalosporinasesCarbapenems  <response>: CARBAPENEMS: lmipenem :It is an extremely potent and broad-spectrum Beta-lactam antibiotic whose range of activity includes grampositive cocci, Enterobacteriaceae, Ps. aeruginosa, Listeri. 