is the ability to produce b lactamase present
Beta-lactamases (Î²-lactamases) are enzymes (EC 3.5.2.6) produced by bacteria (also known as penicillinase) that provide multi-resistance to Î²-lactam antibiotics such as penicillins, cephamycins, and carbapenems (ertapenem), although carbapenems are relatively resistant to beta-lactamase.