in addition , there were no notable increases in the concentrations of meropenem required for inhibition of the isolates least susceptible to imipenem ( mic greater than or equal to 4 mg/l ) , suggesting that differences in penetration and/or target-binding properties exist not only between the carbapenems and other beta-lactams , but also between meropenem and imipenem .
C0006968
carbapenems
C0282215
beta-lactams