with respect to the selection of beta-lactam-resistant variants marked discrepancies between the recently developed cephalosporin hr 810 and other recently developed cephalosporins could be observed : beta-lactam resistant subpopulations did not emerge during a 16-hour culture in the presence of the 20-fold minimal inhibitory concentration in a clinical enterobacter cloacae isolate ( 2240/81 ) in contrast to cefoperazone , cefotaxime , ceftriaxone and ceftazidime .
C3536856
cephalosporins
C0007561
ceftriaxone