the in vitro activity of norfloxacin ( mk-0366 ) , a new oral antimicrobial agent , was compared to that of ampicillin , tetracycline , cefazolin , nitrofurantoin , nalidixic acid , and trimethoprim against 199 gram-negative urinary isolates .
C0028365
norfloxacin
C1136254
antimicrobial agent