the authors have studied the antimicrobial susceptibility of 1073 clinical isolates of various genera of enterobacteriaceae ( collected during the period july-december 1988 ) to ampicillin , piperacillin , cefotaxime , ceftazidime , ceftriaxone , aztreonam , imipenem , gentamicin , amikacin , netilmicin , norfloxacin , and ciprofloxacin .
C0002680
ampicillin
C0031955
piperacillin