the antibacterial spectrum of activity of piperacillin was compared with that of other antibiotics against isolates of escherichia coli , enterobacter cloacae , haemophilus influenzae , klebsiella pneumoniae , pseudomonas aeruginosa , pseudomonas cepacia , pseudomonas maltophilia , serratia marcescens , enterococcus sp , bacteroides fragilis , bacteroides bivius , and clostridium difficile obtained from laboratories at hospitals in st .
C0279516
antibacterial
C0031955
piperacillin