cefotaxime ( hr756 ) , a new semisynthetic cephalosporin , and ly127935 were more active , and showed lower minimum inhibitory concentrations ( ranges , less than or equal to 0.12 to 2.0 micrograms/ml ) , than cefamandole , cefoxitin , and cefazolin against escherichia coli , klebsiella spp. , enterobacter spp. , proteus mirabilis , indole-positive proteus spp. , serratia marcescens , providencia spp. , and citrobacter spp .
C3536856
cephalosporin
C0007557
cefoxitin