the overall killing effect of ciprofloxacin with streptomycin was antagonistic , whereas synergism ( greater than or equal to one log10 decrease in viable counts ) was observed in streptomycin-susceptible strains with combinations of streptomycin and ampicillin , imipenem , piperacillin or vancomycin .
C0002680
ampicillin
C0031955
piperacillin