clinical isolates of klebsiella pneumoniae and serratia marcescens at a hospital that had used amikacin as its principal aminoglycoside for the preceding 42 months demonstrated high-level resistance to amikacin ( greater than or equal to 256 micrograms/ml ) , kanamycin ( greater than or equal to 256 micrograms/ml ) , gentamicin ( greater than or equal to 64 micrograms/ml ) , netilmicin ( 64 micrograms/ml ) , and tobramycin ( greater than or equal to 16 micrograms/ml ) .
C0002556
aminoglycoside
C0040341
tobramycin