changes in susceptibility to four aminoglycosides ( gentamycin , amikacin , tobramycin , sisomicin ) of bacterial strains , isolated from in-patients with urinary tract infections at the `` '' santa maria della scala '' '' hospital of siena , in the period january-april in three consecutive years ( 1980 , 1981 , 1982 ) were studied .
C0017436
gentamycin
C0037209
sisomicin