the effect of combinations of gentamicin with trimethoprim or sulfamethoxazole-trimethoprim against clinical isolates of escherichia coli ( 11 strains ) and klebsiella pneumoniae ( 12 strains ) was examined by using a microdilution checkerboard technique .
C0041041
trimethoprim
C0041044
sulfamethoxazole-trimethoprim