also , synergistic effects of sulfamethoxazole-trimethoprim , sulfamethoxazole-erythromycin , and sulfamethoxazole-cefaclor were seen when combinations were tested against both beta-lactamase-positive and -negative strains , as determined by minimal inhibitory concentrations measured by the broth dilution method and by killing curve analyses .
C0041044
sulfamethoxazole-trimethoprim
C0038689
sulfamethoxazole