three active macrolides against 100 % of strains were : erythromycin ( mic 50 = 0.25 mg/l - mic 90 = 0.50 mg/l ) , roxithromycin ( mic 50 = 0.50 mg/l - mic 90 = 0.50 mg/l ) and josamycin ( mic 50 = 0.50 mg/l - mic 90 = 1 mg/l ) ;
C0014806
erythromycin
C0035891
roxithromycin