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Microorganism MIC50
(μg/ml)		 MIC90
(μg/ml)		 Range
(μg/ml)		 Antimicrobial Reference
Streptococcus pyogenes (erm(B)) >=64 ≥64 0.25 － >=64 Clarithromycin (Biaxin) 950
Streptococcus pyogenes (erm(B)) >64 >64 4 － >64 Clarithromycin (Biaxin) 1113
Streptococcus pyogenes (erm(B)) - - >32 － ? Clarithromycin (Biaxin) 52