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Microorganism MIC50
(μg/ml)		 MIC90
(μg/ml)		 Range
(μg/ml)		 Antimicrobial Reference
Streptococci (Viridans group) 0.25 0.5 <0.12 － 0.5 Quinupristin/Dalfopristin (Synercid) 1060
Streptococci (Viridans group) 0.5 1 ≤0.06 － 4 Quinupristin/Dalfopristin (Synercid) 265
Streptococci (Viridans group) - 0.75 ? － ? Quinupristin/Dalfopristin (Synercid) 1112