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Microorganism MIC50
(μg/ml)		 MIC90
(μg/ml)		 Range
(μg/ml)		 Antimicrobial Reference
Streptococcus pyogenes 0.25 - ? － ? Cephalexin (Keflex, Keftal, Cefanox) 308
Streptococcus pyogenes - - 0.2 － 12.5 Cephalexin (Keflex, Keftal, Cefanox) 1410