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Microorganism
MIC50
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MIC90
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Range
(μg/ml)		 sort
Antimicrobial sort
Reference
Streptococcus pyogenes (macrolide-susceptible) 0.03 0.03 <0.015 － 0.03 Cethromycin (ABT-773) 15
Streptococcus pyogenes (macrolide-susceptible) 0.03 0.03 0.03 － ? Clarithromycin (Biaxin) 15
Streptococcus pyogenes (macrolide-susceptible) 0.03 0.06 0.03 － 0.06 Clindamycin (Cleocin) 15
Streptococcus pyogenes (macrolide-susceptible) 0.03 0.06 0.03 － 0.06 Erythromycin (E-mycin, Ery-tab, Benzamycin) 15
Streptococcus pyogenes (macrolide-susceptible) 0.12 0.25 0.12 － 0.25 Azithromycin (Zithromax, Sumamed, Zitrocin) 15