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Microorganism MIC50
(μg/ml)		 MIC90
(μg/ml)		 Range
(μg/ml)		 Antimicrobial Reference
Streptococcus pneumonia (erythromycin-susceptible) 0.06 0.125 0.03 － 0.125 Azithromycin (Zithromax, Sumamed, Zitrocin) 1113
Streptococcus pneumonia (erythromycin-susceptible) 0.06 0.25 0.008 － 0.25 Azithromycin (Zithromax, Sumamed, Zitrocin) 1113
Streptococcus pneumonia (erythromycin-susceptible) 0.12 0.25 0.03 － 64 Azithromycin (Zithromax, Sumamed, Zitrocin) 948
Streptococcus pneumonia (erythromycin-susceptible) 0.125 0.125 ≤0.031 － 0.125 Azithromycin (Zithromax, Sumamed, Zitrocin) 502