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Microorganism MIC50
(μg/ml)		 MIC90
(μg/ml)		 Range
(μg/ml)		 Antimicrobial Reference
Haemophilus influenzae (β-lactamase negative) 1 2 0.5 － 4 Azithromycin (Zithromax, Sumamed, Zitrocin) 462