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Microorganism MIC50
(μg/ml)		 MIC90
(μg/ml)		 Range
(μg/ml)		 Antimicrobial Reference
Streptococci (Viridans group + penicillin-resistant) 0.5 2 0.5 － 64 Erythromycin (E-mycin, Ery-tab, Benzamycin) 1396
Streptococci (Viridans group + penicillin-resistant) 1 4 0.008 － >128 Erythromycin (E-mycin, Ery-tab, Benzamycin) 19
Streptococci (Viridans group + penicillin-resistant) 1 - ? － ? Erythromycin (E-mycin, Ery-tab, Benzamycin) 39
Streptococci (Viridans group + penicillin-resistant) >4 >4 ≤0.25 － >4 Erythromycin (E-mycin, Ery-tab, Benzamycin) 43