. 2018 Sep 24;18:121. doi: 10.1186/s12866-018-1261-1

Table 3.

MIC₅₀ and MIC₉₀ values of penicillin, streptomycin, vancomycin, amikacin, gentamicin, and tetracycline for Gram-positive bacilli and cocci

Isolates	μg/mL	PEN	EST	VAN	AMI	GEN	TET
Gram-positive bacilli (n = 118)	MIC₅₀	1	2	2	0.5	0.5	0.5
Gram-positive bacilli (n = 118)	MIC₉₀	> 32	32	8	1	2	8
Gram-positive cocci (n = 103)	MIC₅₀	8	4	2	2	0.5	1
Gram-positive cocci (n = 103)	MIC₉₀	> 32	8	4	4	2	2
Gram-positive bacilli and cocci (n = 221)	MIC₅₀	8	4	2	0.5	0.5	1
Gram-positive bacilli and cocci (n = 221)	MIC₉₀	> 32	16	8	2	2	4

AMI, amikacin; EST, streptomycin; GEN, gentamicin; MIC₅₀, MIC value at which ≥50% of the isolates were inhibited; MIC_90, MIC value at which ≥90% of the isolates were inhibited PEN, penicillin; TET, tetracycline; VAN, vancomycin