Peptostreptococcus anaerobius and Zosyn
Concentration
(μg/ml)
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Zosyn
1
0.05
Zosyn
1
0.25
1
2
MIC50
MIC90
Strain Number