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Antimicrobial activity of different polyamide resin elution fractions from Bletilla striata fibrous root ethanol extract
| Indicator strain | Inhibition zone size (mm diameter) | |||||
|---|---|---|---|---|---|---|
| EF20a | EF40a | EF60a | EF80a | EF95a | Ampb | |
| Staphylococcus aureus ATCC 25923 | NA | 12 ± 0.4 | 21 ± 0.7 | NA | NA | 27 ± 0.6 |
| Escherichia coli ATCC 35218 | NA | NA | NA | NA | NA | 20 ± 0.3 |
aRelative inhibition zone (mm) at 100 μg per paper disc
bRelative inhibition zone (mm) at 10 μg per paper disc
Amp ampicillin
NA no activity
