From: The anti-Staphylococcus aureus activity of the phenanthrene fraction from fibrous roots of Bletilla striata
Indicator strain
Inhibition zone size (mm diameter)
EF20a
EF40a
EF60a
EF80a
EF95a
Ampb
Staphylococcus aureus ATCC 25923
NA
12 ± 0.4
21 ± 0.7
27 ± 0.6
Escherichia coli ATCC 35218
20 ± 0.3