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. Author manuscript; available in PMC: 2015 Aug 7.
Published in final edited form as: Planta Med. 2012 Jul 18;78(14):1556–1561. doi: 10.1055/s-0032-1315042

Fig. 2.

Fig. 2

Comparison of antimicrobial activity of goldenseal (Hydrastis canadensis) leaf extract and berberine against MRSA strain USA300 AH1263 [22]. The extract was standardized to berberine content, which is displayed on the x-axis. Different concentrations were prepared via two-fold serial dilution for both test samples. The leaf extract showed an MIC value at 38 µg/mL (expressed as µg berberine/mL assay volume), which is three times lower than the MIC of isolated berberine at 150 µg/mL. Error bars represent standard deviation for OD600 of triplicate assay wells.