Fig. 4From: Characterization of the antibacterial activity from ethanolic extracts of the botanical, Larrea tridentataEffect of clavulanic acid on the growth of the botanical-resistant S. aureus strain. Bacterial cultures (Staph PenS, ATCC 14775; and Staph LarreaR) were treated with increasing concentrations of the L. tridentata extract ranging from 1 to 1000 μg non-volatile constituents/ml media in the presence or absence of clavulanic acid (6 μg/ml). The MBC was determined at 24 h. Values shown with error bars represent the standard deviation from three separate experiments. Statistical analysis was performed using a paired t-test. Samples with statistically significant differences are indicated with the calculated p-valueBack to article page