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Fig. 5 | BMC Complementary Medicine and Therapies

Fig. 5

From: Characterization of the antibacterial activity from ethanolic extracts of the botanical, Larrea tridentata

Fig. 5

Effect of β-lactamase on the antibacterial activity of penicillin and L. tridentata extract. A penicillin stock solution or L. tridentata extract were treated with 0.25 or 2.5 U/ml β-lactamase followed by inactivation of the β-lactamase. Bacterial cultures of non-antibiotic resistant S. aureus (ATCC 14775) were treated with increasing concentrations of the treated or untreated penicillin stock solution (20–200 μg/ml) or L. tridentata extract (ranging from 1 to 1000 μg non-volatile constituents/ml media). The MBC 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-value

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