Research Article

Antibacterial Properties of Alkaloid Extracts from Callistemon citrinus and Vernonia adoensis against Staphylococcus aureus and Pseudomonas aeruginosa

Figure 1

The effect of ampicillin, C. citrinus, and V. adoensis alkaloids on growth of S. aureus and P. aeruginosa. Concentrations of 1.67 mg/mL and 1 × 106 cfu/mL of the extract and bacteria, respectively, were used. Values are expressed as mean absorbance at 600 nm wavelength ± standard deviation ().