Comparison of In Vitro Antibacterial Activity of Epaltes divaricata and Vetiveria zizanioides against Methicillin-Resistant Staphylococcus aureus
Table 1
Diameter values of the disk diffusion assay of E. divaricata and V. zizanioides against MSSA and MRSA strains.
Extract
Concentration
Inhibition zone diameter (mm)
MRSA
MSSA (ATCC 25923)
E. divaricata
V. zizanioides
E. divaricata
V. zizanioides
Hexane
40 mg/mL (crude)
9.9 (6.7–13.1),n = 20
8.3 (6.5–11.4), n = 20
13.7 ± 0.1
11.4 ± 0.2
4 mg/mL (10x dilution)
—
—
—
—
0.4 mg/mL (100x dilution)
—
—
—
—
Ethanol
300 mg/mL (crude)
15.4 (13.1–18.7), n = 20
8.7 (6.4–13.3), n = 8
16.3 ± 0.2
12.1 ± 0.2
30 mg/mL (10x dilution)
10.1 (7.4–11.7), n = 18
6.8 (6.3–9.0), n = 8
13.4 ± 0.2
7.3 ± 0.3
3 mg/mL (100x dilution)
7.1 (6.3–10.1), n = 8
—
7.6 ± 0.1
—
Aqueous
150 mg/mL (crude)
9.4 (6.6–15.6), n = 20
—
7.4 ± 0.2
—
15 mg/mL (10x dilution)
—
—
—
—
1.5 mg/mL (100x dilution)
—
—
—
—
Vancomycin
30 μg/disc
20.6 ± 2.2
20.8 ± 0.1
n denotes the number of isolates that showed a measurable diameter; data were expressed as mean (min-max); data were expressed as mean ± SEM; mean ± standard deviation.
