Table 1 Antimicrobial activity of methanolic extracts of R. californica and U. californica analyzed by Kirby-Bauer disc-diffusion assay
Bacterial Strains | |||||||
|---|---|---|---|---|---|---|---|
Diameter of Zone of Inhibition (mm) | |||||||
Plants | Dose (mg) | B. cereus ATCC® 14579 | E. coli ATCC® 25922 | P. aeruginosa ATCC® 10145 | S. aureus ATCC® 25923 | MRSA 1 ATCC® BAA-1683 | S. pyogenes 1 ATCC® 10782 |
R. californica | |||||||
Leaves | 1 | 10.0 ± 2.1 | -- | -- | -- | 10.0 | 9.0 |
5 | 12.3 ± 0.5 | -- | -- | 11.0 ± 1.2** | 15.0 | 12.0 | |
10 | 13.0 ± 0.0 | -- | -- | 12.5 ± 2.1Ψ | 16.0 | 14.0 | |
25 | 14.3 ± 0.5 | -- | -- | 14.0 ± 1.4** | n.t. | n.t. | |
U. californica | |||||||
Leaves | 1 | 9.0 ± 0.0 | -- | -- | -- | 8.0 | 8.0 |
5 | 9.5 ± 0.5 | -- | -- | 9.3 ± 1.0** | 9.0 | 11.0 | |
10 | 9.3 ± 0.5 | -- | -- | 10.5 ± 1.4Ψ | 10.0 | 15.0 | |
25 | 10.0 ± 0.0 | -- | -- | 10.9 ± 2.0** | n.t. | n.t. | |
Bark | 1 | -- | -- | -- | 8.0 ± 0.0Ψ | -- | -- |
5 | 9.3 ± 0.5 | -- | -- | 12.8 ± 2.6** | 9.0 | 8.0 | |
10 | 10.3 ± 0.5 | -- | -- | 17.5 ± 1.4Ψ | 10.0 | 11.0 | |
25 | 11.7 ± 0.5 | -- | -- | 16.0 ± 1.2** | n.t. | n.t. | |
Streptomycin | 0.01 | 23.8 ± 1.2 | 19.8 ± 0.2 | 10.4 ± 0.3 | 18.9 ± 1.0 | 17.0 ± 0.0 | 18.0 ± 0.0 |
Methanol | 100 % | -- | -- | -- | -- | -- | -- |