Table 2.
Antibacterial activity of P. crispa and P. undulata methanolic crude extracts, and the essential oils against the bacterial microorganisms.
Extracts | Bacterial microorganisms mean diameter inhibition zone (mm) | |||
---|---|---|---|---|
B. subtilis | E. coli | P. aeruginosa | S. aureus | |
P. crispa methanolic crude extract | 16b | 15b | 15b | 19a |
P. undulata methanolic crude extract | 18b | 16b | 16b | 15b |
P. crispa essential oil | 17b | 16b | 17b | 18ab |
P. undulata essential oil | 25a | 17b | 24a | 17ab |
Gentamicin* | 19b | 22a | 17b | 16ab |
Tetracycline* | 23a | 16b | 16b | 15b |
0.05% LSD | 3.727 | 3.246 | 3.702 | 3.324 |
(*)Positive control at the concentration of (40 mg/ml).
Means separated by least significant difference (LSD) test at p < 0.05.
Means followed by a similar letter(s) in the same column are not significantly different at p ≤ 0.05 according to the least significant difference test.