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. 2020 Oct 13;10:17148. doi: 10.1038/s41598-020-74262-y

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.