. 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)
Extracts	B. subtilis	E. coli	P. aeruginosa	S. aureus
P. crispa methanolic crude extract	16^b	15^b	15^b	19^a
P. undulata methanolic crude extract	18^b	16^b	16^b	15^b
P. crispa essential oil	17^b	16^b	17^b	18^ab
P. undulata essential oil	25^a	17^b	24^a	17^ab
Gentamicin*	19^b	22^a	17^b	16^ab
Tetracycline*	23^a	16^b	16^b	15^b
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.