. 2020 Dec 15;11(4):339–346. doi: 10.30466/vrf.2018.91902.2223

Table 2.

The inhibition zones (mm; mean ± SD) of four essential oils (EOs) detected by the disc diffusion method

EOs	Tested bacteria	EO concentration (µL per disc)				Gentamycin (10.00 µg per disc)
EOs	Tested bacteria	5.00	10.00	15.00	20.00	Gentamycin (10.00 µg per disc)
ZEO	*E. coli O157:H7*	12.00 ± 0.80^d	15.00 ± 1.01^d	19.00 ± 0.50^d	24.00 ± 1.17^d	22.00 ± 0.50^b
	*L. monocytogenes*	9.00 ± 0.70^b	12.00 ± 1.01^b	16.00± 1.20^b	17.00 ± 0.50^b	21.00 ± 1.09^a
	*P. fluorescens*	8.00 ± 0.52^a	11.00 ± 1.01^a	13.00 ± 0.40^a	16.00 ± 0.70^a	23.00 ± 0.70^c
	*S. putrefaciens*	11.00 ± 0.30^c	14.00 ± 0.60^c	18.00 ± 1.10^c	23.00 ± 1.00^c	24.00 ± 1.10^d
OEO	*E. coli O157:H7*	11.00 ± 0.50^b	14.00 ± 0.70^d	16.00 ± 1.11^c	21.00 ± 0.40^c	22.00 ± 0.51^b
	*L. monocytogenes*	8.00 ± 0.71^a	11.00 ± 1.20^b	15.00 ± 0.70^b	17.00 ± 0.54^b	21.00 ± 1.01^a
	*P. fluorescens*	8.00 ± 0.80^a	10.00 ± 0.10^a	13.00 ± 0.40^a	16.00 ± 0.71^a	23.00 ± 0.70^c
	*S. putrefaciens*	11.00 ± 0.70^b	13.00 ± 0.50^c	17.00 ± 1.21^d	22.00 ± 0.80^d	24.00 ± 1.10^e
SEO	*E. coli O157:H7*	7.00 ± 0.10^a	8.00± 0.40^b	8.00 ± 0.50^a	9.00 ± 0.70^a	22.00 ± 0.50^b
	*L. monocytogenes*	7.00 ± 0.43^a	7.00 ± 0.53^a	8.00 ± 0.50^a	9.00 ± 0.50^a	21.00 ± 1.08^a
	*P. fluorescens*	7 .00± 0.01^a	8.00 ± 0.10^b	9.00 ± 0.41^b	10.00 ± 1.11^b	23.00 ± 0.70^c
	*S. putrefaciens*	7 .00± 0.01^a	8.00 ± 0.70^b	10.00 ± 0.50^c	13.00 ± 1.21^c	24.00 ± 1.13^d
CEO	*E. coli O157:H7*	7.00± 0.13^a	9.00 ± 0.50^a	12.00 ± 1.10^b	14.00 ± 0.80^b	22.00 ± 0.50^b
	*L. monocytogenes*	8.00± 0.50^b	9.00 ± 0.73^a	11.00 ± 0.43^a	13.00 ± 1.20^a	21.00 ± 1.00^a
	*P. fluorescens*	9.00 ± 0.41^c	11.00 ± 0.50^b	14.00 ± 1.30^c	17.00 ± 1.10^d	23.00 ± 0.70^c
	*S. putrefaciens*	9.00 ± 0.57^c	12.00 ± 0.70^c	14.00 ± 0.50^c	16.00 ± 1.20^c	24.00 ± 1.10^d

OEO: Origanum vulgare essential oil; ZEO: Zataria multiflora essential oil; SEO: Syzygium aromaticum essential oil; CEO: Cinnamomum verum essential oil. ^abcde Different superscript letters within the same EOs column and concentrations are significantly different (p < 0.05).