Table 2.

Populations of Listeria monocytogenes ATCC 19117 (Log₁₀ cfu/g) in bovine ground meat treated with clove and lemongrass essential oils during storage under refrigeration temperature (5 ± 2°C) for three days.

Essential Oil	Concentration (%)	Log10 cfu/g days of storage
		1	2	3
S. aromaticum	0.00	6.39 (± 0.04) aA	6.37 (± 0.05) aA	6.30 (± 0.15) aA
S. aromaticum	6.250	0.33 (± 0.33) aE	0.00 (± 0.00) aE	0.00 (± 0.00) aD
S. aromaticum	3.125	3.42 (± 0.06) aD	0.00 (± 0.00) bE	0.00 (± 0.00) bD
S. aromaticum	1.560	4.24 (± 0.13) aC	3.66 (± 0.05) aC	1.72 (± 0.37) bC
C. citratus	0.00	4.91 (± 0.05) aB	4.80 (± 0.03) aB	4.92 (± 0.06) aB
C. citratus	6.250	0.00 (± 0.00) aE	0.00 (± 0.00) aE	0.00 (± 0.00) aD
C. citratus	3.125	0.00 (± 0.00) aE	0.00 (± 0.00) aE	0.00 (± 0.00) aD
C. citratus	1.560	3.10 (± 0.13) aD	1.33 (± 0.88) bD	0.00 (± 0.00) cD

Means values ± Standard error.

Values followed by the different small letter within the same line, and by the different capital letter within the same column, are significantly different (p ≤ 0.05) according to Scott-Knott test.

Initial inoculum of L. monocytogenes 10⁶ cfu/g.