TABLE 2.

Model parameters for all fixed effects in the temperature model for L. monocytogenes counts.

Response variable	Fixed effects	Levels	Estimate	Standard error	P-value	Significance
L. monocytogenes count (log cfu/g)	Temperature (°C)	6	Ref1
		14	0.14	0.22	0.541
		22	0.10	0.23	0.666
	Nisin	N2	Ref
		Y3	−3.44	0.29	<0.001	***
	Day	1	Ref
		7	0.26	0.21	0.227
		14	0.31	0.21	0.151
	Strain	10403S	Ref
		5621	0.31	0.12	0.008	**
		5623	0.30	0.12	0.010	*
		5624	0.39	0.12	0.001	**
		5625	0.38	0.12	0.001	**
	Inoculum4 (log cfu/g)		0.05	0.11	0.676
	Milk apc5 (log cfu/mL)		0.00	0.09	0.967
	Temperature:Nisin Y	6:Nisin Y	Ref
		14:Nisin Y	0.97	0.30	0.002	**
		22:Nisin Y	1.39	0.30	<0.001	***
	Nisin Y:Day	Nisin Y:1	Ref
		Nisin Y:7	1.05	0.30	0.001	**
		Nisin Y:14	1.59	0.30	<0.001	***
	Nisin Y:Strain	Nisin Y:Strain 10403S	Ref
		Nisin Y:Strain 5621	0.45	0.16	0.007	**
		Nisin Y:Strain 5623	0.33	0.16	0.043	*
		Nisin Y:Strain 5624	0.08	0.16	0.626
		Nisin Y:Strain 5625	0.66	0.16	<0.001	***

¹Ref indicates reference; therefore, estimates, standard error, and P-values were not calculated. ²N denotes the absence of nisin. ³Y denotes the presence of nisin. ⁴Average number (log cfu/g) of L. monocytogenes inoculated onto each cheese. ⁵Bacterial aerobic plate counts (apc; log cfu/mL) in milk before cheese was made. *** P < 0.001; ** P < 0.01; * P < 0.05.