Growth-Death Kinetics of Listeria Monocytogenes in Strained Yogurt

Figures & data

Table 1 Logarithmic counts (log cfu/g) of L. monocytogene s in strained (Torba) yogurt during the storage at 4 °C

Samples	Groups	pH	L. monocytogenes	S. thermophilus	Lb. delbrueckii ssp. bulgaricus	TAMB
First hour	A1	6.32 ± 0.00 ^a	6.75 ± 0.00 ^a	^−	−	−
	A2	6.32 ± 0.01 ^a	4.78 ± 0.02 ^b	^−	−	−
	B1	6.31 ± 0.00 ^a	6.75 ± 0.01 ^a	−	−	−
	B2	6.32 ± 0.02 ^a	4.78 ± 0.07 ^b	−	−	−
1^st day	A1	4.08 ± 0.00 ^a	5.68 ± 0.00 ^a	7.45 ± 0.04 ^b	4.58 ± 0.10 ^a	7.57 ± 0.19 ^a
	A2	4.07 ± 0.00 ^ab	3.78 ± 0.02 ^c	7.69 ± 0.00 ^a	4.50 ± 0.24 ^a	7.32 ± 0.00 ^a
	B1	4.05 ± 0.02 ^b	5.20 ± 0.01 ^b	7.49 ± 0.00 ^b	4.48 ± 0.07 ^a	7.00 ± 0.04 ^b
	B2	4.08 ± 0.01 ^a	1.60 ± 0.00 ^d	7.36 ± 0.03 ^c	4.72 ± 0.00 ^a	7.34 ± 0.00 ^a
3^rd day	A1	3.58 ± 0.00 ^a	4.66 ± 0.54 ^a	7.48 ± 0.00 ^b	4.73 ± 0.08 ^a	7.40 ± 0.08 ^a
	A2	3.59 ± 0.00 ^a	1.70 ± 0.04 ^b	7.53 ± 0.00 ^b	4.90 ± 0.16 ^a	7.43 ± 0.06 ^a
	B1	3.58 ± 0.01 ^a	4.07 ± 0.06 ^a	8.32 ± 0.07 ^a	4.96 ± 0.05 ^a	7.41 ± 0.00 ^a
	B2	3.58 ± 0.01 ^a	1.00 ± 0.00 ^b	7.40 ± 0.08 ^b	4.90 ± 0.04 ^a	7.20 ± 0.00 ^b
7^th day	A1	3.55 ± 0.00 ^b	3.41 ± 0.07 ^a	7.26 ± 0.07 ^ab	4.68 ± 0.16 ^a	7.41 ± 0.25 ^a
	A2	3.55 ± 0.00 ^b	ND ^c	7.08 ± 0.07 ^b	4.56 ± 0.05 ^a	7.08 ± 0.02 ^a
	B1	3.56 ± 0.01 ^ab	1.48 ± 0.00 ^b	7.41 ± 0.09 ^a	4.48 ± 0.02 ^a	7.08 ± 0.07 ^a
	B2	3.57 ± 0.00 ^a	ND ^c	7.10 ± 0.04 ^b	4.58 ± 0.00 ^a	7.04 ± 0.05 ^a
15^th day	A1	3.59 ± 0.00 ^a	≤10	7.44 ± 0.00 ^a	3.92 ± 0.07 ^ab	7.41 ± 0.25 ^a
	A2	3.58 ± 0.01 ^a	ND	7.48 ± 0.26 ^a	4.10 ± 0.08 ^a	7.08 ± 0.02 ^a
	B1	3.57 ± 0.00 ^a	ND	7.26 ± 0.05 ^a	3.78 ± 0.07 ^bc	7.08 ± 0.07 ^a
	B2	3.59 ± 0.03 ^a	ND	7.43 ± 0.06 ^a	3.68 ± 0.02 ^c	7.04 ± 0.05 ^a
30^th day	A1	3.55 ± 0.02 ^a	ND	7.32 ± 0.22 ^a	4.55 ± 0.00 ^a	7.30 ± 0.20 ^a
	A2	3.56 ± 0.00 ^a	ND	7.30 ± 0.24 ^a	4.25 ± 0.20 ^a	7.35 ± 0.29 ^a
	B1	3.55 ± 0.01 ^a	ND	7.26 ± 0.25 ^a	4.32 ± 0.24 ^a	7.45 ± 0.00 ^a
	B2	3.55 ± 0.00 ^a	ND	7.30 ± 0.23 ^a	4.33 ± 0.24 ^a	7.50 ± 0.22 ^a
−: not analyzed; ND: not detected; TAMB: Total aerobic mesophilic bacteria. ^a,b,c: Letters in a column indicate statistically differences among groups at p < 0.05.