. 2008 Jun 27;74(17):5563–5567. doi: 10.1128/AEM.00319-08

TABLE 3.

Mean (n = 3) shoulder durations and inactivation rates (± standard deviations) of individual Listeria monocytogenes strains in a simulated gastrointestinal system (GC at pH 2.0 within 88 min; IC at pH 6.5; 37°C) after inoculation (1 ml) into 100 ml of TSBYE-G and incubation for 16 h at 30°C^b

Strain	GC		IC
Strain	Shoulder duration (min)^a	Maximum inactivation rate (log CFU/ml/min)	Shoulder duration (min)^a	Maximum inactivation rate (log CFU/ml/min)
558	63.73 ± 16.28^A	0.043 ± 0.028^AD		0.002 ± 0.002^AB
R2-500		0.009 ± 0.001^A		0.000 ± 0.003^A^c
R2-501	71.17 ± 1.00^A	0.023 ± 0.001^A		0.003 ± 0.005^AB
Scott A	74.71 ± 1.59^A	0.197 ± 0.010^B		0.008 ± 0.005^ABD
N1-225	70.45 ± 3.30^A	0.039 ± 0.009^AD		0.003 ± 0.001^AB
N1-227	70.35 ± 2.94^A	0.092 ± 0.001^BD		0.004 ± 0.001^AB
C1-056	70.74 ± 4.99^A	0.221 ± 0.013^C		0.014 ± 0.010^BC
N3-031	86.48 ± 2.32^A	0.047 ± 0.007^AD	1.32 ± 2.29	0.016 ± 0.004^BC
J1-101	68.15 ± 1.55^A	0.062 ± 0.010^AD		0.018 ± 0.007^CD
10403S	67.35 ± 2.77^A	0.048 ± 0.003^AD		0.010 ± 0.005^BC
A1-254	83.68 ± 22.73^A	0.188 ± 0.113^B		0.021 ± 0.013^C
J1-158	76.66 ± 1.30^A	0.103 ± 0.019^BD		0.008 ± 0.006^ABD
J1-168	65.32 ± 7.12^A	0.049 ± 0.008^AD		0.009 ± 0.006^BC

Latency to death. For blank cells, no shoulder was observed (inactivation was immediate).

Different superior capital letters within a column show significantly different data (P < 0.05).

The slope of the survival curve was zero, indicating that no inactivation occurred.