. Author manuscript; available in PMC: 2011 Nov 1.

Published in final edited form as: Foodborne Pathog Dis. 2010 Aug 14;7(11):1337–1349. doi: 10.1089/fpd.2010.0563

Table 2.

Caco-2 Invasion Efficiencies of Listeria monocytogenes 10403s and Select Mutants After Exposure to Varying Temperature Treatments

Growth temperature	Temperature of PBS hold (2.5 h)	Caco-2 invasion efficiency (calculated as [CFU recovered/CFU infected] × 100) (SD) for^a
Growth temperature	Temperature of PBS hold (2.5 h)	10403S	ΔcheY	ΔdegU	ΔflaA	ΔinlA
30°C	None	0.67 (0.17)^A	0.018 (0.007)^B,*	0.015 (0.008)^B,*	0.014 (0.010)^B,*	0.024 (0.010)^A,*
30°C	30°C	0.64 (0.19)^A	0.013 (0.003)^B,*	0.010 (0.005)^B,*	0.010 (0.006)^B,*	0.023 (0.007)^A,*
30°C	37°C	0.36 (0.10)^A	0.006 (0.002)^B,*	0.007 (0.002)^B,*	0.007 (0.004)^B,*	0.014 (0.005)^A,*
37°C	None	0.14 (0.03)^B	0.14 (0.06)^A	0.20 (0.05)^A	0.14 (0.06)^A	0.0008 (0.0003)^B,*
37°C	37°C	0.11 (0.04)^B	0.12 (0.05)^A	0.14 (0.10)^A	0.09 (0.06)^A	0.0007 (0.0007)^B,*
37°C	30°C	0.11 (0.03)^B	0.13 (0.05)^A	0.17 (0.08)^A	0.14 (0.07)^A	0.0007 (0.0005)^B,*

Within a given column values with identical letters (A or B) are not significantly different (p ≥ 0.05; post hoc Tukey HSD test). Within a given row, invasion efficiencies that are lower for a given mutant than the parent strain exposed to the same condition (p ≤ 0.05; post hoc Dunnett’s test) are marked with an asterisk (*). Data represent the mean and standard deviation of three biological replicates.

PBS, phosphate-buffered saline; SD, standard deviation; ANOVA, analysis of variance; HSD, honestly significantly different.