Table 6.

Interaction of cell treatments and time on α-toxin gene expression (P<0.05)

Time (h)	0		2		5		SEM	P-value
Bacterial treatments	Contact with Caco-2	Non-contact with caco-2	Contact with Caco-2	Non-contact with caco-2	Contact with Caco-2	Non-contact with caco-2
Mean gene expression	5.100b	4.140a	4.347	4.153	4.303	4.790	0.28	0.072

The means with dissimilar letters have significant differences based on Duncan’s multiple range tests and the means with the same letter are not significantly different. SEM: Standard error of the mean