Table 1. Lack of change in mRNA levels for Shiga-like toxin genes in O157:H7 cells treated with 0.8% bile salts relative to control (calculations of “fold change” are based on triplicate culture/microarray experiments for each treatment).

Gene symbol	Gene name & function	Fold change	p-value
stx1A	Shiga-like toxin 1 - virulence	1.06 (insignificant)	NS
stx1B	"	1.15 (insignificant)	NS
stx2A	Shiga-like toxin 2 - virulence	1.06 (insignificant)	NS
stx2B	"	.90 (insignificant)	NS

“NS” denotes “not significant” for p-values > 0.05.