Table 2.

Ratios of gene expression between the lysogenic strains and their parents.

Genes	Mean fold-change ± SEM
	S123Sa2/S123	S124Sa2/S124
clfA	2.1 ± 0.2	1.2 ± 0.2
fnbpA	6.7 ± 0.8	2.0 ± 0.3
cna	1.3 ± 0.1	2.1 ± 0.1
trap	1.2 ± 0.1	ND
agr (RNAIII)	0.7 ± 0.1	ND

Data are expressed as the mean ratio value of fold change ± range obtained by comparing cycle of quantification (CQ) in S123Sa2 or S124Sa2 to CQ of the corresponding parent S123 or S124 (control strains). The level of transcription of the hu gene was used to normalize RNA amounts. The values represent averages of duplicate determinations from two independent experiments.