Table 1.

Oligonucleotides used in this study.

Gene	Function	Primer sequences	References
hilA	Transcriptional regulator of SPI-1	F: 5′-TGTCGGAAGATAAAGAGCAT-3′R: 5′-AAGGAAGTATCGCCAATGTA-3′	(19)
ssrB2	Transcriptional regulator of SPI-2	F: 5′-TGGTTTACACAGCATACCAA-3′R: 5′-GGTCAATGTAACGCTTGTTT-3′	(19)
16S	16S rRNA gene, used as housekeeping gene	F: 5′-CAAGTCATCATGGCCCTTAC-3′R: 5′-CGGACTACGACGCACTTTAT-3′	(20)
ropD	Sigma factor, used as housekeeping gene	F: 5′-GTGAAATGGGCACTGTTGAACTG-3′R: 5′-TTCCAGCAGATAGGTAATGGCTTC-3′	(21)
gmk	Guanylate kinase, used as housekeeping gene	F: 5′-TTGGCAGGGAGGCGTTT-3′R: 5′-GCGCGAAGTGCCGTAGTA AT-3′	(22)