Expression levels of envZ and rpoS genes in Salmonella WT and isogenic mutants. A qRT-PCR of envZ in LB 1% and 2% NaCl. Relative fold expression of envZ in WT, ΔvisP, visP + , ΔwzzST, wzzST + , and ΔvisP/wzzST strains. ns, non-significant; ***p < 0.001; ****p < 0.0001. B qRT-PCR of rpoS in LB 1% and 2% NaCl. Relative fold expression of rpoS in WT, ΔvisP, visP + , ΔwzzST, wzzST + , and ΔvisP/wzzST strains. ns, non-significant; ****p < 0.0001