TABLE 1.

Bacterial strains and plasmids used in this study

Strain or plasmid	Relevant characteristics	Source or reference
Strains
S. enterica serovar Typhimurium 14028	Wild type	ATCC 14028
S. enterica serovar Typhimurium CS132	Isogenic to 14028 containing luxS::MudJ	41
S. enterica serovar Typhimurium SS007	Isogenic to 14028 containing luxS::T-POP	35
V. harveyi BB170	Isogenic to wild-type BB120 containing luxN::Tn5Kn	3
Plasmids
pCS26	Low-copy-number luxCDABE reporter vector	C. Southward
pAB12	pCS26 containing luxS promoter	This study
pAB13	pCS26 containing pfs promoter	This study
pBAD18	Arabinose-inducible expression vector	Invitrogen; 21
pMS234	pBAD18 containing luxS	35