Table 2.

Strains and plasmids used in this study

Strains	Relevant characteristic	Reference
S. aureus 8325-4	wild type	[27]
8325-4 hssR::bursa	resistant mutant, bursa insertion	This work
8325-4 hssR	hssR mutation transduced from 8325-4 hssR::bursa	This work
S. aureus 15981	wild type	[34]
S. aureus 15981ΔTCS15	hssRS deletion	[18]
8325-4 hssR::bursa/pRMC2-hssRS	Complementation of the transposon mutant	This work
L. monocytogenes 4446	wild type	[35]
L. monocytogenes LO28	wild type	[36]
LO28 RR23	rr23 mutant	[22]
Plasmids
pRMC2	Tetracycline inducible expression vector	[37]
pRMC2-hssRS	hssRS cloned into pRMC2, complementation plasmid	This work