Table 1.

Strains used in this study

Species	Strain identification	Reference
S. aureus	SH1000	Horsburgh et al. (2002)
S. epidermidis	B155 (inhibitor producing)	Libberton et al. (2014)
S. epidermidis	B180 (inhibitor producing)	Libberton et al. (2014)
S. epidermidis	B035 (noninhibitor producing)	Libberton et al. (2014)
S. epidermidis	B115 (noninhibitor producing)	Libberton et al. (2014)