Table 2. Bacterial strains used in this study.

Strain	Remarks	Source
S. aureus 6850		Vann and Proctor, 1987
S. aureus 6850 ∆hlb	deficient in β-toxin production	Grosz et al., 2014
S. aureus Cowan I	NCTC 8530, isolated from septic arthritis, agr dysfunction, low expression of toxins and proteases	ATCC 12598
S. aureus JE2	MRSA, USA300	Fey et al., 2013
S. aureus JE2 ∆hla	deficient in α-toxin production	Becker et al., 2018
S. aureus JE2 ∆hlb	deficient in β-toxin production	Krones et al., 2021
S. aureus JE2 SarAP1 Cerulean	Constitutive expression of the fluorescence protein Cerulean	Stelzner et al., 2020
S. aureus JE2 SarAP1 mRFP	Constitutive expression of the fluorescence protein mRFP	Stelzner et al., 2021
S. aureus JE2 pCer	Anhydrous tetracycline (AHT) inducible expression of Cerulean, construct published in Giese et al., 2011 and was transduced into S. aureus JE2	This work
S. aureus JE2 pCer +hlb	Anhydrous tetracycline (AHT)inducible expression of Cerulean and β-toxin, construct published in Giese et al., 2011 and was transduced into S. aureus JE2	This work
S. aureus Cowan I SarAP1 Cerulean	Constitutive expression of the fluorescent protein Cerulean	This work
S. aureus 6850 SarAP1 Cerulean	Constitutive expression of the fluorescent protein Cerulean	Stelzner et al., 2021
S. aureus 6850 ∆hlb SarAP1 Cerulean	Constitutive expression of the fluorescent protein Cerulean	This work