TABLE 1.

Bacterial strains

Strain	Description or genotype	Reference or source
S. aureus SH1000	Wild type	17
S. aureus SH1001	agr mutation in SH1000	17
S. aureus RN4220	Accepts E. coli DNA	18
S. aureus mnhA::Tn917	Tn917 inserted into mnhA in SH1000	This study
S. aureus ΔmnhF	ΔmnhF mutation in SH1000	This study
E. coli TOP10	F− mcrA Δ(mrr-hsdRMS-mcrBC) ϕ80lacZΔM15 ΔlacX74 nupG recA1 araD139 Δ(ara-leu)7697 galE15 galK16 rpsL(Strr) endA1 λ−	Invitrogen
E. coli TG1	F′ [traD36 proAB+ lacIq lacZΔM15] supE thi-1 Δ(lac-proAB) Δ(mcrB-hsdSM)5 (rK− mK−)	Lucigen