(A)
S. aureus SC01 derivative strain grown in TSB and TSBMg for 5 days at 37°C. (B) Progression of O, W and Y strains when growing in TSBMg for 5 days at 37°C. Scale bars 1 mm. (C) Measurements of Staphyloxanthin production, biofilm formation and secretion of hemolytic toxins in O, W and Y strains. C+ is LAC strain and C− is LAC ΔσB mutant. Hemolysis efficiency used LAC ΔσB mutant as a C+ and C− is LAC strain. (D) qRT-PCR of the expression staphyloxanthin production (crt), biofilm formation (ica and spa) and hemolytic toxins (hla) in O, W and Y strains in TSB and TSBMg growing media (Student’s t-test p ≤ 0.05). See figs. S1, S2.