Inhibitory effects of geranylgeraniol on the growth of S. aureus FDA209P. S. aureus FDA209P was inoculated into BHI broth medium that contained no geranylgeraniol (○) or into broth that contained geranylgeraniol at 0.15 (•), 0.3 (▴), 0.6 (▪), or 1.25 (♦) μg/ml (a) or 1.25 (♦), 2.5 (▵), 5.0 (□), 10 (⋄), 20 (•), 40 (▴), 80 (▪), or 160 (▾) μg/ml (b), and then cell growth was monitored in terms of the OD660.