Changes in the viable cell count of S. aureus FDA209P in medium that contained the diterpenes geranylgeraniol (a), teprenone (b), and phytol (c). S. aureus FDA209P was inoculated into BHI medium that contained no terpene (○) or that contained a diterpene at 2.5 (□), 5 (▵), 10 (♦), 20 (▪), 40 (▴), or 80 (•) μg/ml.