Figure 2: Full regression model1 fit to growth of S. aureus, as measured by estimated log colony forming units (CFU),treated with PGF2α at concentrations of 0 (dimonds), 0.3 mg/ml (squares), 0.6 mg/mL (triangles), 1.2 mg/mL (circles) and 2.4 mg/mL (stars). 1Model: Y=β0+β1x+β2x2+ε1, where β0 represents y-intercept at time of inoculation; β1 represents the rate at which bacterial growth increases; β2 represents point of inflection where growth reached its maximum at a specific time; ε1 represents random error. *Overall line of bacterial growth for each treatment differs (P<0.05) from control. The treatment 2.4 mg/mL was not included in contrasts. The rate of bacterial growth over time (β1) was less (P<0.05) for 1.2 mg/ml PGF2α treatment when compared with 0 and 0.6 mg/mL treatment.