Figure 2: Full regression model1 fit to growth of S. aureus, as measured by
estimated log colony forming units (CFU),treated with PGF_{2α} 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).^{1}Model: Y=β_{0}+β_{1}x+β_{2}x^{2}+ε_{1}, where β_{0} represents y-intercept at time of
inoculation; β_{1} represents the rate at which bacterial growth increases; β_{2}
represents point of inflection where growth reached its maximum at a specific
time; ε_{1} 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 (β _{1}) was less (P<0.05) for 1.2 mg/ml
PGF_{2α} treatment when compared with 0 and 0.6 mg/mL treatment. |