Fig 1.
Relationship between cells/mL and OD with different fits.
The solid lines and round points represent 96-well measurements, and the dashed lines and square points represent 384-well measurements for E. coli.
Table 1.
R2 values for the different fits for each of the four bacterial genera measured.
Table 2.
Calibration equations and cell size.
Fig 2.
Growth curves of S. epidermidis in one well based on different measures of population density.
The natural log of OD (circles) and cells per mL (squares) is plotted over time (minutes).
Fig 3.
Growth curves based on OD and based on scaled cells/mL.
The values obtained for cells/mL have been scaled to fit on the same scale as OD by dividing cells/mL by 1.07 x 109. Curves based on OD are represented by open circles and scaled represented by closed circles.
Table 3.
Comparison of growth rates based on OD and cells/mL.