FIG. 5.

Linear regression plots of composite enumeration results for artificially inoculated peptone (0.1%) and water. (a) Respiring O157 cells (CTC positive, FAb positive) enumerated by IMS versus the number used as the inoculum. (b) Respiring O157 cells enumerated by IMS versus SMAC plate counts of inoculated cells. (c) SMAC plate counts of cells enumerated by IMS versus SMAC plate counts of inoculated cells. The solid line represents the linear regression, and the dotted lines indicate the 95% confidence interval.