Shiga-toxin producing Escherichia coli (STEC) serogroups exhibit varied thermal susceptibility in marinated beef products (original) (raw)

surviving L. innocua cells were differentially enumerated by plating on modified Oxford's (MOX) agar not containing antimicrobic supplement to allow repair and colony formation of sub-lethally injured L. innocua cells. Replicate-specific L. innocua reductions were calculated as log 10 CFU/cm 2 of control minus log 10 CFU/cm 2 of the enumerated survivors for each sanitizer-treated site. Least squares means of reductions were calculated with a α = 0.05, using the general linear model of SAS. Significant differences were determined using the PDIFF function (P b 0.05). Results: All three sanitizer treatments differed (P b 0.05) from each other with Cl producing the least reduction (1.46 log 10 CFU/cm 2) and WF the greatest reduction (2.83 log 10 CFU/cm 2). There was not an effect of sanitizer contact time on reductions of L. innocua observed; a significant (P b 0.05) site by treatment interaction was observed. Conclusion: The results of the study indicate that QAC sanitizers (600 ppm) applied by both WF and DF were more effective at reducing L. innocua, from residual turkey slurry film than a traditional Cl sanitizer (200 ppm) on unwashed slicer surfaces.