Document Detail

Transfer of foodborne pathogens during mechanical slicing and their inactivation by levulinic acid-based sanitizer on slicers.
MedLine Citation:
PMID:  24290650     Owner:  NLM     Status:  In-Data-Review    
This study investigated the degree of cross-contamination between deli foods and slicers by Listeria monocytogenes, Salmonella, and Escherichia coli O157:H7, and their inactivation by levulinic acid (LA) plus sodium dodecyl sulfate (SDS) on slicers. The transfer rate of pathogens at 5 locations on the contaminated slicers (scenario I) and on food slices (scenario II) was determined. The antimicrobial efficacy of the LA + SDS sanitizers applied either as a liquid or as foam at three concentrations (0.5% LA + 0.05% SDS, 1% LA + 0.1% SDS, and 2% LA + 0.5% SDS) was determined for decontamination of the pathogens on the slicers at 21 °C. After slicing 10 slices, the pathogens recovered from slicer blades were significantly (P < 0.05) less than the recovery from some other contact locations (scenario I). With an initial inoculum at approximately 8.5 log CFU/blade, the populations of the pathogens transferred from blades to slices decreased logarithmically (R(2) > 0.9, scenario II). Contaminated slicer surfaces sprayed with 1% LA plus 0.1% SDS as a foam (45-55 psi) reduced within 1 min 6.0 to 8.0 log CFU/blade of the pathogens. Results revealed that cross-contamination can occur between deli foods and slicers. Also, LA-based sanitizer applied as foam can be a useful treatment to remove microbial contamination on the slicers.
Dong Chen; Tong Zhao; Michael P Doyle
Publication Detail:
Type:  Journal Article     Date:  2013-10-16
Journal Detail:
Title:  Food microbiology     Volume:  38     ISSN:  1095-9998     ISO Abbreviation:  Food Microbiol.     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2013-12-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8601127     Medline TA:  Food Microbiol     Country:  England    
Other Details:
Languages:  eng     Pagination:  263-9     Citation Subset:  IM    
Copyright Information:
Copyright © 2013 Elsevier Ltd. All rights reserved.
Center for Food Safety, College of Agricultural and Environmental Sciences, University of Georgia, 1109 Experiment Street, Griffin, GA 30223, USA.
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