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Survival of foodborne pathogens on commercially packed table grapes under simulated refrigerated transit conditions
- Carter, Michelle Qiu, Feng, Doris, Chapman, Mary H., Gabler, Franka
- Food microbiology 2018 v.72 pp. 199-205
- Escherichia coli O157, Listeria monocytogenes, Salmonella enterica, bags, food pathogens, polyethylene, polystyrenes, table grapes, temperature
- We examined the survival of Listeria monocytogenes, Escherichia coli O157:H7, and Salmonella enterica Thompson inoculated on commercially packed table grapes under simulated refrigerated transit conditions (1.1 ± 0.5 °C; 90% RH). Grapes were placed in perforated polyethylene cluster bags, within a commercial expanded polystyrene box equipped with either a SO2-generating pad; a perforated polyethylene box liner; a SO2-generating pad and a box liner; or none of them. L. monocytogenes was most sensitive to SO2-generating pad. SO2-generating pad or SO2-generating pad with box liner inactivated this pathogen completely on day 12 following the inoculation. S. enterica Thompson displayed a similar cold sensitivity as L. monocytogenes, but was more resistant to SO2-generating pad than L. monocytogenes. While SO2-generating pad eliminated S. enterica Thompson on day 20, a combination of box liner with SO2-generating pad inactivated this pathogen completely on day 13. E. coli O157:H7 had the highest tolerance to transit temperature and to SO2-generating pad; SO2-generating pad inactivated this pathogen completely on Day 20. Our data suggest that use of SO2-generating pad combined with box liner is effective in reducing foodborne pathogens L. monocytogenes and S. enterica Thompson, while the use of SO2-generating pad alone was more effective on E. coli O157:H7.