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Effect of low-dose x-ray and e-beam irradiation on Escherichia coli O157:H7, non-O157 (VTEC) Escherichia coli and Salmonella viability on meat surfaces and sensory quality of meat

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dc.contributor.supervisor Holley, Rick (Food Science) en_US
dc.contributor.author Kundu, Devapriya
dc.date.accessioned 2013-01-28T18:00:09Z
dc.date.available 2013-01-28T18:00:09Z
dc.date.issued 2013-01-28
dc.identifier.uri http://hdl.handle.net/1993/15794
dc.description.abstract Radiation sensitivity of E. coli O157:H7, non-O157 VTEC and Salmonella to low-dose ionizing irradiation was evaluated. Buffer-suspended E. coli O157 and non-O157 VTEC strains showed similar resistance to 300 Gy X-ray treatments, while Salmonella strains were more resistant. A dose of 1 kGy E-beam radiation reduced two groups of non-O157 E. coli mixtures and one E. coli O157:H7 group inoculated in meat by at least 4 log CFU/g. Salmonella showed only a <2 log CFU/g reduction. Sensory attributes of cooked ground beef patties were not affected (p >0.05) by irradiation. However, irradiated raw carcass muscles were more brown (p < 0.05) but displayed less intense off-aroma (p < 0.05) compared to the control during storage. Therefore, a 1 kGy treatment has the potential to improve microbiological safety with minimal effects on sensory properties of beef; it would be a suitable method for treating carcass trim before preparing ground beef. en_US
dc.subject Irradiation en_US
dc.subject Verotoxigenic E. coli en_US
dc.subject Beef en_US
dc.subject Salmonella en_US
dc.title Effect of low-dose x-ray and e-beam irradiation on Escherichia coli O157:H7, non-O157 (VTEC) Escherichia coli and Salmonella viability on meat surfaces and sensory quality of meat en_US
dc.degree.discipline Food Science en_US
dc.contributor.examiningcommittee Arntfield, Susan (Food Science) Aliani, Michel (Human Nutritional Sciences) en_US
dc.degree.level Master of Science (M.Sc.) en_US
dc.description.note May 2013 en_US


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