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.authorKundu, Devapriya
dc.contributor.examiningcommitteeArntfield, Susan (Food Science) Aliani, Michel (Human Nutritional Sciences)en_US
dc.contributor.supervisorHolley, Rick (Food Science)en_US
dc.date.accessioned2013-01-28T18:00:09Z
dc.date.available2013-01-28T18:00:09Z
dc.date.issued2013-01-28
dc.degree.disciplineFood Scienceen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractRadiation 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.description.noteMay 2013en_US
dc.identifier.urihttp://hdl.handle.net/1993/15794
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectIrradiationen_US
dc.subjectVerotoxigenic E. colien_US
dc.subjectBeefen_US
dc.subjectSalmonellaen_US
dc.titleEffect 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 meaten_US
dc.typemaster thesisen_US
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