A Quantitative Process Model for Salmonella Enteritidis in Shell Eggs

Authors

  • R.C. Whiting,

    1. Author Whiting is with CFSAN, FDA, 200 C St., S.W., Washington D.C. 20204. Authors Hogue and Baker are with USDA FSIS in Washington D.C. Authors Schlosser and Ebel are USDA FSIS in College Station, Tex., and Fort Collins, Colo., respectively. Author Morales is with the Research Triangle Institute, Research Triangle Park, N.C. Author McDowell is with USDA APHIS, Riverdale, Md. Portions of this risk assessment were conducted while Whiting was with USDA, ARS, Wyndmoor, Pa., while Schlosser was with USDA, FSIS, Ft. Collins, Colo., Ebel was with USDA, APHIS, Boise, Idaho, and Morales was with North Carolina State University, Raleigh, N.C. and VAMD Regional College Veterinary Medicine, University of Maryland, College Park, Md. Correspond with Richard C. Whiting (E-mail: rcw@cfsan.fda.gov).
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  • A. Hogue,

    1. Author Whiting is with CFSAN, FDA, 200 C St., S.W., Washington D.C. 20204. Authors Hogue and Baker are with USDA FSIS in Washington D.C. Authors Schlosser and Ebel are USDA FSIS in College Station, Tex., and Fort Collins, Colo., respectively. Author Morales is with the Research Triangle Institute, Research Triangle Park, N.C. Author McDowell is with USDA APHIS, Riverdale, Md. Portions of this risk assessment were conducted while Whiting was with USDA, ARS, Wyndmoor, Pa., while Schlosser was with USDA, FSIS, Ft. Collins, Colo., Ebel was with USDA, APHIS, Boise, Idaho, and Morales was with North Carolina State University, Raleigh, N.C. and VAMD Regional College Veterinary Medicine, University of Maryland, College Park, Md. Correspond with Richard C. Whiting (E-mail: rcw@cfsan.fda.gov).
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  • W.D. Schlosser,

    1. Author Whiting is with CFSAN, FDA, 200 C St., S.W., Washington D.C. 20204. Authors Hogue and Baker are with USDA FSIS in Washington D.C. Authors Schlosser and Ebel are USDA FSIS in College Station, Tex., and Fort Collins, Colo., respectively. Author Morales is with the Research Triangle Institute, Research Triangle Park, N.C. Author McDowell is with USDA APHIS, Riverdale, Md. Portions of this risk assessment were conducted while Whiting was with USDA, ARS, Wyndmoor, Pa., while Schlosser was with USDA, FSIS, Ft. Collins, Colo., Ebel was with USDA, APHIS, Boise, Idaho, and Morales was with North Carolina State University, Raleigh, N.C. and VAMD Regional College Veterinary Medicine, University of Maryland, College Park, Md. Correspond with Richard C. Whiting (E-mail: rcw@cfsan.fda.gov).
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  • E.D. Ebel,

    1. Author Whiting is with CFSAN, FDA, 200 C St., S.W., Washington D.C. 20204. Authors Hogue and Baker are with USDA FSIS in Washington D.C. Authors Schlosser and Ebel are USDA FSIS in College Station, Tex., and Fort Collins, Colo., respectively. Author Morales is with the Research Triangle Institute, Research Triangle Park, N.C. Author McDowell is with USDA APHIS, Riverdale, Md. Portions of this risk assessment were conducted while Whiting was with USDA, ARS, Wyndmoor, Pa., while Schlosser was with USDA, FSIS, Ft. Collins, Colo., Ebel was with USDA, APHIS, Boise, Idaho, and Morales was with North Carolina State University, Raleigh, N.C. and VAMD Regional College Veterinary Medicine, University of Maryland, College Park, Md. Correspond with Richard C. Whiting (E-mail: rcw@cfsan.fda.gov).
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  • R.A. Morales,

    1. Author Whiting is with CFSAN, FDA, 200 C St., S.W., Washington D.C. 20204. Authors Hogue and Baker are with USDA FSIS in Washington D.C. Authors Schlosser and Ebel are USDA FSIS in College Station, Tex., and Fort Collins, Colo., respectively. Author Morales is with the Research Triangle Institute, Research Triangle Park, N.C. Author McDowell is with USDA APHIS, Riverdale, Md. Portions of this risk assessment were conducted while Whiting was with USDA, ARS, Wyndmoor, Pa., while Schlosser was with USDA, FSIS, Ft. Collins, Colo., Ebel was with USDA, APHIS, Boise, Idaho, and Morales was with North Carolina State University, Raleigh, N.C. and VAMD Regional College Veterinary Medicine, University of Maryland, College Park, Md. Correspond with Richard C. Whiting (E-mail: rcw@cfsan.fda.gov).
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  • A. Baker,

    1. Author Whiting is with CFSAN, FDA, 200 C St., S.W., Washington D.C. 20204. Authors Hogue and Baker are with USDA FSIS in Washington D.C. Authors Schlosser and Ebel are USDA FSIS in College Station, Tex., and Fort Collins, Colo., respectively. Author Morales is with the Research Triangle Institute, Research Triangle Park, N.C. Author McDowell is with USDA APHIS, Riverdale, Md. Portions of this risk assessment were conducted while Whiting was with USDA, ARS, Wyndmoor, Pa., while Schlosser was with USDA, FSIS, Ft. Collins, Colo., Ebel was with USDA, APHIS, Boise, Idaho, and Morales was with North Carolina State University, Raleigh, N.C. and VAMD Regional College Veterinary Medicine, University of Maryland, College Park, Md. Correspond with Richard C. Whiting (E-mail: rcw@cfsan.fda.gov).
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  • R.M. McDowell

    1. Author Whiting is with CFSAN, FDA, 200 C St., S.W., Washington D.C. 20204. Authors Hogue and Baker are with USDA FSIS in Washington D.C. Authors Schlosser and Ebel are USDA FSIS in College Station, Tex., and Fort Collins, Colo., respectively. Author Morales is with the Research Triangle Institute, Research Triangle Park, N.C. Author McDowell is with USDA APHIS, Riverdale, Md. Portions of this risk assessment were conducted while Whiting was with USDA, ARS, Wyndmoor, Pa., while Schlosser was with USDA, FSIS, Ft. Collins, Colo., Ebel was with USDA, APHIS, Boise, Idaho, and Morales was with North Carolina State University, Raleigh, N.C. and VAMD Regional College Veterinary Medicine, University of Maryland, College Park, Md. Correspond with Richard C. Whiting (E-mail: rcw@cfsan.fda.gov).
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ABSTRACT

A stochastic model estimating growth of Salmonella Enteritidis during egg collection, processing, storage, and transportation is described. The model contains equations for internal egg temperature, yolk membrane integrity, and exponential growth rate of S. Enteritidis. Monte Carlo simulations determined that no growth was likely to occur during the average 4.5 d of the egg's progression from lay through transportation. However, various time-temperature combinations affected the subsequent abuse an egg can withstand before S. Enteritidis growth begins. Scenarios demonstrated the relative importance of ambient air temperature and indicated the greatest safety improvements in this phase for shell eggs would result from preventing unrefrigerated storage or hastening cooling immediately after lay.

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