Modeling the inactivation of Salmonella typhimurium, Listeria monocytogenes, and Salmonella enteritidis on poultry products exposed to pulsed UV-light

Nene M. Keklik, Ali Demirci, Virendra Puri, Paul Heinz Heinemann

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Inactivation of Salmonella Typhimurium on unpackaged and vacuum-packaged chicken breast, Listeria monocytogenes on unpackaged and vacuum-packaged chicken frankfurters, and Salmonella Enteritidis on egg shells via pulsed UV-light were explained by log-linear and Weibull models using inactivation data from previous studies. This study demonstrated that the survival curves of S. Typhimurium and L. monocytogenes were non-linear exhibiting concavity, and the Weibull model was more successful than the log-linear model in estimating the inactivation for all poultry products evaluated, except for S. Enteritidis on shell-eggs, for which the survival curve was sigmoidal rather than concave, and the use of the Weibull model resulted in slightly better fit than the log-linear model. The goodness-of-fit of the Weibull model parameters produced RMSEs of 0.06-0.82, % RMSEs of 3.1-21.2, determination coefficients of 0.75-0.99, and slopes of 0.84-0.95. Overall, this study suggests that the survival curves of pathogens on poultry products exposed to pulsed UV-light are non-linear, and the Weibull model can generally be a useful tool to describe the inactivation patterns for pathogenic microorganisms affiliated with poultry products.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011, ASABE 2011
PublisherAmerican Society of Agricultural and Biological Engineers
Pages4639-4653
Number of pages15
Volume6
ISBN (Print)9781618391568
StatePublished - 2011
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011 - Louisville, KY, United States
Duration: Aug 7 2011Aug 10 2011

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2011
CountryUnited States
CityLouisville, KY
Period8/7/118/10/11

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science

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