Publicação
Zero-inflated regressions for modelling microbial low prevalence and sampling performance for foodborne pathogens
| Resumo: | Microbial contamination of raw poultry meat could occur because of improper handling at primary production and slaughterhouse levels. Low microbial prevalence data often consists of a high amount of non-detections (zero positives), so a flexible framework is required to characterise the underlying microbial distribution and conduct reliable inferential statistics. Thus, the objective of this work was to evaluate the performance of zeroinflated binomial (ZIB) regression models to describe the effects of sampling site (carcass, thigh, breast, wings) on the measured incidences of Salmonella, Listeria monocytogenes and Staphylococcus aureus on chicken meat. For this aim, a number of fixed- and random-effects models were evaluated and compared, while sampling performance based on mean prevalence estimates was assessed. |
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| Autores principais: | Gonzales-Barron, Ursula |
| Outros Autores: | Hernández, Marta; Rodríguez-Lázaro, David; Cadavez, Vasco; Valero, Antonio |
| Assunto: | Zero inflated binomial Poultry meat Markov chain MonteCarlo |
| Ano: | 2017 |
| País: | Portugal |
| Tipo de documento: | documento de conferência |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Instituto Politécnico de Bragança |
| Idioma: | inglês |
| Origem: | Biblioteca Digital do IPB |
| Resumo: | Microbial contamination of raw poultry meat could occur because of improper handling at primary production and slaughterhouse levels. Low microbial prevalence data often consists of a high amount of non-detections (zero positives), so a flexible framework is required to characterise the underlying microbial distribution and conduct reliable inferential statistics. Thus, the objective of this work was to evaluate the performance of zeroinflated binomial (ZIB) regression models to describe the effects of sampling site (carcass, thigh, breast, wings) on the measured incidences of Salmonella, Listeria monocytogenes and Staphylococcus aureus on chicken meat. For this aim, a number of fixed- and random-effects models were evaluated and compared, while sampling performance based on mean prevalence estimates was assessed. |
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