Modelling the interaction of the sakacin-producing Lactobacillus sakei CTC494 and Listeria monocytogenes in filleted gilthead sea bream (Sparus aurata) under modified atmosphere packaging at isothermal and non-isothermal conditions
Ver/Abrir
Autor/a
Costa, Jean Carlos Correia Peres
Bover-Cid, Sara
Bolívar, Araceli
Zurera, Gonzalo
Pérez-Rodríguez, Fernando
Fecha de publicación
2019-03-06ISSN
0168-1605
Resumen
The objective of this work was to quantitatively evaluate the effect of Lactobacillus sakei CTC494 (sakacin-producing bioprotective strain) against Listeria monocytogenes in fish juice and to apply and validate three microbial interaction models (Jameson, modified Jameson and Lotka Volterra models) through challenge tests with gilthead sea bream (Sparus aurata) fillets under modified atmosphere packaging stored at isothermal and non-isothermal conditions. L. sakei CTC494 inhibited L. monocytogenes growth when simultaneously present in the matrix (fish juice and fish fillets) at different inoculation ratios pathogen:bioprotector (i.e. 1:1, 1:2 and 1:3). The higher the inoculation ratio, the stronger the inhibition of L. monocytogenes growth, with the ratio 1:3 yielding no growth of the pathogen. The maximum population density (Nmax) was the most affected parameter for L. monocytogenes at all inoculation ratios. According to the microbiological and sensory analysis outcomes, an initial inoculation level of 4 log cfu/g for L. sakei CTC494 would be a suitable bioprotective strategy without compromising the sensory quality of the fish product. The performance of the tested interaction models was evaluated using the Acceptable Simulation Zone approach. The Lotka Volterra model showed slightly better fit than the Jameson-based models with 75–92% out of the observed counts falling into the Acceptable Simulation Zone, indicating a satisfactory model performance. The evaluated interaction models could be used as predictive modelling tool to simulate the simultaneous behaviour of bacteriocin-producing Lactobacillus strains and L. monocytogenes; thus, supporting the design and optimization of bioprotective culture-based strategies against L. monocytogenes in minimally processed fish products.
Tipo de documento
Artículo
Versión del documento
Versión aceptada
Lengua
English
Materias (CDU)
663/664 - Alimentos y nutrición. Enología. Aceites. Grasas
Páginas
57
Publicado por
Elsevier
Publicado en
International Journal of Food Microbiology
Citación
Costa, Jean Carlos Correia Peres, Sara Bover-Cid, Araceli Bolívar, Gonzalo Zurera, and Fernando Pérez-Rodríguez. 2019. "Modelling The Interaction Of The Sakacin-Producing Lactobacillus Sakei CTC494 And Listeria Monocytogenes In Filleted Gilthead Sea Bream (Sparus Aurata) Under Modified Atmosphere Packaging At Isothermal And Non-Isothermal Conditions". International Journal Of Food Microbiology 297: 72-84. Elsevier BV. doi:10.1016/j.ijfoodmicro.2019.03.002.
Program
Funcionalitat i Seguretat Alimentària
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