title: Survival of Listeria monocytogenes and Salmonella Enteritidis in sea bream (Sparus aurata) fillets packaged under enriched CO2 modified atmospheres.
abstract: The effect of packaging of fresh sea bream fillets under different modified atmospheres (high levels of CO2 combined with N2) on the behaviour of Listeria monocytogenes and Salmonella Enteritidis was studied. Two different strains of each pathogen were spread over the sea bream fillets stored at either 0 °C or 4 °C for 16 days under standard supermarket lighting conditions (14 h a day). The atmospheres investigated were 60% CO2/40% N2, 70% CO2/30% N2, 80% CO2/20% N2 and air as control. Mesophilic, psychrotrophic and Enterobacteriaceae microbial counts were also performed in control batches. The results indicate that all the CO2 concentrations used favoured the control of pathogen bacteria inoculated, when compared with air conditions especially, when combined with storage at 0 °C. Both storage temperature (0 °C and 4 °C) resulted in a decrease in Salmonella count. The results were more significant for Listeria strains, because during the storage at 4 °C Listeria count increased in all batches, while for samples stored at 0 °C a significant reduction in microbial load except in control batch was observed. Sensitivity differences of inoculated strains against temperature and CO2 concentrations were also discussed.
authors: Department of Animal Production and Food Science, Laboratory of Science and Technology of Meat and Fish, Faculty of Veterinary Sciences, University of Zaragoza, Miguel Servet 177, 50013 Zaragoza, Spain.
authors: Laura
authors: L
authors: Provincial
authors: Elena
authors: E
authors: Guillén
authors: Mario
authors: M
authors: Gil
authors: Verónica
authors: V
authors: Alonso
authors: Pedro
authors: P
authors: Roncalés
authors: Jose A
authors: JA
authors: Beltrán
mesh_terms: D000388:Air; D000818:Animals; D002245:Carbon Dioxide / Q000032:analysis; D003080:Cold Temperature; D004781:Environmental Exposure / Q000032:analysis; D018857:Food Packaging / Q000379:methods*; D061353:Food Storage / Q000379:methods*; D008089:Listeria monocytogenes / Q000302:isolation & purification*; D009584:Nitrogen / Q000032:analysis; D012477:Salmonella enteritidis / Q000302:isolation & purification*; D021541:Sea Bream / Q000382:microbiology*
chemical_list: D002245:Carbon Dioxide; D009584:Nitrogen