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oai:recercat.cat:20.500.12327/20372025-10-22T11:11:20Zcom_2072_4428com_2072_4427col_2072_487898

Evaluation of water-assisted UV-C light and its additive effect with peracetic acid for the inactivation of Listeria monocytogenes, Salmonella enterica and murine norovirus on whole and fresh-cut strawberries during shelf-life Ortiz-Solà, Jordi Valero Díaz, Antonio Abadias, Maribel Nicolau-Lapeña, Iolanda Viñas, Inmaculada Producció Vegetal Postcollita 663/664 BACKGROUND: The purpose of the present study was to examine the inactivation of Salmonella enterica (50 ∼L; 109 CFU g−1), Listeria monocytogenes (50 ∼L; 109 CFU g−1), and murine norovirus (MNV-1; 50 ∼L; 107 50% tissue culture infectious dose (TCID50) mL−1) on whole and fresh-cut strawberries after 2 min disinfection treatments (water (H2O), chlorine 200 mg L−1 (NaClO), water-assisted ultraviolet-C (UV-C) (WUV), and the combination WUV and 40 mg L−1 of PA (WUV + PA)) in a water tank (15 L) equipped with 4 UV-C lamps (17.2 W each), and after 7 days of cold storage (4 and 10 °C). For MNV-1, dry UV-C treatment (DUV) was also tested. For all UV-C treatments, an irradiation dose of 1.3 kJ m−2 was used. RESULTS: When strawberries were washed with WUV, L. monocytogenes and S. enterica were reduced by 2.8 and 2.2 log CFU g−1, respectively. The addition of 40 mg L−1 of PA to WUV (WUV + PA) increased the reduction range of L. monocytogenes and S. enterica by 1.9 and 0.8 log, respectively. Regarding the wash water, no pathogens were recovered after the WUV + PA treatment (detection limit 50 CFU mL−1). Depending on storage conditions (7 days at 4 or 10 °C), reductions observed were 0.5 to 2.0 log for S. enterica and 0.5 to 3.0 log for L. monocytogenes. The reductions in MNV-1 titer after disinfection treatments ranged from 1.3 to 1.7 log. No significant differences between storage conditions were observed for MNV-1: titers did not decline or were reduced up to 0.3 log after 7 days of cold storage. CONCLUSION: The three-way action for disinfecting strawberries by UV-C irradiation and PA, plus the physical removal of the microorganisms by agitated water, are effective against foodborne pathogens on strawberries and water wash. During storage, WUV had a larger impact on the inactivation kinetics of S. enterica. Storage had little impact on MNV-1 inactivation. info:eu-repo/semantics/publishedVersion 2022-04-04 info:eu-repo/semantics/article Jordi Ortiz-Solà, Antonio Valero, Maribel Abadias, Iolanda Nicolau-Lapena, Inmaculada Viñas. 2022. “Evaluation of water-assisted UV-C light and its additive effect with peracetic acid for the inactivation of Listeria monocytogenes, Salmonella enterica and murine norovirus on whole and fresh-cut strawberries during shelf-life”. Journal of the Science of Food and Agriculture 0022-5142 http://hdl.handle.net/20.500.12327/2037 https://doi.org/10.1002/jsfa.11913 eng Journal of The Science of Food and Agriculture MINECO/Programa Estatal de I+D+I orientada a los retos de la sociedad/AGL2016-78086-R/ES/ESTRATEGIAS DE MITIGACION DE LOS PROBLEMAS ASOCIADOS A PATOGENOS DE TRANSMISION ALIMENTARIA PARA MEJORAR LA CALIDAD E INOCUIDAD DE FRESAS CONGELADAS Y LISTAS PARA EL CONSUMO/FRESAFE Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 10 Wiley