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Título : Comparative Study on the Inactivation and Photoreactivation Response of Listeria monocytogenes Seafood Isolates and a Listeria innocua Surrogate after Pulsed Light Treatment
Autor : Lasagabaster, Amaia; Martinez de Maranon, Inigo
Citación : FOOD AND BIOPROCESS TECHNOLOGY, 2017, 10, 1931-1935
Resumen : The inactivation and photoreactivation response of six seafood-isolated Listeria monocytogenes and one Listeria innocua strain after pulsed light (PL) treatment was evaluated. The lower inactivation levels found after exposure of treated samples to daylight during the first 90 min of storage confirmed that both L. innocua and L. monocytogenes have the capability to photorepair PL-induced DNA damage upon appropriate conditions. Photoreactivation levels from 0.2 to 2.1 log CFU cm(-2) were observed depending on treatment intensity (fluence) and Listeria strain. Complete photorepair of PL-caused damage was not found even after treatments inducing low inactivation levels. Photoreactivation increased up to 2.1 log with the applied fluence up to a threshold able to cause between 2.4 and 5.4 log reductions under dark storage. Photorepair was not avoided but lower photoreactivation was observed after higher fluence inducing more than 6 log reductions under dark storage. Both L. innocua and L. monocytogenes serotype 1/2b exhibited the highest photoreactivation levels whereas serotypes 1/2a showed the lowest ones. The overall inactivation and photoreactivation responses of tested Listeria strains were comparable indicating that L. innocua may be a good surrogate for the safe evaluation, optimization and validation of PL technology to control L. monocytogenes in food products and food processing facilities.
Palabras clave : Intense pulsed light; UV; Decontamination; Preservation; Disinfection; DNA photorepair; MICROORGANISMS; TECHNOLOGY; TEMPERATURE; IMPACT; DAMAGE; UV
Fecha de publicación : 2017
Editorial : SPRINGER
Tipo de documento: Article
Idioma: Inglés
DOI: 10.1007/s11947-017-1972-6
URI : http://dspace.azti.es/handle/24689/426
ISSN : 1935-5130
E-ISSN: 1935-5149
Patrocinador: EU Commission [FOOD-CT-2004-506359]
Department of Agriculture, Fisheries and Food from the Basque Government
Spanish Ministry for Education and Science [FIT-060000-2004-285]
Aparece en las tipos de publicación: Artículos científicos



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