UV-Heat Treatments for the Control of Foodborne Microbial Pathogens in Chicken Broth

Gouma, M. ; Gayán, E. ; Raso, J. (Universidad de Zaragoza) ; Condón, S. (Universidad de Zaragoza) ; Álvarez, I. (Universidad de Zaragoza)

Resumen: This investigation established the process criteria for using UV-C light and mild heat (UV-H treatment) to inactivate 5-Log10 cycles (performance criterion) of common foodborne pathogen populations, Escherichia coli, Salmonella Typhimurium, Listeria monocytogenes, and Staphylococcus aureus, when inoculated in chicken broth. To define the target microorganism and the proper UV-H treatment conditions (including UV dose, treatment time, and temperature) that would achieve the stated performance criterion, mathematical equations based on Geeraerd''s model were developed for each microorganism. For the sake of comparison, inactivation equations for heat treatments were also performed on the same chicken broth and for the same microorganisms. L. monocytogenes was the most UV-H resistant microorganism at all temperatures, requiring a UV dose between 6.10 J/mL (5.6 min) and 2.26 J/mL (2.09 min) to achieve 5-Log10 reductions. In comparison with UV treatments at room temperatures, the combination of UV and mild heat allowed both the UV dose and treatment time to be reduced by 30% and 63% at 55°C and 60°C, respectively. Compared to heat treatments, the UV-H process reduced the heating time for 5-Log10 reductions of all the investigated microorganisms in chicken broth from 20-fold to 2-fold when the operating temperature varied from 53 to 60°C.

Idioma: Inglés

DOI: 10.1155/2015/436030

Año: 2015

Publicado en: BioMed Research International 2015 (2015), 436030[12 pp]
ISSN: 2314-6133

Factor impacto JCR: 2.134 (2015)

Categ. JCR: MEDICINE, RESEARCH & EXPERIMENTAL rank: 72 / 124 = 0.581 (2015) - Q3 - T2
Categ. JCR: BIOTECHNOLOGY & APPLIED MICROBIOLOGY rank: 81 / 161 = 0.503 (2015) - Q3 - T2

Factor impacto SCIMAGO: 0.854 - Biochemistry, Genetics and Molecular Biology (miscellaneous) (Q2) - Medicine (miscellaneous) (Q2) - Immunology and Microbiology (miscellaneous) (Q2)

Financiación: info:eu-repo/grantAgreement/ES/CICYT-FEDER/CIT-020000-2009-40
Financiación: info:eu-repo/grantAgreement/ES/MINECO/AGL2012-33522

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Tecnología de Alimentos (Dpto. Produc.Animal Cienc.Ali.)