Inactivation of Escherichia coli, Salmonella enterica serovar Typhimurium, and Bacillus cereus in roasted grain powder by radio frequency heating.
RGP
UV-C radiation
food-borne pathogens
hurdle technology
radio-frequency heating
spore germination
Journal
Journal of applied microbiology
ISSN: 1365-2672
Titre abrégé: J Appl Microbiol
Pays: England
ID NLM: 9706280
Informations de publication
Date de publication:
Nov 2020
Nov 2020
Historique:
received:
09
04
2020
revised:
30
04
2020
accepted:
09
05
2020
pubmed:
18
5
2020
medline:
28
11
2020
entrez:
18
5
2020
Statut:
ppublish
Résumé
The objective of this study was to evaluate the antimicrobial effects of radio frequency (RF) heating and the combination treatment of RF heating with ultraviolet (UV) radiation against foodborne pathogens in roasted grain powder (RGP). Foodborne pathogens inoculated on RGP were subjected to RF heating or RF-UV combination treatments. After 120 s of RF heating, 4·68, 3·89 and 4·54 log reductions were observed for Escherichia coli, Salmonella Typhimurium and Bacillus cereus vegetative cells respectively. The combined RF-UV treatment showed synergistic effects of over 1 log unit compared to the sum of individual treatment for E. coli and S. Typhimurium, but not for B. cereus vegetative cells because of their high UV resistance. Germinated B. cereus cells were not significantly inactivated by RF heating (<1 log CFU per gram), and increased heat resistance compared to the vegetative cells was verified with mild heat treatment. The colour of RGP was not significantly affected by the RF or RF-UV treatments. Applying RF heating to grain-based food products has advantages for the inactivation of E. coli and S. Typhimurium in RGP. The results of the present study could be used as a basis for determining the treatment conditions for inactivating E. coli and other foodborne pathogens such as S. Typhimurium and B. cereus in RGP.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1227-1237Subventions
Organisme : Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries
ID : 710012-03-1-HD220
Organisme : National Research Foundation of Korea
ID : NRF-2019R1G1A1094005
Informations de copyright
© 2020 The Society for Applied Microbiology.
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