<abstract xmlns="http://www.w3.org/1999/xhtml"><p>This study was aimed at testing the effect of microwave radiation on survival of E. <italic>coli, Salmonella</italic> Enteritidis, <italic>Enterococcus</italic> spp. and <italic>Clostridium</italic> spores in two kinds of fish meals. The material used in the study consisted of samples of two kinds of fish meal – salmon and cod. In the experiment samples of both kinds of fish meals were inoculated with suspensions of tested bacteria and spores of <italic>Clostridum sporogenes</italic>. After inoculation the material was exposed to microwave radiation with a frequency of 2.45 ghz and microwave energy power of 0, 100, 180, 300, 450, 600 and 700 w, respectively, for 2.5 min for bacteria and 11 minutes for spores. then the reisolated microorganisms were counted and theoretical lethal doses of radiation were determined. among the studied vegetative forms of bacteria, the largest decreases in the numbers at the same radiation dose were observed in the rods of <italic>E. coli</italic>, whereas the smallest in enterococci. spores of <italic>Clostridium sporogenes</italic> showed a considerably higher resistance to the effect of that factor. the power of dose resulting in the complete inactivation of the studied bacteria should be about 430 kJ×g–1, and in the case of spores – 1 900 kJ×g–1.</p></abstract>

This study was aimed at testing the effect of microwave radiation on survival of E. coli, Salmonella Enteritidis, Enterococcus spp. and Clostridium spores in two kinds of fish meals. The material used in the study consisted of samples of two kinds of fish meal – salmon and cod. In the experiment samples of both kinds of fish meals were inoculated with suspensions of tested bacteria and spores of Clostridum sporogenes. After inoculation the material was exposed to microwave radiation with a frequency of 2.45 ghz and microwave energy power of 0, 100, 180, 300, 450, 600 and 700 w, respectively, for 2.5 min for bacteria and 11 minutes for spores. then the reisolated microorganisms were counted and theoretical lethal doses of radiation were determined. among the studied vegetative forms of bacteria, the largest decreases in the numbers at the same radiation dose were observed in the rods of E. coli, whereas the smallest in enterococci. spores of Clostridium sporogenes showed a considerably higher resistance to the effect of that factor. the power of dose resulting in the complete inactivation of the studied bacteria should be about 430 kJ×g–1, and in the case of spores – 1 900 kJ×g–1.

Effect of Microwave Radiation on Microorganisms in Fish Meals

Department of Microbiology and Food Technology, University of Technology and Life Sciences, Bernardyńska 6-8, 85-029 Bydgoszcz, Poland

Department of Microbiology, Nicolaus Copernicus University in Toruń, Ludwik Rydygier Collegium Medicum in Bydgoszcz, M. Skłodowskiej-Curie 9, 85-094 Bydgoszcz, Poland

Department of Environment Hygiene and Animal Welfare, Wroclaw University of Environmental and Life Sciences, Chełmońskiego 38C, 51-630 Wrocław, Poland

Institute of Telecommunications and Computer Science, University of Technology and Life Sciences in Bydgoszcz, Kaliskiego 7, 85-796 Bydgoszcz, Poland

Annals of Animal Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Effect of Microwave Radiation on Microorganisms in Fish Meals"}

This study was aimed at testing the effect of microwave radiation on survival of E. coli, Salmonella Enteritidis, Enterococcus spp. and Clostridium spores in...

Effect of Microwave Radiation on Microorganisms in Fish Meals

Pubblicato online: 29 lug 2014

Pagine: 623 - 636

Ricevuto: 04 ago 2013

Accettato: 26 nov 2013

DOI: https://doi.org/10.2478/aoas-2014-0020

Parole chiave
microwave radiation, inactivation of bacteria, spores, fish meals

© 2014 Justyna Bauza-Kaszewska et. al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Effect of Microwave Radiation on Microorganisms in Fish Meals

Pubblicato online: 29 lug 2014

Pagine: 623 - 636

Ricevuto: 04 ago 2013

Accettato: 26 nov 2013

DOI: https://doi.org/10.2478/aoas-2014-0020

Parole chiavemicrowave radiation, inactivation of bacteria, spores, fish meals

© 2014 Justyna Bauza-Kaszewska et. al.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Parole chiave
microwave radiation, inactivation of bacteria, spores, fish meals