UV-C Radiation as a Factor Reducing Microbiological Contamination of Fish MealReport as inadecuate




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The Scientific World Journal - Volume 2014 2014, Article ID 928094, 8 pages -

Research Article

Department of Microbiology, Faculty of Pharmacy, Nicolaus Copernicus University, Collegium Medicum of L. Rydygier, 9 M. Skłodowskiej-Curie Street, 85-094 Bydgoszcz, Poland

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

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

Received 30 August 2013; Accepted 28 October 2013; Published 21 January 2014

Academic Editors: P. Jones and A. Joshi

Copyright © 2014 Krzysztof Skowron et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Fish meals, added to feeds as a source of protein, may contain pathogenic bacteria. Therefore, effective methods for their sanitizing, such as UV-C radiation, are needed to minimize the epidemiological risk. The objective of this study was to evaluate the effect of UV-C radiation on the sanitary state of fish meals. The research materials included salmon and cod meals. Samples of the fish meals were inoculated with suspensions of Salmonella, E. coli, enterococci, and C. sporogenes spores and exposed to the following surface UV-C fluencies: 0–400 J·m

for bacteria and 0–5000 J·m

for spores. For the vegetative forms, the highest theoretical lethal UV-C dose, ranging from 670.99 to 688.36 J·m

depending on the meal type, was determined for Salmonella. The lowest UV-C fluency of 363.34–363.95 J·m

was needed for the inactivation of Enterococcus spp. Spores were considerably more resistant, and the UV-C doses necessary for inactivation were 159571.1 J·m

in salmon meal and 66836.9 J·m

in cod meal. The application of UV-C radiation for the sanitization of fish meals proved to be a relatively effective method for vegetative forms of bacteria but was practically ineffective for spores.





Author: Krzysztof Skowron, Justyna Bauza-Kaszewska, Zbigniew Dobrzański, Zbigniew Paluszak, and Karolina Jadwiga Skowron

Source: https://www.hindawi.com/



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