Experimental Infection of Stressed and Unstressed Common Carp with Listeria monocytogenes

By Aleksandra Hristova Daskalova, Alexander Pavlov and Hristo Yordanov Daskalov.

Published by Food Studies: An Interdisciplinary Journal

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Article: Print $US10.00
Published online: July 9, 2015 $US5.00

Our study examined the persistence and ability of “Listeria monocytogenes” to penetrate the “sterile” tissues of live common carp in regard to the safety of fish as a potential source of this major zoonotic agent. Furthermore, the relation between stress, caused by moderate hypoxia, and the rate and duration of bacterial invasion was studied. To that end, two types of experimental infections were conducted and microbiological analyses were carried out. The results revealed that “Listeria monocytogenes” was able to invade the “sterile” tissues almost immediately after the infection. The pathogen showed survival of at least two weeks and if not eliminated during further processing, it could present a major risk for the human health. The oxygen deprivation did not seem to affect significantly the rate of the infection. This study could be a step for assessment of the importance of stress as a factor endangering the safety of fish as a product for human consumption.

Keywords: Listeria monocytogenes, Common Carp, Stress

Food Studies: An Interdisciplinary Journal, Volume 5, Issue 3, September 2015, pp.23-32. Article: Print (Spiral Bound). Published online: July 9, 2015 (Article: Electronic (PDF File; 501.830KB)).

Aleksandra Hristova Daskalova

PhD student, Department of Food Hygiene, Technology and Control, Faculty of Veterinary Medicine, Trakia University, Stara Zagora, Bulgaria

Prof. Alexander Pavlov

Professor, Head of the Deparment of Food Hygiene,Technology and Control, Faculty of Veterinay Medicine, Trakia University, Stara Zagora, Bulgaria

Prof. Hristo Yordanov Daskalov

Professor, Head of the National Centre of Food Safety, NDRVI, Bulgarian Food Safety Agency, Sofia, Bulgaria