EJPAU 2005. Malicki A. , Brużewicz S. , Molenda J. EFFECT OF LACTIC AND ASCORBIC ACID ON THE SURVIVAL OF LISTERIA MONOCYTOGENES IN VACUUM-PACKED BEEF

Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

2005
Volume 8
Issue 3

Topic:

Veterinary Medicine

ELECTRONIC
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES

Malicki A. , Brużewicz S. , Molenda J. 2005. EFFECT OF LACTIC AND ASCORBIC ACID ON THE SURVIVAL OF LISTERIA MONOCYTOGENES IN VACUUM-PACKED BEEF, EJPAU 8(3), #37.
Available Online: http://www.ejpau.media.pl/volume8/issue3/abs-37.html

EFFECT OF LACTIC AND ASCORBIC ACID ON THE SURVIVAL OF LISTERIA MONOCYTOGENES IN VACUUM-PACKED BEEF

Adam Malicki¹, Szymon Brużewicz², Jerzy Molenda¹
¹ Department of Food Hygiene and Consumer Safety, Agricultural University of Wrocław, Poland
² Institute of Social Problems of Health and Education, Warsaw School of Social Psychology, Poland

ABSTRACT

The purpose of present study was to evaluate the efficiency of certain organic acids against L. monocytogenes contaminating vacuum-packed meat stored under refrigeration. The experiment was performed on 140 samples of bovine omotransversarius muscle. Each sample was divided into 4 parts (L, A, M, C) and inoculated with L. monocytogenes PCM 2191. Subsequently the parts were superficially sprayed with 10% lactic (L) or 10% ascorbic acid (A) or the mixture of both the acids (M) or left as the control (C). All the samples were vacuum-packed and stored at 4±1°C for 14 days. The pH and water activity measurements and the microbiological analyses of the material studied were performed on 0, 1, 7 and 14 day of storage. The study proved the efficiency of superficially applied lactic and ascorbic acid against L. monocytogenes. The acids, used either individually or in mixture, caused the significant reduction of listeria at any point of storage. The efficiency of the acids was the most prominent after their application in mixture, which was proved by the calculated values of T-4D - time required for the reduction of L. monocytogenes by 4 log. The T-4D for both the acids applied together was more than twice shorter than for each of them used individually. Consequently, superficial treatment with the mixture of lactic and ascorbic acid seems to be efficient against the moderate contamination of beef with L. monocytogenes.

Key words: Listeria monocytogenes, organic acids, beef.

Adam Malicki
Department of Food Hygiene and Consumer Safety,
Agricultural University of Wrocław, Poland
C.K. Norwida 31, 50-375 Wrocław, Poland
tel. (0-71) 320 53 99
email: malicki@ozi.ar.wroc.pl

Szymon Brużewicz
Institute of Social Problems of Health and Education,
Warsaw School of Social Psychology, Poland

Jerzy Molenda
Department of Food Hygiene and Consumer Safety,
Agricultural University of Wrocław, Poland
C.K. Norwida 31, 50-375 Wrocław, Poland

Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.