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Veterinary Research Forum، جلد ۱۰، شماره ۳، صفحات ۱۹۳-۱۹۸
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عنوان انگلیسی Efficacy of lyophilized cell-free supernatant of <i>Lactobacillus salivarius</i> (Ls-BU2) on <i>Escherichia coli</i> and shelf life of ground beef
چکیده انگلیسی مقاله In the present study, the effect of different concentrations of cell-free supernatant (CFS; 10.00 and 35.00 mg g-1) of Lactobacillus salivarius (Ls-BU2) on chemical, microbial and sensorial specifications of ground beef stored under the refrigerated condition was investigated. The antibacterial activity of CFS on Escherichia coli was also assessed. According to agar-disk diffusion method, CFS of Ls-BU2 revealed a promising antibacterial activity against E. coli in culture media compared to CFS of a well-known probiotic (L. acidophilus LA-5). In meat, CFS of Ls-BU2 showed a minimal effective concentration (MEC) of 35.00 mg g-1 on E. coli, while CFS of L. acidophilus represented a MEC of > 45.00 mg g-1. The CFS of Ls-BU2 at 35.00 mg g-1 concentration retained psychrophilic counts of meat at a lower value than maximum accepted level (7 log10 CFU g-1). In a similar trend, CFS of Ls-BU2 at 35.00 mg g-1 concentration was also displayed high sensorial scores compared to other CFS-treated samples. In conclusion, we demonstrated that CFS of Ls-BU2 and to some extent CFS of L. acidophilus could act as a safe food additive for the control of bacterial pathogens and to extend the shelf life of ground beef.
کلیدواژه‌های انگلیسی مقاله Antimicrobial activity, Lactic acid bacteria, Minced meat, Minimal effective concentration, Shelf life
نویسندگان مقاله Mehran Moradi |
Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran

Hossein Tajik |
Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran

Karim Mardani |
Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran

Parya Ezati |
Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran

نشانی اینترنتی http://vrf.iranjournals.ir/article_35915_ea2713f431ae787a7b8b67f8adf364a9.pdf
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