Use of nisin-coated plastic films to control Listeria monocytogenes on vacuum-packaged cold-smoked salmon.

Use of nisin-coated plastic films to control Listeria monocytogenes on vacuum-packaged cold-smoked salmon. Research Abstract Details 

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Use of nisin-coated plastic films to control Listeria monocytogenes on vacuum-packaged cold-smoked salmon. Abstract Text:

Hudaa Neetoo,Mu Ye,Haiqiang Chen,Rolf D Joerger,Doris T Hicks,Dallas G Hoover,Hudaa Neetoo,Mu Ye,Haiqiang Chen,Rolf D Joerger,Doris T Hicks,Dallas G Hoover,

Cold-smoked (Salmo salar) salmon samples were surface-inoculated with a cocktail of three nisin-resistant strains of L. monocytogenes (PSU1, PSU2 and PSU21) to a level of approximately 5x10(2) or 5x10(5) CFU/cm(2) of salmon surface. The inoculated smoked salmon samples were vacuum-packaged with control film (no nisin) or nisin-coated plastic films and stored at either 4 or 10 degrees C. When the inoculated smoked salmon samples were packaged with film coated with 2000 IU/cm(2) of nisin, a reduction of 3.9 log CFU/cm(2) (compared with control) was achieved at either temperature for samples inoculated with 5x10(2) CFU/cm(2) of L. monocytogenes after 56 (4 degrees C) and 49 (10 degrees C) days of storage while reductions of 2.4 and 0.7 log CFU/cm(2) were achieved for samples inoculated with a high level of L. monocytogenes (5x10(5) CFU/cm(2)) after 58 (4 degrees C) and 43 (10 degrees C) days, respectively. For samples packaged in film coated with 500 IU/cm(2) of nisin, reductions of 0.5 and 1.7 log CFU/cm(2) were achieved for samples inoculated with a low level of L. monocytogenes (5x10(2) CFU/cm(2)) after 56 (4 degrees C) and 49 (10 degrees C) days of storage while reductions of 1.8 and 0.8 log CFU/cm(2) were achieved for samples inoculated with high level of L. monocytogenes after 58(4 degrees C) and 43 (10 degrees C) days, respectively. In addition, nisin inhibited the proliferation of background microbiota on smoked salmon in a concentration-dependent manner at both storage temperatures although the bacteriostatic effect was more pronounced at refrigeration temperature. This work highlights the potential for incorporating nisin into plastic films for enhancing the microbial safety of smoked salmon as well as controlling its microbial spoilage.

Use of nisin-coated plastic films to control Listeria monocytogenes on vacuum-packaged cold-smoked salmon. Publishing Authors By Initials

H Neetoo,M Ye,H Chen,RD Joerger,DT Hicks,DG Hoover,H Neetoo,M Ye,H Chen,RD Joerger,DT Hicks,DG Hoover,

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Use of nisin-coated plastic films to control Listeria monocytogenes on vacuum-packaged cold-smoked salmon. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: International journal of food microbiology

VOLUME: 122

Page Numbers: 8-15

Journal Abbreviation: Int. J. Food Microbiol.

ISSN: 0168-1605

DAY: 21

MONTH: 11

YEAR: 2007

Use of nisin-coated plastic films to control Listeria monocytogenes on vacuum-packaged cold-smoked salmon. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Use of nisin-coated plastic films to control Listeria monocytogenes on vacuum-packaged cold-smoked salmon.

AFFILIATION: Department of Animal & Food Sciences, University of Delaware, Newark, DE 19716-2150, United States.

Country: Netherlands

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MEDLINETA: Int J Food Microbiol

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