The behavior of Listeria monocytogenes (10 Scott A cells per g) in cold-process (smoked) salmon containing 3, 5, or 6% water-phase NaCl was evaluated during 30 to 40 d storage at 5 or 10°C in either oxygen-permeable film or vacuum-sealed impermeable film. At 10°C, L. monocytogenes grew to 106 to 108 CFU/g by the second week, with no differences attributed to NaCl concentration except for an initial lag in the 6% NaCl samples. Vacuum packaging suppressed growth of L. monocytogenes by 10- to 100-fold in samples with 3 or 5% NaCl. Inhibition related to NaCl concentration was most apparent at 5°C and L. monocytogenes populations were held below 102 CFU/g by 6% NaCl. Growth of a 327 CFU/g inoculum was about 10-fold greater than a 10 CFU/g inoculum at 10°C and 100-fold greater at 5°C. Growth of two strains isolated from naturally contaminated, commercially prepared, cold-smoked fish did not differ from Scott A. The use of sugar in the product did not influence growth of L. monocytogenes. Maximum populations of aerobic microorganisms reached at 5 and 10°C were similar, although the rate of growth was somewhat delayed at 5°C, and some inhibition was shown by 5 and 6% NaCl and by vacuum packaging.
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Research Article|
November 01 1993
Parameters for Control of Listeria monocytogenes in Smoked Fishery Products: Sodium Chloride and Packaging Method
MARK E. PETERSON;
MARK E. PETERSON
National Marine Fisheries Service, Northwest Fisheries Science Center, Utilization Research Division, U.S. Dept. of Commerce, NOAA, 2725 Montlake Boulevard East, Seattle, Washington 98112
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GRETCHEN A. PELROY;
GRETCHEN A. PELROY
National Marine Fisheries Service, Northwest Fisheries Science Center, Utilization Research Division, U.S. Dept. of Commerce, NOAA, 2725 Montlake Boulevard East, Seattle, Washington 98112
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ROHINEE N. PARANJPYE;
ROHINEE N. PARANJPYE
National Marine Fisheries Service, Northwest Fisheries Science Center, Utilization Research Division, U.S. Dept. of Commerce, NOAA, 2725 Montlake Boulevard East, Seattle, Washington 98112
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FRANK T. POYSKY;
FRANK T. POYSKY
National Marine Fisheries Service, Northwest Fisheries Science Center, Utilization Research Division, U.S. Dept. of Commerce, NOAA, 2725 Montlake Boulevard East, Seattle, Washington 98112
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JAMIE S. ALMOND;
JAMIE S. ALMOND
National Marine Fisheries Service, Northwest Fisheries Science Center, Utilization Research Division, U.S. Dept. of Commerce, NOAA, 2725 Montlake Boulevard East, Seattle, Washington 98112
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MEL W. EKLUND
MEL W. EKLUND
National Marine Fisheries Service, Northwest Fisheries Science Center, Utilization Research Division, U.S. Dept. of Commerce, NOAA, 2725 Montlake Boulevard East, Seattle, Washington 98112
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J Food Prot (1993) 56 (11): 938–943.
Article history
Received:
April 20 1993
Citation
MARK E. PETERSON, GRETCHEN A. PELROY, ROHINEE N. PARANJPYE, FRANK T. POYSKY, JAMIE S. ALMOND, MEL W. EKLUND; Parameters for Control of Listeria monocytogenes in Smoked Fishery Products: Sodium Chloride and Packaging Method. J Food Prot 1 November 1993; 56 (11): 938–943. doi: https://doi.org/10.4315/0362-028X-56.11.938
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