The spoilage flora of vacuum-packaged, sodium nitrite or potassium nitrate treated, cold-smoked rainbow trout stored at 4°C or 8°C

Show full item record



Permalink

Citation

International journal of food microbiology. 1998. 45(2): 135-142.

Title: The spoilage flora of vacuum-packaged, sodium nitrite or potassium nitrate treated, cold-smoked rainbow trout stored at 4°C or 8°C
Author: Lyhs, Ulrike; Björkroth, Johanna; Hyytiä, Eija; Korkeala, Hannu
Publisher: Elsevier
Date: 1998
Language: en
Number of pages: 128456 bytes
ISSN: 0168-1605
URI: http://dx.doi.org/10.1016/S0168-1605(98)00160-3
http://hdl.handle.net/1975/535
Abstract: The spoilage flora of vacuum-packaged, salted, cold-smoked rainbow trout fillets, with or without the addition of nitrate or nitrite, stored at 4°C and 8°C, was studied. Of 620 isolates, lactic acid bacteria were the major fraction (76%), predominating in all samples of spoiled product. However, the phenotypical tests used were insufficient to identify the lactic acid bacteria to the species level. Gram-positive, catalase-positive cocci, Gram-negative, oxidase-negative rods and Gram-negative, oxidase-positive rods were found in 6%, 16% and 2% of the samples, respectively. Of 39 Gram-positive, catalase-positive cocci, 29 were identified as staphylococci and 10 as micrococci. Eighty-five isolates were found to belong to the family Enterobacteriaceae, with 45 of those being Serratia plymuthica. Eleven isolates from the nitrate treated samples stored at 8°C were identified as Pseudomonas aeruginosa. The occurrence of P. aeruginosa and staphylococci in the nitrate-containing samples, stored at 8°C, may cause problems with respect to the safety of the product. The types of lactic acid and other bacteria in the spoilage flora were generally reduced by the addition of nitrate or nitrite to fillets.
Description: http://www.elsevier.nl/locate/01681605
Subject: fish
spoilage
vacuum-packaging
cold-smoking
nitrite
nitrate
NaCl


Files in this item

Total number of downloads: Loading...

Files Size Format View
Lyhs_etal_IJFM1998.pdf 125.4Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record