Natural antimicrobials and high-pressure treatments on the inactivation of Salmonella Enteritidis and Escherichia coli O157H7 in cold-smoked salmon
BACKGROUND High hydrostatic pressure (HHP) combined with reuterin and lactoperoxidase system (LPS) has exerted antimicrobial activity against Listeria monocytogenes in cold-smoked salmon at chilled temperatures. Therefore the purpose of this work was to evaluate the effect of HHP combined with reuterin, LPS and lactoferrin (LF) on the survival of Salmonella enterica subsp. enterica serovar Enteritidis and Escherichia coli O157H7 in cold-smoked salmon stored at 4 and 10°C. RESULTS Salmonella Enteritidis and E. coli O157H7 were reduced more than 3 log colony-forming units (CFU) g-1 by the pressure treatment (450 MPa/5min). LPS slightly diminished pathogen levels throughout storage, whereas no effect was recorded when reuterin or LF was added. The Salmonella population was below the detection limit (<1 log CFU g-1) during the storage of HHP-treated smoked salmon at 4 and 10°C. The antimicrobial activity of HHP against E. coli O157H7 was increased when 450 MPa was applied in combination with LPS in cold-smoked salmon at 4 and 10°C. CONCLUSION HHP at 450 MPa/5min inactivated S. Enteritidis in cold-smoked salmon and in combination with LPS would be useful as a hurdle technology approach against E. coli O157H7, even under mild temperature abuse conditions. © 2015 Society of Chemical Industry.
| Main Authors: | , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Wiley
2016
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| Subjects: | Salmonella Enteritidis, Escherichia coli O157:H7, Antimicrobials, High pressure, Cold-smoked salmon, |
| Online Access: | http://hdl.handle.net/20.500.12792/2960 http://hdl.handle.net/10261/289952 |
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