Effect of combinations of high-pressure treatment and bacteriocin-producing lactic acid bacteria on the survival of Listeria monocytogenes in raw milk cheese
The combined effect of high-pressure (HP) treatment and bacteriocin-producing lactic acid bacteria (BP-LAB) on the survival of Listeria monocytogenes Scott A in cheeses made from raw milk that was inoculated with the pathogen at 4.80 log cfu mL-1, a commercial starter and one of seven strains of BP-LAB was investigated. On day 3, the counts of L. monocytogenes were 7.03 log cfu g-1 in a control cheese (without BP-LAB, not HP treated), 6.06-6.74 log cfu g-1 in cheeses with BP-LAB, 6.13 log cfu g-1 in a cheese without BP-LAB and treated on day 2 at 300 MPa, 2.01 log cfu g-1 in a cheese without BP-LAB and treated on day 2 at 500 MPa, 3.83-5.43 log cfu g-1 in cheeses with BP-LAB and treated on day 2 at 300 MPa, and 1.81 log cfu g-1 or less in cheeses with BP-LAB and treated on day 2 at 500 MPa. HP treatment was more effective on day 51 than on day 2. © 2005 Elsevier Ltd. All rights reserved.
| Main Authors: | , , , , |
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| Format: | conference object biblioteca |
| Language: | eng |
| Published: |
2005
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| Online Access: | http://hdl.handle.net/20.500.12792/1818 |
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| Summary: | The combined effect of high-pressure (HP) treatment and bacteriocin-producing lactic acid bacteria (BP-LAB) on the survival of Listeria monocytogenes Scott A in cheeses made from raw milk that was inoculated with the pathogen at 4.80 log cfu mL-1, a commercial starter and one of seven strains of BP-LAB was investigated. On day 3, the counts of L. monocytogenes were 7.03 log cfu g-1 in a control cheese (without BP-LAB, not HP treated), 6.06-6.74 log cfu g-1 in cheeses with BP-LAB, 6.13 log cfu g-1 in a cheese without BP-LAB and treated on day 2 at 300 MPa, 2.01 log cfu g-1 in a cheese without BP-LAB and treated on day 2 at 500 MPa, 3.83-5.43 log cfu g-1 in cheeses with BP-LAB and treated on day 2 at 300 MPa, and 1.81 log cfu g-1 or less in cheeses with BP-LAB and treated on day 2 at 500 MPa. HP treatment was more effective on day 51 than on day 2. © 2005 Elsevier Ltd. All rights reserved. |
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