| Important Vectors for Listeria monocytogenes Transmission at Farm Dairies Manufacturing Fresh Sheep and Goat Cheese from Raw Milk. | |
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MedLine Citation:
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PMID: 21669068 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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The aim of this study was to determine the transmission routs of Listeria spp. in dairy farms manufacturing fresh cheese made from ovine and caprine raw milk and to evaluate the impact of Listeria monocytogenes mastitis on raw milk contamination. Overall, 5,799 samples, including 835 environmental samples, 230 milk and milk product samples, and 4,734 aseptic half-udder foremilk samples were collected from 53 dairy farms in the dairy intensive area of Lower Austria. Farms were selected for the study because raw milk was processed to cheese that was sold directly to consumers. A total of 153 samples were positive for Listeria spp., yielding an overall prevalence of 2.6%; L. monocytogenes was found in 0.9% of the samples. Bulk tank milk, cheese, and half-udder samples were negative for Listeria spp. Because none of the sheep and goats tested positive from udder samples, L. monocytogenes mastitis was excluded as a significant source of raw milk contamination. L. monocytogenes was detected at 30.2% of all inspected farms. Swab samples from working boots and fecal samples had a significantly higher overall prevalence (P < 0.001) of L. monocytogenes (15.7 and 13.0%, respectively) than did swab samples from the milk processing environment (7.9%). A significant correlation was found between the prevalence of L. monocytogenes in the animal and in the milk processing environment and the silage feeding practices. Isolation of L. monocytogenes was three to seven times more likely from farms where silage was fed to animals throughout the year than from farms where silage was not fed to the animals. |
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Authors:
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Dagmar Schoder; Daniela Melzner; Alois Schmalwieser; Abdoulla Zangana; Petra Winter; Martin Wagner |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of food protection Volume: 74 ISSN: 1944-9097 ISO Abbreviation: J. Food Prot. Publication Date: 2011 Jun |
Date Detail:
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Created Date: 2011-06-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7703944 Medline TA: J Food Prot Country: United States |
Other Details:
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Languages: eng Pagination: 919-24 Citation Subset: IM |
Affiliation:
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Institute of Milk Hygiene, Milk Technology and Food Science, Veterinary Medical University of Vienna, Veterinärplatz 1, 1210 Vienna, Austria. dagmar.schoder@vetmeduni.ac.at. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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