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Lessons from an outbreak of listeriosis related to vacuum-packed gravad and cold-smoked fish
Department of Food Hygiene , Faculty of Veterinary Medicine, SLU, Uppsala, Sweden.ORCID iD: 0000-0001-6903-5322
Department of Food Hygiene , Faculty of Veterinary Medicine, SLU, Uppsala, Sweden.
Department of Food Hygiene , Faculty of Veterinary Medicine, SLU, Uppsala, Sweden.
Department of Food Hygiene , Faculty of Veterinary Medicine, SLU, Uppsala, Sweden.
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2000 (English)In: International Journal of Food Microbiology, ISSN 0168-1605, E-ISSN 1879-3460, Vol. 62, no 3, p. 173-175Article in journal (Refereed) Published
Abstract [en]

The first lesson learned from this outbreak was that vacuum-packed rainbow trout is not only an excellent medium for the growth of Listeria monocytogenes, but may also cause human listeriosis. Another lesson is that one single fish processing plant may spread multiple clonal types of L. monocytogenes by selling contaminated products to consumers. Thus, when investigating fish-borne outbreaks of listeriosis one should identify and type several isolates of L. monocytogenes from each food and environmental sample, since multiple clonal types might be present. The outbreak described in this paper involved at least eight human cases, three clonal types of L. monocytogenes, and lasted for 11 months. During the outbreak investigation, L. monocytogenes was also isolated from another brand of rainbow trout found in the refrigerator of one of the patients. These latter isolates belonged to a clonal type not associated with the outbreak. However, this clonal type is of considerable interest since it has been associated with foodborne outbreaks of listeriosis in several countries, and is also the second most common clonal type among human clinical isolates of L. monocytogenes in Sweden. Besides the described outbreak, it is likely that vacuum-packed, cold-smoked and gravad rainbow trout have been involved in additional cases of foodborne listeriosis in Sweden.

Place, publisher, year, edition, pages
2000. Vol. 62, no 3, p. 173-175
Keywords [en]
Cold-smoked; Listeriosis; Rainbow trout; Yellow clone
National Category
Other Social Sciences not elsewhere specified
Research subject
Culinary Arts and Meal Science
Identifiers
URN: urn:nbn:se:oru:diva-43713DOI: 10.1016/S0168-1605(00)00332-9ISI: 000166144300002PubMedID: 11156259Scopus ID: 2-s2.0-0034695167OAI: oai:DiVA.org:oru-43713DiVA, id: diva2:795949
Available from: 2015-03-17 Created: 2015-03-17 Last updated: 2017-12-04Bibliographically approved

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Tham, WilhelmDanielsson-Tham, Marie-Louise

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