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Outbreak of listerosis due to imported cooked ham, Switzerland 2011.
Euro Surveill. 2013 May 02; 18(18):20469.ES

Abstract

From 24 April to 31 July 2011, nine cases of listeriosis were registered in the cantons of Aargau, Basel-Land and Zurich, Switzerland. In six of the cases, infection with Listeria monocytogenes was laboratory confirmed, while three remained suspected cases. The suspected cases were family members of confirmed cases with identical or similar symptoms. All confirmed cases were infected with a L. monocytogenes strain belonging to serovar 1/2a: all had an indistinguishable pulsotype by pulsed-field gel electrophoresis (PFGE). The same strain was detected in samples of cooked ham that were on sale from a particular retailer. Two samples of ham tested contained 470 and 4,800 colony-forming units (CFU) L. monocytogenes per gram respectively. Data of shopper cards from two confirmed cases could be evaluated: both cases had purchased the contaminated ham. The outbreak initiated a product recall and alert actions at national and European level, through the Rapid Alert System for Food and Feed (RASFF). Following the RASFF alert, the company producing the contaminated ham was inspected by the responsible authorities. Their investigations showed that the ham was not contaminated in the production plant, but in the premises of a company to which slicing and packing was outsourced.

Authors+Show Affiliations

National Centre for Enteropathogenic Bacteria and Listeria (NENT), Zurich, Switzerland.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23725774

Citation

Hächler, H, et al. "Outbreak of Listerosis Due to Imported Cooked Ham, Switzerland 2011." Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin, vol. 18, no. 18, 2013, p. 20469.
Hächler H, Marti G, Giannini P, et al. Outbreak of listerosis due to imported cooked ham, Switzerland 2011. Euro Surveill. 2013;18(18):20469.
Hächler, H., Marti, G., Giannini, P., Lehner, A., Jost, M., Beck, J., Weiss, F., Bally, B., Jermini, M., Stephan, R., & Baumgartner, A. (2013). Outbreak of listerosis due to imported cooked ham, Switzerland 2011. Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin, 18(18), 20469.
Hächler H, et al. Outbreak of Listerosis Due to Imported Cooked Ham, Switzerland 2011. Euro Surveill. 2013 May 2;18(18):20469. PubMed PMID: 23725774.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Outbreak of listerosis due to imported cooked ham, Switzerland 2011. AU - Hächler,H, AU - Marti,G, AU - Giannini,P, AU - Lehner,A, AU - Jost,M, AU - Beck,J, AU - Weiss,F, AU - Bally,B, AU - Jermini,M, AU - Stephan,R, AU - Baumgartner,A, Y1 - 2013/05/02/ PY - 2013/6/4/entrez PY - 2013/6/4/pubmed PY - 2014/3/7/medline SP - 20469 EP - 20469 JF - Euro surveillance : bulletin Europeen sur les maladies transmissibles = European communicable disease bulletin JO - Euro Surveill. VL - 18 IS - 18 N2 - From 24 April to 31 July 2011, nine cases of listeriosis were registered in the cantons of Aargau, Basel-Land and Zurich, Switzerland. In six of the cases, infection with Listeria monocytogenes was laboratory confirmed, while three remained suspected cases. The suspected cases were family members of confirmed cases with identical or similar symptoms. All confirmed cases were infected with a L. monocytogenes strain belonging to serovar 1/2a: all had an indistinguishable pulsotype by pulsed-field gel electrophoresis (PFGE). The same strain was detected in samples of cooked ham that were on sale from a particular retailer. Two samples of ham tested contained 470 and 4,800 colony-forming units (CFU) L. monocytogenes per gram respectively. Data of shopper cards from two confirmed cases could be evaluated: both cases had purchased the contaminated ham. The outbreak initiated a product recall and alert actions at national and European level, through the Rapid Alert System for Food and Feed (RASFF). Following the RASFF alert, the company producing the contaminated ham was inspected by the responsible authorities. Their investigations showed that the ham was not contaminated in the production plant, but in the premises of a company to which slicing and packing was outsourced. SN - 1560-7917 UR - https://www.unboundmedicine.com/medline/citation/23725774/Outbreak_of_listerosis_due_to_imported_cooked_ham,_Switzerland_2011 L2 - http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=20469 DB - PRIME DP - Unbound Medicine ER -