Yersinia enterocolitica O:9 infections associated with bagged salad mix in Norway, February to April 2011

E MacDonald; B T Heier; T Stalheim; K S Cudjoe; T Skjerdal; A Wester; B A Lindstedt; L Vold

doi:10.2807/ese.16.19.19866-en

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Yersinia enterocolitica O:9 infections associated with bagged salad mix in Norway, February to April 2011
E MacDonald¹ , B T Heier¹ , T Stalheim² , K S Cudjoe³ , T Skjerdal³ , A Wester¹ , B A Lindstedt¹ , L Vold¹
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Affiliations: ¹ Norwegian Institute of Public Health (Nasjonalt Folkehelseinstitutt), Oslo, Norway ² Norwegian Food Safety Authority (Mattilsynet), Oslo, Norway ³ Norwegian Veterinary Institute (Veterinærinstituttet), Oslo, Norway

Correspondence:
E MacDonald
emily.macdonald fhi.no
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Citation style for this article: MacDonald E, Heier B T, Stalheim T, Cudjoe K S, Skjerdal T, Wester A, Lindstedt B A, Vold L. Yersinia enterocolitica O:9 infections associated with bagged salad mix in Norway, February to April 2011. Euro Surveill. 2011;16(19):pii=19866. https://doi.org/10.2807/ese.16.19.19866-en Received: 06 May 2011

Abstract

In March 2011, the Norwegian Institute of Public Health identified a possible outbreak involving 21 cases of Yersinia enterocolitica O:9 infection with similar MLVA-profiles. Preliminary results of epidemiological and microbiological investigations indicate bagged salad mix containing radicchio rosso (also known as Italian chicory) as a possible source. As a result of the investigation, bagged salad mixes of a specific brand were voluntarily withdrawn from the market by the producer.