title: Yersinia enterocolitica O:9 infections associated with bagged salad mix in Norway, February to April 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 As a result of the investigation, bagged salad mixes of a specific brand were voluntarily withdrawn from the market by the producer.
authors: Norwegian Institute of Public Health (Nasjonalt Folkehelseinstitutt), Oslo, Norway. emily.macdonald@fhi.no
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authors: MacDonald
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authors: Heier
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authors: Stalheim
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authors: Cudjoe
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authors: Skjerdal
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authors: Wester
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authors: Lindstedt
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