Outbreak of Yersinia enterocolitica serogroup O:9 infection and processed pork, Norway.

ABSTRACT
- An outbreak involving 11 persons infected with Yersinia enterocolitica O:9 was investigated in Norway in February 2006. A case-control study and microbiologic investigation indicated a ready-to-eat pork product as the probable source. Appropriate control measures are needed to address consumer risk associated with this product.

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