Yersinia enterocolitica is a Gram-negative pathogen¹ that can cause foodborne disease.  A publication by Scallan et al.² in 2011 estimated that 97,656 human foodborne Yersiniosis cases, including 29 deaths, occur annually in the US.

Key laboratories studying various aspects of foodborne Yersiniosis in the US and Canada include:

Key laboratories studying various aspects of foodborne Yersiniosis in Europe include:

Key laboratories studying various aspects of foodborne Yersiniosis in South and Latin America include:

Key laboratories studying various aspects of foodborne Yersiniosis in Asia and Australia include:

Additional resources on V. parahaemolyticus:
A number of key sources on V. parahaemolyticus are available. 

 References
¹http://en.wikipedia.org/wiki/Vibrio_parahaemolyticus
²Scallan et al. 2011.Emerging Infectious Diseases 17:7-15  PMID:21192848

Yersiniosis outbreaks are often associated with consumption of pork, as the pig is the only animal consumed by humans which regularly harbours the pathogenic serovars O:3 and O:9.¹

Recent Yersinia enterocolitica outbreaks and news: 

Yersinia enterocolitica O:9 infections associated with bagged salad mix in Norway, February to April 2011
12.may.11
Eurosurveillance, Volume 16, Issue 19
E MacDonald, B T Heier, T Stalheim, K S Cudjoe, T Skjerdal, A Wester, B A Lindstedt, L Vold
http://www.eurosurveillance.org/ViewArticle.aspx?ArticleId=19866

References:

\^1^Norwegian Scientific Committee for Food Safety. Panel on Biological Hazards. A preliminary risk assessment of Yersinia enterocolitica in the food chain: some aspects related to human health in Norway. 04/103. \[Accessed 5 May 2011\] Available from: [http://www.vkm.no/dav/d165b9d426.pdf|http://www.vkm.no/dav/d165b9d426.pdf]