Group A Streptococcus is a Gram-positive¹ foodborne pathogen that can cause foodborne disease. A publication by Scallan et al.² in 2011 estimated that 1 human foodborne listeriosis cases, including 0 deaths, occur annually in the US.

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

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

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

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

Additional resources on Listeria monocytogenes:
A number of key sources on Clostridium botulinum and botulism are available. 

 References
¹http://en.wikipedia.org/wiki/Listeria_monocytogenes - steve replace with approproiate wikipedia refereces for each pathogen
²Scallan et al. 2011.Emerging Infectious Diseases 17:7-15  PMID:21192848