request for food pathogenic strains

[mangiae at esvx23.es.dupont.com]

I am looking for pathogenic strains (primarily Listeria, E.coli, Staphylococcus, and Salmonella) for a research project.  I am interested in strains from a
wide variety of sources.  I am mostly interested in free strains but may be able to pay.  If you would be willing to provide me with any  strains or know of a source, please contact me at e-mail address below.  

Thank you,
Liz
mangiae at esvax.dnet.dupont.com
302-695-3010