While not specific about plans to handle when food borne illnesses strike, this does provide some useful information about the various illnesses, symptoms, causes, etc.
www.in.gov/isdh/regsvcs/foodprot/emergency_response/er_index.htm

Also, this provides information about security planning as well as other useful links.
[url=http://www.in.gov/isdh/regsvcs/foodprot/security/index.htm[/URL]]www.in.gov/isdh/regsvcs/foodprot/security/index.htm[/URL][/url]