Neogen Corporation Neogen's test kits include those for: foodborne bacteria including E. coli O157:H7; naturally-occurring toxins; sulfites and histamine; food allergens; pesticide and drug residues; and for general sanitation.
Gastoenteric Disease Center Diagnostic serotyping, fimbrial, and toxin characterization of E. coli. Monoclonal antibody and fimbrial test kits also available. This site also contains extensive links to news items concerning E. coli.