The strains of E. coli O157:H7 were 1 (Beef isolate), 5 (human isolate), 932 (human isolate), E009 (Beef isolate) and E0122 (cattle isolate) and S. Typhimurium strains included H2662 (cattle isolate), 11942A (cattle isolate), 13068A (cattle isolate), 152N17-1 (dairy isolate) and H3279 (human isolate).