Fecal shedding of various E. coli strains from six sheep inoculated with a cocktail containing five strains. STEC 86-24, STEC 3081, and ETEC 2041 were given at a dose of 107 CFU/strain/animal, and EPEC E2348/69 and ETEC 637 were given at 1010 CFU/strain/animal (treatment 2). Lines represent the means for each strain. (A) Strains STEC 86-24 and STEC 3081; (B) strains ETEC 2041, ETEC 637, and EPEC E2348/69.