Cargill Testing E. Coli Vaccine About 100,000 cattle will be vaccinated. Published on: Jan 6, 2010 Tweet Post to Your Wall. Email Story RSS Permalink Print Cargill is testing at least one of two forms of a vaccine that might reduce the spread of E. coli 0157:H7 in cattle intestines. The availability of the vaccine was announced last month by USDA's Agricultural Research Service. Which one of two forms is being tested has not been announced. Company spokesman Mark Klein told the Lincoln, Nebraska Journal Star that about 100,000 cattle will receive the vaccine. They are expected to go to slaughter in the May through September period at Fort Morgan, Colo. About a dozen feedlots near Fort Morgan are involved in the testing. One of those feedlot operators believes cattle vaccination needs to become an industry-wide practice for it to have a meaningful effect on food safety. Then there is the question of how the cost of cattle vaccines gets integrated into the business proposition from producers to consumers.