All beef products made at ConAgra's meat plant in Colorado will be tested by food safety inspectors until the company can prove it can prevent E. coli contamination. A US Agriculture Department official said that the checks will remain in place until ConAgra con demonstrate it has sufficient safeguards to prevent contamination, reports Reuters. The precautions follow the country's second largest ever beef recall, when nearly 19 million pounds of ground beef were recalled after 28 people across seven states fell ill after eating beef contaminated with E. coli.