US meat giant ConAgra Foods is at the centre of the second largest ground beef recall in the US after recalling nearly 19 million pounds on the suspicion that it is contaminated with the deadly E. coli 0157:H7 bacteria. The news expands a previous recall announced by ConAgra at the end of last month. At least 22 people have fallen ill after eating the contaminated beef, and they are mostly in Colorado. The meat was produced at the company's Greeley, Colorado, plant between 12 April and 11 July, according to the US Department of Agriculture (USDA).