US meat firm Quality Boneless Beef Co, which does business as Quality Meats and Seafood, is voluntarily expanding a recall to include approximately 659,000 pounds of fresh and frozen ground beef products that may be contaminated with E. coli bacteria.

The US Department of Agriculture's Food Safety and Inspection Service said that the North Dakota-based company had recently recalled approximately 332,000 pounds of fresh and frozen ground beef products because of possible E. coli contamination.

The products subject to recall bear the establishment code "EST. 2063" inside the USDA mark of inspection. The products were produced before 1 August, and distributed to restaurants, institutions and grocery stores in Minnesota, Montana, North Dakota, South Dakota and Wisconsin.

The recall was initiated because an epidemiological investigation suggested that the recalled product may be linked to one E.coli O157:H7 illness in North Dakota.

E. coli is a potentially deadly bacteria that can cause severe diarrhoea and dehydration. Children, the elderly and people with weak immune systems are most vulnerable to getting ill from the bacteria.

For more information on the recall, click here.