Organic beef recalled last week after a test sample showed it was tainted with e. coli was sold at stores in 20 states and Washington, D.C. including some Costco, Harris Teeter and Price Chopper stores, said the U.S. Department of Agriculture.

The USDA's Food Safety and Inspection Service released a list of retailers today that carried the Nature's Harvest beef products recalled by First Class Foods Inc. The California company pulled about 34,373 pounds of ground beef and beef patties off shelves last week. So far, there have been no reports of consumers sickened from eating the beef.Included in the retail list are:

• Some Costco stores in California and Hawaii
• All Fresh and Easy stores in Arizona, California and Nevada
• Some Gelsons stores in California
• All Harris Teeter stores in North Carolina, South Carolina, Tennessee, Delaware, Florida, Georgia, Virginia and Washington, D.C.
• All Price Chopper stores in Vermont, Pennsylvania, New York Maryland and Connecticut
• Some Shoprite stores in New Jersey and Pennsylvania
• All Wakefern franchises -- PriceRite and ShopRite -- in New Jersey, New York, Connecticut and Pennsylvania.

The USDA list said the beef was also shipped to various stores in Illinois, Minnesota, Washington and Wisconsin. The USDA cautioned consumers to check the packaging on the beef to see if it is among the recalled meat because the store list could contain locations that didn't get any of the meat affected by the recall.

According to the U.S. Centers for Disease Control and Prevention, e. coli can cause severe stomach cramps, diarrhea and vomiting and potentially life threatening infections in more severe cases.