updated 9/27/2007 7:16:30 PM ET 2007-09-27T23:16:30

Federal food inspectors are investigating the Topps Meat Co. facility and its suppliers amid reports that at least 21 people in eight states may have fallen ill after eating bacteria-tainted hamburgers, officials said Thursday.

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The U.S. Department of Agriculture is looking into what controls the Elizabeth-based company has in place to protect against E. coli, agency spokeswoman Amanda Eamich said.

She declined to comment further, saying only that the investigation was ongoing.

A spokeswoman for Topps, the leading U.S. maker of frozen burger patties, didn’t immediately respond to a request for comment.

Health officials found tainted burgers in a New York home, and on Tuesday, Topps voluntarily recalled nearly 332,000 pounds of frozen ground beef products that may be contaminated with E. coli.

E. coli causes intestinal illness that generally clears up within a week for adults but can be deadly for the very young, the elderly and people with compromised immune systems. Symptoms can include severe stomach cramps, bloody diarrhea and, in extreme cases, kidney failure.

The Centers for Disease Control and Prevention said Wednesday that 21 people in eight states may have fallen ill after eating the hamburgers. Illnesses were reported in Connecticut, Florida, Indiana, Maine, New Jersey, New York, Ohio and Pennsylvania.

CDC spokeswoman Lola Russell said she had no new information Thursday.

A full list of the recalled products is available at http://www.toppsmeat.com.

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