After three children living in Napa County, California, became ill with E. coli food poisoning after eating hamburgers, Richwood Meat Company voluntarily recalled 107,943 pounds of frozen ground beef.

The three food poisoning cases were reported on April 3 and 4. The children had eaten the hamburgers at two Little League concession stands. California health officials have identified E. coli in tested samples of recalled hamburgers.

The recalled hamburgers and other frozen ground beef products were distributed in Arizona, California, Idaho, Oregon and Washington under the brand names Fireriver, Chef’s Pride, Ritz Food, Blackwood Farms, California Pacific Associates, C&C Distributing, Golbon and Richwood.

Consumers are urged to dispose of any ground beef products that are subject to recall. These products contain the establishment number EST. 8264 and a date code of 118-6 or 4/28/06.

Initial symptoms of E.coli O157:H7 infection include severe abdominal cramps and watery diarrhea. The diarrhea may become bloody and can lead to dehydration. Sometimes there are no symptoms at all. There is usually little or no fever.