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    July 19, 2001 (Washington) -- Although no cases of mad cow disease or its human equivalent have ever been reported in the U.S., the government surveillance system to detect infected cattle is inadequate and varies widely from state to state, the consumer advocacy group Public Citizen charges in a new report.

    One method the U.S. Department of Agriculture has implemented to catch an outbreak of mad cow disease -- also known as bovine spongiform encephalopathy or BSE -- is to slaughter and autopsy the brains of cattle that display symptoms suggesting that they may have contracted the disease.

    This is important because it is believed that eating products made from cattle infected with the mysterious proteins that cause mad cow disease, called prions, can lead to the human equivalent of the disease called variant Creutzfeldt-Jakob disease, or vCJD, which leads to the degeneration of the brain.

    It is believed that an outbreak of mad cow disease in Europe that began in the 1980s has led to the infection of more than 100 people in that region, primarily in the U.K. At present, there is no cure for vCJD, and most of the Europeans inflicted with vCJD have already died.

    Public Citizen reviewed the USDA surveillance records in the U.S. and found "enormous variations in the BSE testing rates between states," which suggest "that the USDA's testing program is being administered in a haphazard fashion," the group says in their report.

    The states with the highest rates of testing had rates that were 400 to 2,000 times those of the lowest states. This makes the USDA's claim that no cows with mad cow disease have been detected in this country "not very compelling," Public Citizen says.

    Public Citizen wants the USDA to modify its surveillance system to reduce the variability between states and make the rate of testing more uniform, Peter Lurie, MD, deputy director of the organization's Health Research Group, tells WebMD. "You want to have the same likelihood of finding a positive cow no matter where it occurs."

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