The USDA has confirmed a case of mad cow disease in a dairy cow near Fresno. This is just the fourth case of mad cow disease found in the U.S. since the disease first appeared in the country in 2003. Agriculture officials say meat-eaters are not at risk because it's an atypical case -- the infected cow was not intended for the food supply and the disease cannot be transmitted by milk. But consumer advocates say there are many questions yet to be answered.
Mad Cow Disease Found in California
Michael K. Hansen, senior scientist at Consumer's Union, the non-profit publisher of Consumer Reports
Tom Talbot, chairman of the Animal Health and Well Being Committee at the National Cattlemen's Beef Association, veterinarian and California beef producer
Jere Dick, veterinarian and associate deputy administrator with USDA Veterinary Services