Dairy cows feed from a trough in Chino, California, April 25, 2012. On reporting the discovery of a California dairy cow infected with Bovine Spongiform Encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. . REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH) 

Dairy cows feed in Chino, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

A dairy cow works her head out of a feed trough in Chino, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

Dairy cows walk in to produce milk in Chino, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

A dairy cow calls out in Chino, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

Dairy cows feed from a trough in Chino, California April 25, 2012.On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

A dairy cow works peers out from behind a fence in Chino, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

A dairy cow works peers out from behind a fence in Chino, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

Dairy cows stand in their pen in Chino, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

A dairy cow peers out from behind a fence in Chino, California, April 25, 2012. On reporting the discovery of a California dairy cow infected with Bovine Spongiform Encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH) 

Dairy cows feed in Chino, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH BUSINESS) 

Dairy cows wait to be milked in Chino, California, April 25, 2012. On reporting the discovery of a California dairy cow infected with Bovine Spongiform Encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Alex Gallardo (UNITED STATES - Tags: ANIMALS AGRICULTURE HEALTH) 

A dairy cow is seen grazing in Woodland Hills, a suburb of Los Angeles, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Gus Ruelas (UNITED STATES - Tags: AGRICULTURE ANIMALS HEALTH BUSINESS) 

A dairy cow (C) is seen grazing in Woodland Hills, a suburb of Los Angeles, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Gus Ruelas (UNITED STATES - Tags: AGRICULTURE ANIMALS HEALTH BUSINESS) 

A dairy cow (L) is seen grazing in Woodland Hills, a suburb of Los Angeles, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Gus Ruelas (UNITED STATES - Tags: AGRICULTURE ANIMALS HEALTH BUSINESS) 

Cattle graze in Woodland Hills, a suburb of Los Angeles, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Gus Ruelas (UNITED STATES - Tags: AGRICULTURE ANIMALS HEALTH BUSINESS) 

A dairy cow is seen grazing in Woodland Hills, a suburb of Los Angeles, California April 25, 2012. On reporting the discovery of a California dairy cow infected with bovine spongiform encephalopathy (BSE) on Tuesday, U.S. authorities quickly told consumers and importers around the world there was no danger the meat would enter the food chain. REUTERS/Gus Ruelas (UNITED STATES - Tags: AGRICULTURE ANIMALS HEALTH BUSINESS) 

Police buses block protesters' march to the presidential Blue House and the U.S. embassy, during a rally to demand the full-scale renegotiation of a U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in Seoul July 5, 2008. Polls show that most South Koreans oppose a U.S. beef import deal Lee struck in April to open the market to U.S. beef but about two-thirds of respondents say it is also time to halt the rallies that have grown more violent in recent weeks. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Christian pastors from the Korea National Council of Churches (KNCC) participate in a service during a protest to demand a full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in central Seoul July 3, 2008. South Korea has seen street protests on nearly a nightly basis since early May. What began as candle-lit rallies voicing concerns about mad cow disease infection from U.S. beef soon became a lightning rod for criticism of Lee. REUTERS/Lee Jae-Won (SOUTH KOREA) 

Catholic priests and nuns (C) lead a protest march demanding a full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in central Seoul June 30, 2008. South Korean police said on Monday they have detained more than 100 people for violence at weekend rallies, which was held by people fearing mad cow disease. REUTERS/Lee Jae-Won (SOUTH KOREA) 

Riot police holding their shields move to suppress protesters during a demonstration demanding the full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in Seoul June 28, 2008. Militant protesters blocked trucks from leaving warehouses for a second day on Friday as South Korea resumed quarantine checks on U.S. beef imports, moving to bring the product to market for the first time in nine months. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Riot policemen sleep on a road as protesters hold an overnight demonstration against the U.S. beef import deal on the road leading to the presidential Blue House and the U.S. embassy in Seoul June 27, 2008. South Korea allowed the resumption of U.S. beef imports starting Thursday, the farm ministry said, implementing an unpopular deal that sparked street protests held by people fearing infection of mad cow disease and caused a crisis for the government. REUTERS/Lee Jae-Won (SOUTH KOREA) 

Anti-government protesters (R) and riot police take a rest during a overnight rally demanding the full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in Seoul June 26, 2008. South Korea will allow the resumption of U.S. beef imports starting Thursday, the ruling party said on Wednesday, implementing an unpopular deal that sparked street protests and caused a crisis for the government. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Riot police officers sleep on a street during a rally demanding the full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in Seoul June 26, 2008. South Korea will allow the resumption of U.S. beef imports starting Thursday, the ruling party said on Wednesday, implementing an unpopular deal that sparked street protests and caused a crisis for the government. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

A police officer is surrounded by protesters during a rally demanding the full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in Seoul June 26, 2008. South Korea will allow the resumption of U.S. beef imports starting Thursday, the ruling party said on Wednesday, implementing an unpopular deal that sparked street protests and caused a crisis for the government. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Protesters struggle with riot police during a rally demanding the full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in Seoul June 25, 2008. South Korea will allow the resumption of U.S. beef imports starting Thursday, the ruling party said on Wednesday, implementing an unpopular deal that sparked street protests and caused a crisis for the government. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Demonstrators take part in a rally demanding the full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak in Seoul June 25, 2008. South Korea will allow the resumption of U.S. beef imports starting Thursday, the ruling party said on Wednesday, implementing an unpopular deal that sparked street protests and caused a crisis for the government. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Lee Jung-hee, a lawmaker of the Democratic Labor Party (DLP), shouts in a police bus after she was apprehended by police during a rally demanding the full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak near the presidential Blue House in Seoul June 25, 2008. South Korea will allow the resumption of U.S. beef imports starting Thursday, the ruling party said on Wednesday, implementing an unpopular deal that sparked street protests and caused a crisis for the government. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

A protester is apprehended by police during a rally demanding the full-scale renegotiation of the U.S. beef import deal and the resignation of South Korean President Lee Myung-bak near the presidential Blue House in Seoul June 25, 2008. South Korea will allow the resumption of U.S. beef imports starting Thursday, the ruling party said on Wednesday, implementing an unpopular deal that sparked street protests and caused a crisis for the government. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Protesters cover their faces as riot police use fire extinguishers to block them during a rally demanding a full-scale renegotiation of the beef deal with the U.S. and the resignation of President Lee Myung-bak in Seoul June 22, 2008. South Korea, which reworked an unpopular U.S. beef import deal that sparked mass street protests, could soon resume imports once a legal step has been completed, the trade minister said on Saturday. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Protesters take part in a rally demanding a full-scale renegotiation of the beef deal with the U.S. and the resignation of President Lee Myung-bak in Seoul June 21, 2008. South Korea, which reworked an unpopular U.S. beef import deal that sparked mass street protests, could soon resume imports once a legal step has been completed, the trade minister said on Saturday. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Riot police scuffle with protesters, some of whom are members of the reserve forces, as the former try to disperse protesters during a candle-light rally to demand full-scale renegotiation of a beef deal with the U.S. and the resignation of President Lee Myung-bak on the road leading to the U.S. embassy and the presidential Blue House in Seoul early June 21, 2008. Thousands of people participated in the rally after widespread South Korean concern over mad-cow disease in U.S. beef quickly became the lightning rod for a wide range of grievances against Lee's government. REUTERS/Lee Jae-Won (SOUTH KOREA) 

Policemen stand guard behind a police line to block people participating in a candle-light rally demanding full-scale renegotiation of a beef deal with the U.S. and the resignation of President Lee Myung-bak on the road leading to the U.S. embassy and the presidential Blue House in Seoul June 15, 2008. Thousands of people participated in the rally after widespread South Korean concern over mad-cow disease in U.S. beef quickly became the lightning rod for a wide range of grievances against Lee's government. REUTERS/Lee Jae-Won (SOUTH KOREA) 

Riot police scuffle with protesters to break them up after an overnight candle-lit vigil on a street leading to the U.S. Embassy and the presidential Blue House in central Seoul June 11, 2008. Hundreds of thousands of people fearing infection of mad cow disease across the country demonstrated from Tuesday to demand full-scale renegotiation of a beef deal with the U.S. and the resignation of President Lee Myung-bak as they commemorate the historic June 10 mass pro-democracy demonstrations in 1987. REUTERS/Lee Jae-Won (SOUTH KOREA) 

Protesters chant slogans at a candlelight vigil on a street leading to the U.S. embassy and the presidential Blue House in central Seoul June 10, 2008. About one million people fearing infection of mad cow disease across the country demonstrated Tuesday evening to demand full-scale renegotiation of a beef deal with the U.S. and the resignation of President Lee Myung-bak as they commemorate the historic June 10 mass pro-democracy demonstrations in 1987. REUTERS/Lee Jae-Won (SOUTH KOREA) 

Protesters chant slogans at a candlelight vigil on a street leading to the U.S. embassy and the presidential Blue House in central Seoul June 10, 2008. About one million people fearing infection of mad cow disease across the country demonstrated on Tuesday evening to demand full-scale renegotiation of a beef deal with the U.S. and the resignation of President Lee Myung-bak as they commemorate the historic June 10 mass pro-democracy demonstrations in 1987. REUTERS/Lee Jae-Won (SOUTH KOREA) 

A protester paints graffiti on cargo containers that hold sand set up by the police as barricades to block a planned protest march on a street leading to the U.S. embassy and the presidential Blue House in central Seoul June 10, 2008. The containers were welded together and on to the road. About one million people fearing infection of mad cow disease across the country will demonstrate Tuesday evening to demand full-scale renegotiation of a beef deal with the U.S. and the resignation of President Lee Myung-bak as they commemorate the historic June 10 mass pro-democracy demonstrations in 1987. The Korean characters on the container read: "Mad 2MB (Lee Myung-bak)." REUTERS/Lee Jae-Won (SOUTH KOREA) 

Protesters holding candles march during a rally demanding a full-scale renegotiation of the beef deal with the U.S. and the resignation of President Lee Myung-bak around the city hall in Seoul June 7, 2008. Hundreds of thousands of people fearing infection of mad cow disease participated in the protest. Lee, bruised by daily protests over U.S. beef imports, will call President George W. Bush on Saturday to ask for help in ensuring no meat from older cattle will be shipped, an official said. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Protesters carry a sign symbolizing U.S. beef infected by mad cow disease during a rally demanding the renegotiation of the U.S. beef import deal, in Seoul May 31, 2008. A new deal has been agreed which allows all cuts of U.S. beef to be imported to South Korea. Protesters, fearing an outbreak of mad cow disease, demanded President Lee Myung-bak resign. The country will start quarantine inspections on U.S. beef, which will lead to a full resumption of the beef imports next week for the first time since an outbreak of mad cow disease in the U.S. in 2003. REUTERS/Lee Jae-Won (SOUTH KOREA) 

People shout slogans during an anti-government rally denouncing U.S. beef imports and South Korean President Lee Myung-bak in front of the city hall in Seoul, May 29, 2008. South Korea will start quarantine inspections on U.S. beef, which will lead next week to a full resumption of American beef imports for the first time in more than four years, Seoul's farm ministry said on Thursday. The green banner reads, "Lee Myung-bak out". REUTERS/Jo Yong-Hak (SOUTH KOREA) 

A protester holds a doll "infected" with the variant Creutzfeldt-Jakob disease during a rally criticizing the U.S. beef import deal in Seoul May 14, 2008. South Korea will delay the resumption of U.S. beef imports in the face of mounting public concern over the safety of the product, the farm ministry said on Wednesday. REUTERS/Jo Yong-Hak (SOUTH KOREA) 

Leaders of a South Korean farmers' group chant slogans at a rally protesting against the importation of U.S. beef in front of the government complex in Seoul October 30, 2006. The first shipment of U.S. beef since South Korea ended a 3-year-old ban on American beef imports arrived at South Korea's Incheon airport on Monday, the Agriculture Ministry said. REUTERS/Lee Jae-Won (SOUTH KOREA) 

A South Korean employee of a slaughter house examines slaughtered domestic cattle before an auction in Seoul January 9, 2006. Seoul and Washington on Monday began discussing a resumption of U.S. beef exports to to South Korea, once the third-largest market for U.S. beef. South Korea has been under pressure from Washington to lift a ban it imposed in 2003 after the first U.S. case of the deadly mad cow disease, formally known as bovine spongiform encephalopathy (BSE).Picture taken January 9, 2006. REUTERS/Lee Jae-Won 

A South Korean eats domestic roast beef at a restaurant in Seoul December 14, 2005. A South Korean animal quarantine committee failed on Wednesday to make a recommendation on whether to lift a ban on U.S. beef imports put in place due to mad cow concerns, saying members were divided on the safety risks. REUTERS/Kim Kyung-Hoon 

File photo of a rancher herding his healthy calves on a ranch in the Cyprus Hills region of southeastern Alberta in Elkwater, on January 4, 2005. Canada said on January 11, 2005 it had found its second case of mad cow disease in 10 days, raising new questions as to whether Washington would scrap plans to soon end a crippling ban on imports of live Canadian cattle. The new case is Canada's third home-grown instance of bovine spongiform encephalopathy (BSE). Washington imposed a ban on cattle imports in May 2003 after Canada revealed its first case of mad cow disease. A ban on many beef products has since been lifted. REUTERS/J.P. Moczulski/FILE JPM 

File photo taken January 4, 2005 shows a herd of healthy Black Angus calves on a ranch in the Cyprus Hills region in Elkwater, Southeastern Alberta. The Canadian Food Inspection Agency announced on January 11, 2005, that a suspected new case of bovine spongiform encephalopathy, also known as mad cow disease, had been detected in Western Alberta. The affected cow was born after feed restrictions to eliminate the spread of the brain-wasting disease had already been implemented. REUTERS/J.P. Moczulski/FILE JPM 

A rancher herds his healthy calves on a ranch in the Cyprus Hills region in Elkwater, Southeastern Alberta. A January 4, 2005 photo shows a rancher herding his healthy calves on a ranch in the Cyprus Hills region in Elkwater, Southeastern Alberta. The Canadian Food Inspection Agency announced on January 11, 2005, that a new case of bovine spongiform encephalopathy, also known as mad cow disease, had been detected in Western Alberta. The affected cow was born after feed restrictions to eliminate the spread of the brain-wasting disease had already been implemented. REUTERS/J.P. Moczulski 

U.S. Secretary of Agriculture Ann Veneman testifies before congress on Capitol Hill in Washington, January 21, 2004. Veneman on Wednesday said she did not yet know what safety steps the United States would have to take on mad cow disease to convince Japan and other major importers of U.S. beef to reopen their markets. U.S. beef exports were virtually shut down after the Dec. 23 finding of one case of bovine spongiform encephalopathy in a dairy cow slaughtered in Washington state. REUTERS/William Philpott WP/JDP 

U.S. Agriculture Secretary Ann Veneman testifies before congress on Capitol Hill in Washington, January 21, 2004. Veneman on Wednesday said she did not yet know what safety steps the United States would have to take on mad cow disease to convince Japan and other major importers of U.S. beef to reopen their markets. U.S. beef exports were virtually shut down after the Dec. 23 finding of one case of bovine spongiform encephalopathy in a dairy cow slaughtered in Washington state. REUTERS/William Philpott WP/JDP 

Sous chef Allison Jester displays a grilled filet mignon coated with Starbucks espresso coffee grounds, at Rippe's steakhouse in Seattle, Washington, January 15, 2004. Jester created the now popular entree as an experiment about a month ago in coffee-crazed Seattle even while the story of mad cow disease in a Mabton, Washington cow was making headlines across the country. Jester said despite the recent bovine spongiform encephalopathy (BSE) incident discovered in Washington, sales of beef dishes at her restaurant have been up, due in part to her coffee-steak creation. REUTERS/Anthony P. Bolante PP04010051 APB/HB 

Sous chef Allison Jester grills a filet mignon coated with Starbucks espresso coffee grounds at Rippe's steakhouse in Seattle, Washington January 15, 2004. Jester created the now popular entree as an experiment about a month ago in coffee-crazed Seattle even while the story of mad cow disease in a Mabton, Washington cow was making headlines across the country. Jester said despite the recent Bovine Spongiform Encephalopathy (BSE) incident discovered in Washington, Jester said that sales of beef dishes at her restaurant have been up, due in part to her coffee-steak creation. REUTERS/Anthony P. Bolante APB 

Sous chef Allison Jester coats a filet mignon with Starbucks espresso grounds before grilling it at Rippe's steakhouse in Seattle, Washington January 15, 2004. Jester created the now popular entree as an experiment about a month ago in coffee-crazed Seattle even while the story of mad cow disease in a Mabton, Washington cow was making headlines across the country. Jester said despite the recent Bovine Spongiform Encephalopathy (BSE) incident discovered in Washington, Jester said that sales of beef dishes at her restaurant have been up, due in part to her coffee-steak creation. REUTERS/Anthony P. Bolante APB 

U.S. Food and Drug Administration Director of Veterinary Medicine Stephen Sundlof speaks to the press at the U.S. Department of Agriculture in Washington, December 29, 2003. U.S. officials insisted there was no risk to consumers from meat recalled in the first U.S. case of mad cow disease on Monday. Since the discovery of mad cow disease, bovine spongiform encephalopathy, in a dairy cow in Washington state a week ago, U.S. officials have recalled 10,000 lbs (4,545 kgs) of beef. REUTERS/William Philpott WP/GN 

Kenneth Petersen, an official with the U.S. Department of Agriculture Food Safety Inspection Service (L) speaks as USDA chief veterinarian Ron DeHaven looks on, at the U.S. Agriculture Building in Washington, December 29, 2003. U.S. officials insisted there was no risk to consumers from meat recalled in the first U.S. case of mad cow disease on Monday. Since the discovery of mad cow disease, bovine spongiform encephalopathy, in a dairy cow in Washington state a week ago, U.S. officials have recalled 10,000 lbs (4,545 kgs) of beef. REUTERS/William Philpott WP/GN 

Kenneth Petersen, an official with the U.S. Department of Agriculture Food Safety Inspection Service, speaks to the press during a briefing at the U.S. Agriculture Building in Washington, December 29, 2003. U.S. officials insisted there was no risk to consumers from meat recalled in the first U.S. case of mad cow disease on Monday. Since the discovery of mad cow disease, bovine spongiform encephalopathy, in a dairy cow in Washington state a week ago, U.S. officials have recalled 10,000 lbs (4,545 kgs) of beef. REUTERS/William Philpott WP/GN 

U.S. Department of Agriculture chief veterinarian Ron DeHaven (R) speaks as Kenneth Petersen, an official with the USDA Food Safety Inspection Service looks on, at the U.S. Agriculture Building in Washington, December 29, 2003. U.S. officials insisted there was no risk to consumers from meat recalled in the first U.S. case of mad cow disease on Monday. Since the discovery of mad cow disease, bovine spongiform encephalopathy, in a dairy cow in Washington state a week ago, U.S. officials have recalled 10,000 lbs (4,545 kgs) of beef. REUTERS/William Philpott WP/GN 

U.S. Department of Agriculture chief veterinarian Ron DeHaven (C) speaks as Kenneth Petersen, an official with the USDA Food Safety Inspection Service (L) and Food and Drug Administration Director for Veterinary Medicine Stephan Sundlof look on, at the U.S. Agriculture Building in Washington, December 29, 2003. U.S. officials insisted there was no risk to consumers from meat recalled in the first U.S. case of mad cow disease on Monday. Since the discovery of mad cow disease, bovine spongiform encephalopathy, in a dairy cow in Washington state a week ago, U.S. officials have recalled 10,000 lbs (4,545 kgs) of beef. REUTERS/William Philpott WP/GN 

A researcher at Hyundai department store takes DNA samples from South Korean beef in Seoul December 26, 2003. South Korea has temporarily stopped imports of U.S. beef after the United States reported its first case of mad cow disease earlier this week. HALTH REUTERS/Kim Kyung-Hoon pictures of the month december 2003 KKH/FA 

Secretary of the U.S. Department of Agriculture Ann Veneman departs after briefing the media in Washington, December 23, 2003. Veneman said on Tuesday that an animal infected with mad cow disease in rural Washington state was slaughtered and the U.S. Agriculture Department is tracing where the meat went. Mad cow disease, also known as bovine spongiform encephalopathy (BSE), has never been found before in the United States. REUTERS/Yuri Gripas YG/HB