zoom RSS 動物への抗生物質使用を制限/FDA

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画像 FDAは、薬剤耐性菌を減らすために、牛・鶏・豚への水や飼料にペニシリンやテトラサイクリンなどを使用することを禁止する方向で動き始めたという。しかし、30年以上にわたりこうした用途の禁止を目指してきたが、議会は農業利益保護のために介入してFDAの行動を抑止してきた。
Antibiotics in Animals Need Limits, F.D.A. Says
Published: June 28, 2010

WASHINGTON ― Federal food regulators took a tentative step Monday toward banning a common use of penicillin and tetracycline in the water and feed given cattle, chickens and pigs in hopes of slowing the growing scourge of killer bacteria.

But the Food and Drug Administration has tried without success for more than three decades to ban such uses. In the past, Congress has stepped in at the urging of agricultural interests and stopped the agency from acting.

In the battle between public health and agriculture, the guys with the cowboy hats generally win.

The F.D.A. released a policy document stating that agricultural uses of antibiotics should be limited to assuring animal health, and that veterinarians should be involved in the drugs’ uses.

While doing nothing to change the present oversight of antibiotics, the document is the first signal in years that the agency intends to rejoin the battle to crack down on agricultural uses of antibiotics that many infectious disease experts oppose.

Dr. Joshua M. Sharfstein, the agency’s principal deputy commissioner, refused at a news conference to give details about when the agency would take more concrete steps.

“We believe this is a public health issue of some urgency,” Dr. Sharfstein said. “We’re looking to see some progress soon.”

About 100,000 people die every year from hospital-acquired infections caused by bacteria that, because of overuse of antibiotics, have developed resistance to the usual remedies and cannot be killed with them. Many others die from superbugs contracted outside hospitals.

How many deaths can be attributed to agricultural uses of antibiotics?

“I don’t think anyone knows that number,” said Dr. James Johnson, a professor of medicine at the University of Minnesota, “but I think it’s substantial.”

Antibiotics are used in agriculture for three reasons: to promote animal growth, prevent illness and treat sickness. How antibiotics in feed and water help to fatten animals is not entirely clear.

The industrialization of animal husbandry has increased processors’ dependence on antibiotics because factory farm animals tend to be sicker and feed-lot diets can encourage bacterial infections.

The Union of Concerned Scientists estimated in 2001 that 84 percent of all antibiotics were used in agriculture and that 70 percent were used simply to promote animal growth, not to treat or prevent illness. The Animal Health Institute, a trade association, estimated that 13 percent of agricultural antibiotics were used to promote growth.

Dave Warner, a spokesman for the National Pork Producers Council, said most agricultural antibiotics were given to healthy animals not to promote growth but to prevent illness.

The distinction is important because F.D.A. officials said they were mostly concerned with the use of antibiotics to promote growth ― not to prevent or treat illnesses. If the agency some day bans growth promotion as a use, there is a chance producers would simply relabel such uses as preventative.

Mr. Warner said his organization opposed the F.D.A.’s guidance. “We think this guidance could lead to the elimination or costly review of previously approved animal health products,” he said.

The Animal Health Institute said in a statement that it welcomed the guidance and had “long supported efforts to promote judicious use of antibiotics.”

Representative Louise M. Slaughter, Democrat of New York and chairwoman of the House Rules Committee, said the F.D.A. had “not gone far enough or moved fast enough.” Ms. Slaughter has proposed legislation banning nontherapeutic uses of some classes of antibiotics.


For Immediate Release: June 28, 2010
Media Inquiries: Siobhan DeLancey, 301-796-4668, siobhan.delancey@fda.hhs.gov
Trade Press Inquiries: Shannon Cameron, 240-276-9134, shannon.cameron@fda.hhs.gov
Consumer Inquiries: 888-INFO-FDA

FDA Issues Draft Guidance on the Judicious Use of Medically Important Antimicrobials in Food-Producing Animals

The U.S. Food and Drug Administration today issued draft guidance intended to help reduce the development of resistance to medically important antimicrobial drugs used in food-producing animals.

Today’s draft guidance outlines the FDA’s current thinking on strategies to assure that antimicrobial drugs that are important for therapeutic use in humans are used judiciously in animal agriculture. The FDA acknowledges the efforts to date by various veterinary and animal producer organizations to institute guidelines for the judicious use of antimicrobial drugs, but the agency believes additional steps are needed.

The draft guidance summarizes a number of published reports on antimicrobial resistance and states that the overall weight of evidence available to date supports the conclusion that using medically important antimicrobial drugs for production or growth enhancing purposes (i.e., non-therapeutic or subtherapeutic uses) in food-producing animals is not in the interest of protecting and promoting the public health.

The document recommends phasing in measures that would limit medically important antimicrobial drugs to uses in food-producing animals that are considered necessary for assuring animal health and that include veterinary oversight or consultation. These steps would help reduce overall use of medically important antimicrobial drugs, thereby reducing the pressure that generates antimicrobial resistance.

The FDA recognizes the importance of antimicrobial drugs for addressing the health needs of animals. Antimicrobial drugs have been widely used in human and veterinary medicine for more than 50 years with benefits to both human and animal health. The development of resistance to these drugs, and the resulting loss of their effectiveness, poses a serious public health threat.

“Using medically important antimicrobial drugs as judiciously as possible is key to minimizing resistance development and preserving the effectiveness of these drugs as therapies for humans and animals,” said Bernadette Dunham, D.V.M., Ph.D., director of the FDA’s Center for Veterinary Medicine. “FDA is committed to working with animal drug sponsors, the veterinary and public health communities, the animal agriculture community, and all other interested stakeholders in developing a practical strategy to address antimicrobial resistance concerns that is protective of both human and animal health.”

The agency invites comments on the draft guidance, available online and titled The Judicious Use of Medically Important Antimicrobial Drugs in Food-Producing Animals.


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