SCIENCE IN THE NEWS DAILY

U.S. Tightens Rules on Antibiotics Use for Livestock

from the New York Times (Registration Required)

Farmers and ranchers will for the first time need a prescription from a veterinarian before using antibiotics in farm animals, in hopes that more judicious use of the drugs will reduce the tens of thousands of human deaths that result each year from the drugs' overuse.

The Food and Drug Administration announced the new rule Wednesday after trying for more than 35 years to stop farmers and ranchers from feeding antibiotics to cattle, pigs, chickens and other animals simply to help the animals grow larger. Using small amounts of antibiotics over long periods of time leads to the growth of bacteria that are resistant to the drugs' effects, endangering humans who become infected but cannot be treated with routine antibiotic therapy.

At least two million people are sickened and an estimated 99,000 die every year from hospital-acquired infections, the majority of which result from such resistant strains. It is unknown how many of these illnesses and deaths result from agricultural uses of antibiotics, but about 80 percent of antibiotics sold in the United States are used in animals.