31 Oct 2012:
U.S. Honeybees Have Developed
Resistance to Antibiotic, Study Says
Honeybees in the U.S. have developed widespread resistance to the antibiotic tetracycline
, likely as a result of decades of exposure to preventive antibiotics in domesticated hives, a new study has found. In tests conducted on bees in several countries, scientists from Yale University say they identified eight tetracycline resistance genes in U.S. honeybees that were largely absent in bees found in places where the antibiotics are banned. In the U.S., the use of oxytetracycline — a compound similar to tetracycline — has been common since the 1950s to help prevent outbreaks of “foulbrood,” a bacterial disease that can devastate honeybee hives. “There’s a pattern here, where the U.S. has these genes and the other [countries] don’t,” said Nancy Moran, a lead author of the study published in the journal mBio
. The authors warn that the treatment meant to prevent disease and strengthen honeybee hives in the U.S. may have actually weakened the bees’ ability to fight off other pathogens.
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A look at how acidifying oceans could threaten the Dungeness crab, one of the most valuable fisheries on the U.S. West Coast. Watch the video.
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An aerial view of why Europe’s per capita carbon emissions are less than 50 percent of those in the U.S. View the photos.
An indigenous tribe’s deadly fight to save its ancestral land in the Amazon rainforest from logging. Learn more.
video series looks at the staggering amount of food wasted in the U.S. – a problem with major human and environmental costs. Watch the video.
Residents of the Chocó Rainforest in Ecuador are choosing to plant cacao over logging in an effort to slow deforestation.
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Tribal people and ranchers join together to stop a project that would haul coal across their Montana land. Watch the video.