How Pigs on Antibiotics Are Making Superbugs Stronger
Howdy, Pig Lord Rex via FlickrBut genome detective work could uncover new weapons in the war on bugs Methicillin-resistant Staphylococcus aureus, (MRSA) a nasty strain of bacteria that resists most antibiotics, probably developed its defenses while spending time down on the farm, a new study says. It has been thought that humans' antibiotic abuse is the catalyst in superbug genesis, but this new research suggests it's the animals, and the drugs we feed them, that we should worry about. A new paper in the journal mBio, published by the American Society for Microbiology, describes how a human strain of MRSA started out as a drug-defeatable bug and then transferred into the pig population, where it developed resistance to two common forms of antibiotics. Then the newly potent antibiotic-resistant staph jumped back into humans. Researchers traced its evolutionary history by examining 89 genomes from humans, turkeys, chickens and pigs from 19...
