Antibiotic resistance: World on cusp of 'post-antibiotic era'

Excerpt: "The world is on the cusp of a "post-antibiotic era", scientists have warned after finding bacteria resistant to drugs used when all other treatments have failed.  They identified bacteria able to shrug off the drug of last resort - colistin - in patients and livestock in China. They said that resistance would spread around the world and raised the spectre of untreatable infections."