Antibiotic resistance: Experts warn of 'post-antibiotic era'

Bacteria are becoming resistant to the last group of antibiotics that can still fight superbugs, medical experts have warned.

Scientists have identified bacteria able to shrug off the drug of last resort - colistin - in patients and livestock in China.

They are warning that the world is on the cusp of a "post-antibiotic era", where resistance would spread around the world and create untreatable infections.

Medical correspondent Fergus Walsh reports.